Claims
- 1. An apparatus for a communication system, comprising:
a decover element for decovering a plurality of received samples to provide decovered half-symbols, wherein the decover element is configured to perform decovering with a decovering channelization symbol having a length (T) that is half the length (2T) of a covering channelization symbol used to cover the received samples; and a first multiplier for receiving the decovered half-symbols and pilot symbols to provide demodulated half-symbols.
- 2. The apparatus of claim 1, wherein the received samples are despread received samples, further comprising:
a second multiplier for producing the despread received samples.
- 3. The apparatus of claim 1, further comprising:
a combiner for combining the demodulated half-symbols received from the first multiplier.
- 4. The apparatus of claim 3, wherein the combiner comprises:
a first accumulator for accumulating the demodulated half-symbols corresponding to a first half of a symbol period; and a second accumulator for accumulating the demodulated half-symbols corresponding to a second half of the symbol period.
- 5. The apparatus of claim 1, further comprising:
a switch for selectively outputting the demodulated half-symbols corresponding to a first half of the symbol period and the demodulated half-symbols corresponding to a second half of the symbol period.
- 6. An apparatus for a communication system, comprising:
a first and second correlator, each correlator including
a decover element for decovering a plurality of received samples to provide decovered half-symbols, wherein the decover element is configured to perform decovering with a decovering channelization symbol having a length (T) that is half the length (2T) of a covering channelization symbol used to cover the received samples; a first multiplier for receiving the decovered half-symbols and pilot symbols to provide demodulated half-symbols; and a switch for selectively sending a demodulated half-symbol along a first signal path during a first half of a symbol period and an inverted demodulated half-symbol along a second signal path during a second half of the symbol period.
- 7. The apparatus of claim 6, wherein the received samples are despread samples, and further comprising:
a second multiplier for producing the despread received samples.
- 8. The apparatus of claim 6, further comprising:
a conjugator for conjugating the demodulated half-symbols along the second signal path.
- 9. The apparatus of claim 6, further comprising:
a combiner for combining the demodulated half-symbols received from the first and second signal paths of the respective first and second correlators.
- 10. The apparatus of claim 9, wherein the combiner comprises:
a first accumulator for accumulating the demodulated half-symbols along the first signal path of the first correlator and the second signal path of the second correlator; and a second accumulator for accumulating the demodulated half-symbols along the second signal path of the first correlator and the first signal path of the second correlator.
- 11. An apparatus for a communication system, comprising:
a first and second correlator, each correlator including
a decover element for decovering a plurality of received samples to provide decovered half-symbols, wherein the decover element is configured to perform decovering with a decovering channelization symbol having a length (T) that is half the length (2T) of a covering channelization symbol used to cover the received samples; a switch for selectively outputting the decovered half-symbols corresponding to a first half of a symbol period along a first signal path and decovered half-symbols corresponding to a second half of the symbol period along a second signal path; first and second summers, respectively coupled to the first and second signal paths, for combining each pair of decovered half-symbols to provide a respective decovered symbol; and first and second multipliers for receiving the decovered symbols and pilot symbols to provide demodulated symbols.
- 12. The apparatus of claim 11, wherein the received samples are despread received samples, said first and second correlator further including:
a third multiplier for producing the despread received samples.
- 13. The apparatus of claim 11, further comprising:
a conjugator for conjugating the decovered symbols along the second signal path of the first correlator and the first signal path of the second correlator.
- 14. The apparatus of claim 11, further comprising:
a delay element for delaying the decovered half-symbols along the first signal path.
- 15. The apparatus of claim 14, further comprising:
a combiner for combining the demodulated symbols received from the first and second correlators.
- 16. The apparatus of claim 15, wherein the combiner comprises:
a first accumulator for accumulating the demodulated symbols from the first multiplier of the first and second correlators; and a second accumulator for accumulating the demodulated symbols from the second multiplier of the first and second correlators.
- 17. A communication system, comprising:
a transmitter; and a receiver for processing a received signal transmitted from the transmitter, said receiver including:
a decover element for decovering a plurality of received samples to provide decovered half-symbols, wherein the decover element is configured to perform decovering with a decovering channelization symbol having a length (T) that is half the length (2T) of a covering channelization symbol used to cover the received samples; and a first multiplier for receiving the decovered half-symbols and pilot symbols to provide demodulated half-symbols.
- 18. The communication system of claim 17, wherein the received samples are despread received samples, further comprising:
a second multiplier for producing the despread received samples.
- 19. The communication system of claim 17, further comprising:
a combiner for combining the demodulated half-symbols received from the first multiplier.
- 20. The communication system of claim 19, wherein the combiner comprises:
a first accumulator for accumulating the demodulated half-symbols corresponding to a first half of a symbol period; and a second accumulator for accumulating the demodulated half-symbols corresponding to a second half of the symbol period.
- 21. The communication system of claim 17, further comprising:
a switch for selectively outputting the demodulated half-symbols corresponding to a first half of the symbol period and the demodulated half-symbols corresponding to a second half of the symbol period.
- 22. A communication system, comprising:
a transmitter; and a receiver for processing a received signal transmitted from the transmitter, said receiver including:
a first and second correlator, each correlator including
a decover element for decovering a plurality of received samples to provide decovered half-symbols, wherein the decover element is configured to perform decovering with a decovering channelization symbol having a length (T) that is half the length (2T) of a covering channelization symbol used to cover the received samples; a first multiplier for receiving the decovered half-symbols and pilot symbols to provide demodulated half-symbols; and a switch for selectively sending a demodulated half-symbol along a first signal path during a first half of a symbol period and an inverted demodulated half-symbol along a second signal path during a second half of the symbol period.
- 23. The communication system of claim 22, wherein the received samples are despread samples, and further comprising:
a second multiplier for producing the despread received samples.
- 24. The communication system of claim 22, further comprising:
a conjugator for conjugating the demodulated half-symbols along the second signal path.
- 25. The communication system of claim 22, further comprising:
a combiner for combining the demodulated half-symbols received from the first and second signal paths of the respective first and second correlators.
- 26. The communication system of claim 25, wherein the combiner comprises:
a first accumulator for accumulating the demodulated half-symbols along the first signal path of the first correlator and the second signal path of the second correlator; and a second accumulator for accumulating the demodulated half-symbols along the second signal path of the first correlator and the first signal path of the second correlator.
- 27. A communication system, comprising:
a transmitter; and a receiver for processing a received signal transmitted from the transmitter, said receiver including:
a first and second correlator, each correlator including
a decover element for decovering a plurality of received samples to provide decovered half-symbols, wherein the decover element is configured to perform decovering with a decovering channelization symbol having a length (T) that is half the length (2T) of a covering channelization symbol used to cover the received samples; a switch for selectively outputting the decovered half-symbols corresponding to a first half of a symbol period along a first signal path and decovered half-symbols corresponding to a second half of the symbol period along a second signal path; first and second summers, respectively coupled to the first and second signal paths, for combining each pair of decovered half-symbols to provide a respective decovered symbol; and first and second multipliers for receiving the decovered symbols and pilot symbols to provide demodulated symbols.
- 28. The communication system of claim 27, wherein the received samples are despread received samples, said first and second correlator further including:
a third multiplier for producing the despread received samples.
- 29. The communication system of claim 27, further comprising:
a conjugator for conjugating the decovered symbols along the second signal path of the first correlator and the first signal path of the second correlator.
- 30. The communication system of claim 27, further comprising:
a delay element for delaying the decovered half-symbols along the first signal path.
- 31. The communication system of claim 27, further comprising:
a combiner for combining the demodulated symbols received from the first and second correlators.
- 32. The communication system of claim 31, wherein the combiner comprises:
a first accumulator for accumulating the demodulated symbols from the first multiplier of the first and second correlators; and a second accumulator for accumulating the demodulated symbols from the second multiplier of the first and second correlators.
- 33. A method for processing a received signal in a wireless communication system, comprising:
decovering a plurality of received samples to provide decovered half-symbols, wherein the decovering is performed with a decovering channelization symbol having a length (T) that is half the length (2T) of a covering channelization symbol used to cover the received samples; and receiving the decovered half-symbols and pilot symbols to provide demodulated half-symbols by a multiplier.
- 34. The method of claim 33, further comprising:
despreading the received samples.
- 35. The method of claim 33, further comprising:
combining the demodulated half-symbols received from the multiplier.
- 36. The method of claim 35, wherein said combining further comprises:
accumulating the demodulated half-symbols corresponding to a first half of a symbol period in a first accumulator; and accumulating the demodulated half-symbols corresponding to a second half of the symbol period in a second accumulator.
- 37. The method of claim 33, further comprising:
selectively outputting the demodulated half-symbols corresponding to a first half of the symbol period and the demodulated half-symbols corresponding to a second half of the symbol period.
CLAIM OF PRIORITY UNDER 35 U.S.C. §120
[0001] The present Application for Patent is a Continuation Application claiming priority to patent application Ser. No. 09/594,466 entitled “Method and Apparatus for Demodulating Signals Processed in a Transmit Diversity Mode” filed Jun. 14, 2000, having a common assignee with the present application and hereby expressly incorporated by reference herein.
Continuations (1)
|
Number |
Date |
Country |
Parent |
09594466 |
Jun 2000 |
US |
Child |
10651446 |
Aug 2003 |
US |