Pilot pattern design for a STTD scheme in an OFDM system

1. A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system having a plurality of transmission antennas, the device comprising:

a symbol generator that generates said data symbols and said pilot symbols; and

a transmitter that transmits said data symbols and pilot symbols respectively by using a plurality of subcarriers of said OFDM transmission system via said plurality of transmission antennas,

wherein said symbol generator generates a first type pilot symbol and a second type pilot symbol having an inverted value of said first type pilot symbol so that a first pilot symbol pattern to be transmitted by using one of said plurality of transmission antennas has a different pattern in the frequency and time dimension from a second pilot symbol pattern to be transmitted by using another transmission antenna, and

wherein first pilot symbols are comprised in said first pilot symbol pattern and second pilot symbols are comprised in said second pilot symbol pattern, at least some of the first and second pilot symbols having the same time allocation and being alternately identical and inverted to each other.

2. A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system having a plurality of transmission antennas, the device comprising:

a symbol generator that generates said data symbols and said pilot symbols; and

a transmitter that transmits said data symbols and pilot symbols respectively by using a plurality of subcarriers of said OFDM transmission system via said plurality of transmission antennas,

wherein said symbol generator generates a first type pilot symbol and a second type pilot symbol having an inverted value of said first type pilot symbol so that a first pilot symbol pattern to be transmitted by using one of said plurality of transmission antennas has a different pattern in the frequency and time dimension from a second pilot symbol pattern to be transmitted by using another transmission antenna, and

wherein first pilot symbols are comprised in said first pilot symbol pattern and second pilot symbols are comprised in said second pilot symbol pattern, at least some of the first and second pilot symbols having the same frequency allocation and being alternately identical and inverted to each other.

3. A transmitting device according to claim 1 or 2 ,

wherein said first and second pilot symbols have the same frequency and time allocation and are alternately identical and inverted to each other in the frequency as well as in the time dimension.

4. A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system having a plurality of transmission antennas, the device comprising:

a symbol generator that generates said data symbols and said pilot symbols; and

a transmitter that transmits said data symbols and pilot symbols by using a plurality of subcarriers of said OFDM transmission system via said plurality of transmission antennas,

wherein a first pilot symbol pattern, in where a first type pilot symbol and a second type pilot symbol having an inverted value of said first type pilot symbol are regularly allocated in the frequency and time dimension, to be transmitted by using one of said plurality of transmission antennas is different from a second pilot symbol pattern to be transmitted by using another transmission antenna, and

wherein first pilot symbols are comprised in said first pilot symbol pattern and second pilot symbols are comprised in said second pilot symbol pattern, at least some of the first and second pilot symbols having the same time allocation and being alternately identical and inverted to each other.

5. A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system having a plurality of transmission antennas, the device comprising:

a symbol generator that generates said data symbols and said pilot symbols; and

a transmitter that transmits said data symbols and pilot symbols by using a plurality of subcarriers of said OFDM transmission system via said plurality of transmission antennas,

wherein a first pilot symbol pattern, in where a first type pilot symbol and a second type pilot symbol having an inverted value of said first type pilot symbol are regularly allocated in the frequency and time dimension, to be transmitted by using one of said plurality of transmission antennas is different from a second pilot symbol pattern to be transmitted by using another transmission antenna, and

wherein first pilot symbols are comprised in said first pilot symbol pattern and second pilot symbols are comprised in said second pilot symbol pattern, at least some of the first and second pilot symbols having the same frequency allocation and being alternately identical and inverted to each other.

6. A transmitting device according to claim 4 or 5 ,

wherein said first and second pilot symbols have the same frequency and time allocation and are alternately identical and inverted to each other in the frequency as well as in the time dimension.

7. A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system, the device comprising:

a symbol generator that generates said data symbols and said pilot symbols; and

a transmitter that transmits said data symbols and pilot symbols by using a plurality of subcarriers of said OFDM transmission system via a plurality of transmission antennas,

wherein said symbol generator assigns either a first type pilot symbol or a second type pilot symbol having an inverted value of said first type pilot symbol to said generated pilot symbols in the frequency and time dimension in a different manner for each of said plurality of transmission antennas, and

wherein first pilot symbols are comprised in a first pilot symbol pattern and second pilot symbols are comprised in a second pilot symbol pattern, at least some of the first and second pilot symbols having the same time allocation and being alternately identical and inverted to each other.

8. A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system, the device comprising:

a symbol generator that generates said data symbols and said pilot symbols; and

a transmitter that transmits said data symbols and pilot symbols by using a plurality of subcarriers of said OFDM transmission system via a plurality of transmission antennas,

wherein said symbol generator assigns either a first type pilot symbol or a second type pilot symbol having an inverted value of said first type pilot symbol to said generated pilot symbols in the frequency and time dimension in a different manner for each of said plurality of transmission antennas, and

wherein first pilot symbols are comprised in a first pilot symbol pattern and second pilot symbols are comprised in a second pilot symbol pattern, at least some of the first and second pilot symbols having the same frequency allocation and being alternately identical and inverted to each other.

9. A transmitting device according to claim 7 or 8 ,

wherein said first and second pilot symbols have the same frequency and time allocation and are alternately identical and inverted to each other in the frequency as well as in the time dimension.

10. A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system, the device comprising:

a symbol generator that generates said data symbols and said pilot symbols; and

a transmitter that transmits said data symbols and pilot symbols by using a plurality of subcarriers of said OFDM transmission system via a plurality of transmission antennas,

wherein said symbol generator generates a first type pilot symbol and a second type pilot symbol having an inverted value of said first type pilot symbol in the frequency and time dimension, and wherein first pilot symbols are comprised in a first pilot symbol pattern and second pilot symbols are comprised in a second pilot symbol pattern, at least some of the first and second pilot symbols having the same time allocation and being alternately identical and inverted to each other.

11. A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system, the device comprising:

a symbol generator that generates said data symbols and said pilot symbols; and

a transmitter that transmits said data symbols and pilot symbols by using a plurality of subcarriers of said OFDM transmission system via a plurality of transmission antennas,

wherein said symbol generator generates a first type pilot symbol and a second type pilot symbol having an inverted value of said first type pilot symbol in the frequency and time dimension, and

wherein first pilot symbols are comprised in a first pilot symbol pattern and second pilot symbols are comprised in a second pilot symbol pattern, at least some of the first and second pilot symbols having the same frequency allocation and being alternately identical and inverted to each other.

12. A transmitting device according to claim 10 or 11 ,

wherein said first and second pilot symbols have the same frequency and time allocation and are alternately identical and inverted to each other in the frequency as well as in the time dimension.

13. A transmitting device for transmitting data symbols and pilot symbols in an OFDM communication system having a plurality of transmission antennas, the device comprising:

a symbol generator that generates for generating said data symbols and said pilot symbols, wherein said symbol generator generates first pilot symbols and second pilot symbols, wherein said first pilot symbols and second pilot symbols are of the same type, and wherein some of said first and second pilot symbols in the time as well as in the frequency dimension are identical to each other and some of said first and second pilot symbols in the time as well as in the frequency dimension are respectively inverted to each other; and

a transmitter that transmits said data symbols and pilot symbols respectively by using a plurality of subcarriers and timeslots of said OFDM transmission system, wherein a first transmission antenna of said plurality of transmission antennas transmits said first pilot symbols and a second transmission antenna of said plurality of transmission antennas transmits said second pilot symbols, and wherein said first and second pilot symbols are respectively transmitted in the same timeslots and the same subcarriers of the OFDM communication system, wherein at least some of the first and second pilot symbols have the same time allocation and are alternately identical and inverted to each other.

14. A transmitting device for transmitting data symbols and pilot symbols in an OFDM communication system having a plurality of transmission antennas, the device comprising:

a symbol generator that generates said data symbols and said pilot symbols, wherein said symbol generator generates first pilot symbols and second pilot symbols, wherein said first pilot symbols and second pilot symbols are of the same type, and wherein some of said first and second pilot symbols in the time as well as in the frequency dimension are identical to each other and some of said first and second pilot symbols in the time as well as in the frequency dimension are respectively inverted to each other; and

a transmitter that transmits said data symbols and pilot symbols respectively by using a plurality of subcarriers and timeslots of said OFDM transmission system, wherein a first transmission antenna of said plurality of transmission antennas transmits said first pilot symbols and a second transmission antenna of said plurality of transmission antennas transmits said second pilot symbols, and wherein said first and second pilot symbols are respectively transmitted in the same timeslots and the same subcarriers of the OFDM communication system, wherein at least some of the first and second pilot symbols have the same frequency allocation and are alternately identical and inverted to each other.

15. A transmitting device according to claim 13 or 14 ,

wherein said first and second pilot symbols are alternately identical and inverted to each other in the frequency as well as in the time dimension.

16. A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system having a plurality of transmission antennas, the device comprising:

a symbol generator that generates said data symbols and said pilot symbols; and

a transmitter that transmits said data symbols and pilot symbols respectively by using a plurality of subcarriers of said OFDM transmission system via said plurality of transmission antennas,

wherein said symbol generator generates a first type pilot symbol and a second type pilot symbol being orthogonal to said first type pilot symbol so that a first pilot symbol pattern to be transmitted by using one of said plurality of transmission antennas has a different pattern in the frequency and time dimension from a second pilot symbol pattern to be transmitted by using another transmission antenna, and

wherein first pilot symbols are comprised in said first pilot symbol pattern and second pilot symbols are comprised in said second pilot symbol pattern, at least some of the first and second pilot symbols having the same time allocation and being alternately identical and orthogonal to each other.

17. A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system having a plurality of transmission antennas, the device comprising:

a symbol generator that generates said data symbols and said pilot symbols; and

a transmitter that transmits said data symbols and pilot symbols respectively by using a plurality of subcarriers of said OFDM transmission system via said plurality of transmission antennas,

wherein said symbol generator generates a first type pilot symbol and a second type pilot symbol being orthogonal to said first type pilot symbol so that a first pilot symbol pattern to be transmitted by using one of said plurality of transmission antennas has a different pattern in the frequency and time dimension from a second pilot symbol pattern to be transmitted by using another transmission antenna, and

wherein first pilot symbols are comprised in said first pilot symbol pattern and second pilot symbols are comprised in said second pilot symbol pattern, at least some of the first and second pilot symbols having the same frequency allocation and being alternately identical and orthogonal to each other.

18. A transmitting device according to claim 16 or 17 ,

wherein said first and second pilot symbols are alternately identical and orthogonal to each other in the frequency as well as in the time dimension.

19. A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system having a plurality of transmission antennas, the device comprising:

a symbol generator that generates said data symbols and said pilot symbols; and

a transmitter that transmits said data symbols and pilot symbols by using a plurality of subcarriers of said OFDM transmission system via said plurality of transmission antennas,

wherein a first pilot symbol pattern, in where a first type pilot symbol and a second type pilot symbol being orthogonal to said first type pilot symbol are regularly allocated in the frequency and time dimension, to be transmitted by using one of said plurality of transmission antennas is different from a second pilot symbol pattern to be transmitted by using another transmission antenna, and

wherein first pilot symbols are comprised in said first pilot symbol pattern and second pilot symbols are comprised in said second pilot symbol pattern, at least some of the first and second pilot symbols having the same time allocation and being alternately identical and orthogonal to each other.

20. A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system having a plurality of transmission antennas, the device comprising:

a symbol generator that generates said data symbols and said pilot symbols; and

a transmitter that transmits said data symbols and pilot symbols by using a plurality of subcarriers of said OFDM transmission system via said plurality of transmission antennas,

wherein a first pilot symbol pattern, in where a first type pilot symbol and a second type pilot symbol being orthogonal to said first type pilot symbol are regularly allocated in the frequency and time dimension, to be transmitted by using one of said plurality of transmission antennas is different from a second pilot symbol pattern to be transmitted by using another transmission antenna, and

wherein first pilot symbols are comprised in said first pilot symbol pattern and second pilot symbols are comprised in said second pilot symbol pattern, at least some of the first and second pilot symbols having the same frequency allocation and being alternately identical and orthogonal to each other.

21. A transmitting device according to claim 19 or 20 ,

wherein said first and second pilot symbols are alternately identical and orthogonal to each other in the frequency as well as in the time dimension.

22. A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system, the device comprising:

a symbol generator that generates said data symbols and said pilot symbols; and

a transmitter that transmits said data symbols and pilot symbols by using a plurality of subcarriers of said OFDM transmission system via a plurality of transmission antennas,

wherein said symbol generator assigns either a first type pilot symbol or a second type pilot symbol being orthogonal to said first type pilot symbol to said generated pilot symbols in the frequency and time dimension in the different manner for each of said plurality of transmission antennas, and

wherein first pilot symbols are comprised in a first pilot symbol pattern and second pilot symbols are comprised in a second pilot symbol pattern, at least some of the first and second pilot symbols having the same time allocation and being alternately identical and orthogonal to each other.

23. A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system, the device comprising:

a symbol generator that generates said data symbols and said pilot symbols; and

a transmitter that transmits said data symbols and pilot symbols by using a plurality of subcarriers of said OFDM transmission system via a plurality of transmission antennas,

wherein said symbol generator assigns either a first type pilot symbol or a second type pilot symbol being orthogonal to said first type pilot symbol to said generated pilot symbols in the frequency and time dimension in the different manner for each of said plurality of transmission antennas, and

wherein first pilot symbols are comprised in a first pilot symbol pattern and second pilot symbols are comprised in a second pilot symbol pattern, at least some of the first and second pilot symbols having the same frequency allocation and being alternately identical and orthogonal to each other.

24. A transmitting device according to claim 22 or 23 ,

wherein said first and second pilot symbols are alternately identical and orthogonal to each other in the frequency as well as in the time dimension.

25. A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system, the device comprising:

a symbol generator that generates said data symbols and said pilot symbols; and

a transmitter that transmits said data symbols and pilot symbols by using a plurality of subcarriers of said OFDM transmission system via a plurality of transmission antennas,

wherein said symbol generator is designed to generate a first type pilot symbol and a second type pilot symbol being orthogonal to said first type pilot symbol in the frequency and time dimension, and

wherein first pilot symbols are comprised in a first pilot symbol pattern and second pilot symbols are comprised in a second pilot symbol pattern, at least some of the first and second pilot symbols having the same time allocation and being alternately identical and orthogonal to each other.

26. A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system, the device comprising:

a symbol generator that generates said data symbols and said pilot symbols; and

a transmitter that transmits said data symbols and pilot symbols by using a plurality of subcarriers of said OFDM transmission system via a plurality of transmission antennas,

wherein said symbol generator generates a first type pilot symbol and a second type pilot symbol being orthogonal to said first type pilot symbol in the frequency and time dimension, and

wherein first pilot symbols are comprised in a first pilot symbol pattern and second pilot symbols are comprised in a second pilot symbol pattern, at least some of the first and second pilot symbols having the same frequency allocation and being alternately identical and orthogonal to each other.

27. A transmitting device according to claim 25 or 26 ,

wherein said first and second pilot symbols are alternately identical and orthogonal to each other in the frequency as well as in the time dimension.

28. A transmitting device for transmitting data symbols and pilot symbols in an OFDM communication system having a plurality of transmission antennas, the device comprising:

a symbol generator that generates said data symbols and said pilot symbols, wherein said symbol generator generates first pilot symbols and second pilot symbols, wherein said first pilot symbols and second pilot symbols are of the same type, and wherein some of said first and second pilot symbols in the time as well as in the frequency dimension are identical to each other and some of said first and second pilot symbols in the time as well as in the frequency dimension are respectively orthogonal to each other; and

a transmitter that transmits said data symbols and pilot symbols respectively by using a plurality of subcarriers and timeslots of said OFDM transmission system, wherein a first transmission antenna of said plurality of transmission antennas transmits said first pilot symbols and a second transmission antenna of said plurality of transmission antennas transmits said second pilot symbols, and wherein said first and second pilot symbols are respectively transmitted in the same timeslots and the same subcarriers of the OFDM communication system,

wherein at least some of the first and second pilot symbols have the same time allocation and are alternately identical and orthogonal to each other.

29. A transmitting device for transmitting data symbols and pilot symbols in an OFDM communication system having a plurality of transmission antennas, the device comprising:

a symbol generator that generates said data symbols and said pilot symbols, wherein said symbol generator generates first pilot symbols and second pilot symbols, wherein said first pilot symbols and second pilot symbols are of the same type, and wherein some of said first and second pilot symbols in the time as well as in the frequency dimension are identical to each other and some of said first and second pilot symbols in the time as well as in the frequency dimension are respectively orthogonal to each other; and

a transmitter that transmits said data symbols and pilot symbols respectively by using a plurality of subcarriers and timeslots of said OFDM transmission system, wherein a first transmission antenna of said plurality of transmission antennas transmits said first pilot symbols and a second transmission antenna of said plurality of transmission antennas transmits said second pilot symbols, and wherein said first and second pilot symbols are respectively transmitted in the same timeslots and the same subcarriers of the OFDM communication system,

wherein at least some of the first and second pilot symbols have the same frequency allocation and are alternately identical and orthogonal to each other.

30. A transmitting device according to claim 28 or 29 ,

wherein said first and second pilot symbols are alternately identical and orthogonal to each other in the frequency as well as in the time dimension.