Granted Patent B2

US 8,867,647 · App. 13/709,841 · Granted Oct 21, 2014

Abstract

Claims (45)

1. A diversity transmission method for transmitting spatially multiplexed channel on multiple antennas, comprising:

receiving an indication of a spreading sequence;

encoding a block of information bits to form channel coded bits, wherein the ratio R 2 of the number of channel coded bits to the number of information bits is greater than one;

mapping the channel coded bits to modulation symbols, wherein each channel coded bit is respectively mapped to a single modulation symbol;

multiplexing the modulation symbols to the multiple antennas;

spreading the modulation symbols to be transmitted on a first antenna of the multiple antennas with the spreading sequence;

spreading the modulation symbols to be transmitted on a second antenna of the multiple antennas with the spreading sequence; and

transmitting the spread modulation symbols on the antennas to which they were multiplexed.

2. The method of claim 1 , wherein the number of information bits is always less than or equal to a second number of channel coded bits, and the second number of channel coded bits is a number of bits mapped to the modulation symbols multiplexed to an antenna of the multiple antennas.

3. The method of claim 1 , wherein the block of information bits does not contain error detection bits derived from the information bits.

4. The method of claim 1 , wherein a single antenna transmission mode is additionally supported, comprising:

transmitting on one antenna in the single antenna transmission mode of operation producing a second set of channel coded bits, wherein a second number of information bits in the single antenna transmission mode is the same as the number of information bits, and a third number of channel coded bits is produced, and the ratio of the third number of channel coded bits to the number of information bits is R 1 , and the ratio of R 2 to R 1 is greater than one, and all of the third set of channel coded bits are the same as a portion of the channel coded bits.

5. The method of claim 1 , wherein the step of encoding a block of information bits further comprises encoding the information bits using an extended channel code derived from a base channel code, wherein a portion of the channel coded bits is generated by:

encoding the information bits using the base channel code to form base channel coded bits;

repeating a portion of the base channel coded bits generated using the base channel code to form repeated channel coded bits; and

multiplying the repeated channel coded bits by a sequence to form the portion of the channel coded bits.

6. The method of claim 3 , wherein the block of information bits does not contain cyclic redundancy check bits.

7. A diversity transmission method for transmitting a spatially multiplexed channel on multiple antennas, comprising:

receiving an indication of a plurality of spreading sequences;

encoding a block of information bits to form channel coded bits, wherein the ratio R 2 of the number of channel coded bits to the number of information bits is greater than one;

mapping the channel coded bits to modulation symbols, wherein each channel coded bit is respectively mapped to a single modulation symbol;

multiplexing the modulation symbols to the multiple antennas;

spreading the modulation symbols to be transmitted on a first antenna of the multiple antennas with one of the indicated spreading sequences;

spreading the modulation symbols to be transmitted on a second antenna of the multiple antennas with a second one of the indicated spreading sequences, wherein the second one of the spreading sequences may be the same as the first spreading sequence; and

transmitting the spread modulation symbols on the antennas to which they were multiplexed.

8. The method of claim 7 , wherein the number of information bits is always less than or equal to a second number of channel coded bits, and the second number of channel coded bits is a number of bits mapped to the modulation symbols multiplexed to an antenna of the multiple antennas.

9. The method of claim 7 , wherein an equal number of symbols is multiplexed to each of the multiple antennas.

10. The method of claim 7 , wherein the block of information bits does not contain error detection bits derived from the information bits.

11. A system for transmitting a spatially multiplexed channel on multiple antennas in a multi-antenna transmission mode, comprising:

a processor configured such that the processor encodes a block of information bits to form channel coded bits, wherein the ratio of the number of channel coded bits to the number of information bits is greater than one; and the processor maps the channel coded bits to modulation symbols, and each channel coded bit is respectively mapped to a single modulation symbol; and

a transmitter configured to transmit a first portion of the modulation symbols using a spreading sequence on a first antenna of the multiple antennas and to transmit a second portion of the modulation symbols using the spreading sequence on a second antenna of the multiple antennas.

12. The system of claim 11 , wherein the number of information bits is always less than or equal to a second number of channel coded bits, and the second number of channel coded bits is a number of bits mapped to the modulation symbols transmitted on an antenna of the multiple antennas.

13. The system of claim 11 , wherein the block of information bits does not contain error detection bits derived from the information bits.

14. The system of claim 11 , wherein the ratio of the number of channel coded bits to the number of information bits is at least a number of transmit antennas to be transmitted upon.

15. The system of claim 11 , wherein the system receives an indication of the spreading sequence.

16. The system of claim 11 , wherein the processor multiplexes the modulation symbols to the multiple antennas to form the first and second portions of the modulation symbols, and wherein the number of symbols in the first and second portions are equal.

17. The system of claim 11 , wherein a single antenna transmission mode is additionally supported, comprising the transmitter transmitting on one antenna in the single antenna transmission mode of operation producing a second set of channel coded bits, wherein a second number of information bits in the single antenna transmission mode is the same as the number of information bits, and a third number of channel coded bits is produced, and the ratio of the third number of channel coded bits to the number of information bits is R 1 , and the ratio of R 2 to R 1 is greater than one, and all of the second set of channel coded bits are the same as a portion of the channel coded bits.

18. The system of claim 11 , wherein the step of encoding a block of information bits further comprises encoding the information bits using an extended channel code derived from a base channel code, wherein a portion of the channel coded bits is generated by:

encoding the information bits using the base channel code to form base channel coded bits;

repeating a portion of the base channel coded bits generated using the base channel code and to form repeated channel coded bits; and

multiplying the repeated channel coded bits by a sequence to form the portion of the channel coded bits.

19. The system of claim 11 , wherein the step of encoding a block of information bits further comprises encoding the information bits using an extended block code derived from a base block code, wherein a portion of the channel coded bits is generated by encoding the information bits with an extended portion of the base block code, wherein the base block code comprises a matrix with K rows, and wherein the extended portion of the base block code comprises a matrix with L rows and a first submatrix with L rows and M columns and a second submatrix with L rows and N columns such that M+N is equal to the number of columns of the base block code, and wherein M is greater than or equal to log 2 (K), and wherein the rank of the first submatrix is less than the minimum of L and M.

20. The system of claim 17 , wherein the system is a component of a user equipment configured to receive from an evolved node B at least one of:

an indication of a spreading sequence; and

an indication to the user equipment to transmit in one of the single antenna transmission mode and the multi-antenna transmission mode.

Assignments (10)