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, the transmitting device configured to:

generate said data symbols and said pilot symbols; and

transmit said data symbols and pilot symbols using a plurality of subcarriers of said OFDM transmission system, wherein

said generating said pilot symbols includes selectively generating a first type pilot symbol and a second type pilot symbol being orthogonal to said first type pilot symbol so that a pilot symbol pattern in a frequency dimension comprises at least said first type pilot symbol to be transmitted using a predefined subcarrier and the second type pilot symbol to be transmitted using another predefined subcarrier,

said pilot symbol pattern has a different pattern in a time dimension from a succeeding pilot symbol pattern, and

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

2. A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system, the transmitting device configured to:

generate said data symbols and said pilot symbols; and

transmit said data symbols and pilot symbols respectively using a plurality of subcarriers of said OFDM transmission system, wherein

said generating said pilot symbols includes selectively generating a first type pilot symbol and a second type pilot symbol being orthogonal to said first type pilot symbol so that a pilot symbol pattern in a frequency dimension comprises at least said first type pilot symbol to be transmitted using a predefined subcarrier and the second type pilot symbol to be transmitted using another predefined subcarrier,

said pilot symbol pattern has a different pattern in a time dimension from a succeeding pilot symbol pattern, and

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

3. The transmitting device according to claim 1 or 2 , wherein

corresponding first and second pilot symbols have the same frequency and time allocation in the OFDM system.

4. The transmitting device according to claim 3 , wherein

corresponding first and second pilot symbols having the same frequency and time allocation are alternatingly identical and orthogonal to each other in the frequency as well as in the time dimension.

5. The transmitting device according to claim 1 , wherein

the first and the second pilot symbols have a regular distribution in the time and the frequency dimension, whereby the second pilot symbols alternately have identical and inverse complex value of the corresponding first pilot symbol in the time as well as in the frequency dimension.

6. A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system, the transmitting device configured to:

generate said data symbols and said pilot symbols; and

transmit said data symbols and pilot symbols using a plurality of subcarriers of said OFDM transmission system, wherein

said generating said pilot symbols includes selectively generating a first type pilot symbol and a second type pilot symbol being orthogonal to said first type pilot symbol so as to create a pilot symbol pattern in which said first and second type pilot symbols are allocated respectively in a frequency dimension,

said pilot symbol pattern has a different pattern in a time dimension from a succeeding pilot symbol pattern, and

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

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

generate said data symbols and said pilot symbols; and

transmit said data symbols and pilot symbols using a plurality of subcarriers of said OFDM transmission system, wherein

said generating said pilot symbols includes selectively generating a first type pilot symbol and a second type pilot symbol being orthogonal to said first type pilot symbol so as to create a pilot symbol pattern in which said first and second type pilot symbols are allocated respectively in a frequency dimension,

said pilot symbol pattern has a different pattern in a time dimension from a succeeding pilot symbol pattern, and

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

8. The transmitting device according to claim 6 or 7 , wherein

corresponding first and second pilot symbols have the same frequency and time allocation in the OFDM system.

9. The transmitting device according to claim 8 , wherein

corresponding first and second pilot symbols having the same frequency and time allocation are alternatingly identical and orthogonal to each other in the frequency as well as in the time dimension.

10. The transmitting device according to claim 6 or 7 , wherein

the first and the second pilot symbols have a regular distribution in the time and the frequency dimension, whereby the second pilot symbols alternately have identical and inverse complex value of the corresponding first pilot symbol in the time as well as in the frequency dimension.

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

generate said data symbols and said pilot symbols; and

transmit said data symbols and pilot symbols using a plurality of subcarriers of said OFDM transmission system, wherein

said generating said pilot symbols includes regularly allocating either a first type pilot symbol or a second type pilot symbol being orthogonal to said first type pilot symbol in a frequency dimension to said generated pilot symbols, and

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 a same time allocation and being alternately identical and orthogonal to each other.

12. A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system, the transmitting device configured to:

generate said data symbols and said pilot symbols; and

transmit said data symbols and pilot symbols using a plurality of subcarriers of said OFDM transmission system, wherein

said generating said pilot symbols includes regularly allocating either a first type pilot symbol or a second type pilot symbol being orthogonal to said first type pilot symbol in a frequency dimension to said generated pilot symbols, and

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 a same frequency allocation and being alternately identical and orthogonal to each other.

13. The transmitting device according to claim 11 or 12 , wherein

corresponding first and second pilot symbols have the same frequency and time allocation in the OFDM system.

14. The transmitting device according to claim 13 , wherein

corresponding first and second pilot symbols having the same frequency and time allocation are alternatingly identical and orthogonal to each other in the frequency as well as in the time dimension.

15. The transmitting device according to claim 11 or 12 , wherein

the first and the second pilot symbols have a regular distribution in the time and the frequency dimension, whereby the second pilot symbols alternately have identical and inverse complex value of the corresponding first pilot symbol in the time as well as in the frequency dimension.

16. A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system, the transmitting device configured to:

generate said data symbols and said pilot symbols; and

transmit said data symbols and pilot symbols respectively using a plurality of subcarriers of said OFDM transmission system, wherein

said generating said pilot symbols includes selectively generating 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 in a time dimension comprises at least said first and second type pilot symbols to be transmitted at different timepoints respectively,

a first pilot symbol pattern to be transmitted using one of said plurality of subcarriers is different from a second pilot symbol pattern to be transmitted using an adjacent subcarrier, and

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 a 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, the transmitting device configured to:

generate said data symbols and said pilot symbols; and

transmit said data symbols and pilot symbols respectively using a plurality of subcarriers of said OFDM transmission system, wherein

said generating said pilot symbols includes selectively generating 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 in a time dimension comprises at least said first and second type pilot symbols to be transmitted at different timepoints respectively,

a first pilot symbol pattern to be transmitted using one of said plurality of subcarriers is different from a second pilot symbol pattern to be transmitted using an adjacent subcarrier, and

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 a same frequency allocation and being alternately identical and orthogonal to each other.

18. The transmitting device according to claim 16 or 17 , wherein

corresponding first and second pilot symbols have the same frequency and time allocation in the OFDM system.

19. The transmitting device according to claim 18 , wherein

corresponding first and second pilot symbols having the same frequency and time allocation are alternatingly identical and orthogonal to each other in the frequency as well as in the time dimension.

20. The transmitting device according to claim 16 or 17 , wherein

the first and the second pilot symbols have a regular distribution in the time and the frequency dimension, whereby the second pilot symbols alternately have identical and inverse complex value of the corresponding first pilot symbol in the time as well as in the frequency dimension.

21. A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system, the transmitting device configured to:

generate said data symbols and said pilot symbols; and

transmit said data symbols and pilot symbols using a plurality of subcarriers of said OFDM transmission system, wherein

said generating said pilot symbols includes selectively generating a first type pilot symbol and a second type pilot symbol being orthogonal to said first type pilot symbol so as to create a first pilot symbol pattern in which said first and second type pilot symbols are allocated regularly in a time dimension,

said first pilot symbol pattern to be transmitted using one of said plurality of subcarriers is different from a second pilot symbol pattern to be transmitted using an adjacent subcarrier, and

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 a same time allocation and being alternately identical and orthogonal to each other.

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

generate said data symbols and said pilot symbols; and

transmit said data symbols and pilot symbols using a plurality of subcarriers of said OFDM transmission system, wherein

said generating said pilot symbols includes selectively generating a first type pilot symbol and a second type pilot symbol being orthogonal to said first type pilot symbol so as to create a first pilot symbol pattern in which said first and second type pilot symbols are allocated regularly in a time dimension,

said first pilot symbol pattern to be transmitted using one of said plurality of subcarriers is different from a second pilot symbol pattern to be transmitted using an adjacent subcarrier, and

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 a same frequency allocation and being alternately identical and orthogonal to each other.

23. The transmitting device according to claim 21 or 22 , wherein

corresponding first and second pilot symbols have the same frequency and time allocation in the OFDM system.

24. The transmitting device according to claim 23 , wherein

corresponding first and second pilot symbols having the same frequency and time allocation are alternatingly identical and orthogonal to each other in the frequency as well as in the time dimension.

25. The transmitting device according to claim 21 or 22 , wherein

the first and the second pilot symbols have a regular distribution in the time and the frequency dimension, whereby the second pilot symbols alternately have identical and inverse complex value of the corresponding first pilot symbol in the time as well as in the frequency dimension.

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

generate said data symbols and said pilot symbols; and

transmit said data symbols and pilot symbols using a plurality of subcarriers of said OFDM transmission system, wherein

a first pilot symbol pattern, in which a first type pilot symbol and a second type pilot symbol being orthogonal to said first type pilot symbol are allocated in a time dimension, to be transmitted using one of said plurality of subcarriers is different from a second pilot symbol pattern to be transmitted using an adjacent subcarrier, and

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 a same time allocation and being alternately identical and orthogonal to each other.

27. A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system, the transmitting device configured to:

generate said data symbols and said pilot symbols; and

transmit said data symbols and pilot symbols using a plurality of subcarriers of said OFDM transmission system, wherein

a first pilot symbol pattern, in which a first type pilot symbol and a second type pilot symbol being orthogonal to said first type pilot symbol are allocated in a time dimension, to be transmitted using one of said plurality of subcarriers is different from a second pilot symbol pattern to be transmitted using an adjacent subcarrier, and

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 a same frequency allocation and being alternately identical and orthogonal to each other.

28. The transmitting device according to claim 26 or 27 , wherein

corresponding first and second pilot symbols have the same frequency and time allocation in the OFDM system.

29. The transmitting device according to claim 28 , wherein

corresponding first and second pilot symbols having the same frequency and time allocation are alternatingly identical and orthogonal to each other in the frequency as well as in the time dimension.

30. The transmitting device according to claim 26 or 27 , wherein

the first and the second pilot symbols have a regular distribution in the time and the frequency dimension, whereby the second pilot symbols alternately have identical and inverse complex value of the corresponding first pilot symbol in the time as well as in the frequency dimension.