IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0193925
(2008-08-19)
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등록번호 |
US-8509293
(2013-08-13)
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발명자
/ 주소 |
- Sikri, Divaydeep
- Dede, Erdogan
- Abrishamkar, Farrokh
- Children, Philip J. C.
- De Laurentiis, Nico
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
7 인용 특허 :
26 |
초록
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A method for estimating timing in a wireless communication comprises the steps of receiving a plurality of symbol bursts corresponding to a plurality of time slots and selecting a subset of symbols from a first symbol burst of the plurality of symbol bursts. The subset comprises a first midamble sym
A method for estimating timing in a wireless communication comprises the steps of receiving a plurality of symbol bursts corresponding to a plurality of time slots and selecting a subset of symbols from a first symbol burst of the plurality of symbol bursts. The subset comprises a first midamble symbol. The method further comprises the steps of calculating, for each symbol in the subset, a corresponding midamble estimation error, and determining the lowest calculated midamble estimation error to determine a timing for the first symbol burst. The method further comprises the steps of processing the first symbol burst utilizing the timing determined for the first symbol burst, and processing a second symbol burst of the plurality of symbol bursts utilizing the timing determined for the first symbol burst.
대표청구항
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1. A method for estimating timing in a wireless communication by a receiver, comprising the steps of: receiving a plurality of symbol bursts corresponding to a plurality of time slots;selecting a subset of symbols from a first symbol burst of the plurality of symbol bursts, the subset comprising a f
1. A method for estimating timing in a wireless communication by a receiver, comprising the steps of: receiving a plurality of symbol bursts corresponding to a plurality of time slots;selecting a subset of symbols from a first symbol burst of the plurality of symbol bursts, the subset comprising a first midamble symbol;calculating, for each symbol in the subset, a corresponding midamble estimation error;determining the lowest calculated midamble estimation error to determine a timing for the first symbol burst;processing the first symbol burst utilizing the timing determined for the first symbol burst; andprocessing a second symbol burst of the plurality of symbol bursts utilizing the timing determined for the first symbol burst. 2. The method according to claim 1, wherein the calculating the midamble estimation error for each symbol in the subset comprises: determining an estimated channel corresponding to the symbol;performing single antenna interference cancellation on the estimated channel to obtain an estimated midamble sequence; andcomparing the estimated midamble sequence with a previously-known midamble sequence to determine the midamble estimation error. 3. The method according to claim 2, wherein the calculating the midamble estimation error for each symbol in the subset further comprises: performing single antenna interference cancellation on the estimated channel to obtain an estimated data sequence for the first symbol burst; andcomparing the estimated data sequence with a previously-determined data sequence to determine the midamble estimation error. 4. The method according to claim 2, wherein the determining the estimated channel corresponding to each symbol comprises selecting a predetermined number of adjacent symbols in the subset corresponding to a number of taps in the estimated channel. 5. The method according to claim 1, wherein the selecting a subset of the first symbol burst comprises estimating a position of the first midamble symbol in the first symbol burst and selecting a plurality of symbols centered around the estimated position. 6. The method according to claim 1, wherein the first symbol burst and the second symbol burst correspond to first and second time slots assigned to a single user. 7. A receiver comprising: an antenna configured to receive a plurality of symbol bursts corresponding to a plurality of time slots;a timing estimator configured to select a subset of symbols from a first symbol burst of the plurality of symbol bursts, the subset comprising a first midamble symbol;a midamble estimator configured to calculate, for each symbol in the subset, a corresponding midamble estimation error; anda processor configured to: determine the lowest calculated midamble estimation error to determine a timing for the first symbol burst,process the first symbol burst utilizing the timing determined for the first symbol burst, andprocess a second symbol burst of the plurality of symbol bursts utilizing the timing determined for the first symbol burst. 8. The receiver according to claim 7, wherein the midamble estimator is configured to calculate the midamble estimation error for each symbol in the subset by: determining an estimated channel corresponding to the symbol;performing single antenna interference cancellation on the estimated channel to obtain an estimated midamble sequence; andcomparing the estimated midamble sequence with a previously-known midamble sequence to determine the midamble estimation error. 9. The receiver according to claim 8, wherein the midamble estimator is further configured to calculate the midamble estimation error for each symbol in the subset by: performing single antenna interference cancellation on the estimated channel to obtain an estimated data sequence for the first symbol burst; andcomparing the estimated data sequence with a previously-determined data sequence to determine the midamble estimation error. 10. The receiver according to claim 8, wherein the processor is configured to determine the estimated channel corresponding to each symbol by selecting a predetermined number of adjacent symbols in the subset corresponding to a number of taps in the estimated channel. 11. The receiver according to claim 7, wherein the timing estimator is configured to select a subset of the first symbol burst by estimating a position of the first midamble symbol in the first symbol burst and selecting a plurality of symbols centered around the estimated position. 12. The receiver according to claim 7, wherein the first symbol burst and the second symbol burst correspond to first and second time slots assigned to a single user. 13. A receiver comprising: means for receiving a plurality of symbol bursts corresponding to a plurality of time slots;means for selecting a subset of symbols from a first symbol burst of the plurality of symbol bursts, the subset comprising a first midamble symbol;means for calculating, for each symbol in the subset, a corresponding midamble estimation error;means for determining the lowest calculated midamble estimation error to determine a timing for the first symbol burst;means for processing the first symbol burst utilizing the timing determined for the first symbol burst; andmeans for processing a second symbol burst of the plurality of symbol bursts utilizing the timing determined for the first symbol burst. 14. The receiver according to claim 13, wherein the means for calculating the midamble estimation error for each symbol in the subset comprise: means for determining an estimated channel corresponding to the symbol;means for performing single antenna interference cancellation on the estimated channel to obtain an estimated midamble sequence; andmeans for comparing the estimated midamble sequence with a previously-known midamble sequence to determine the midamble estimation error. 15. The receiver according to claim 14, wherein the means for calculating the midamble estimation error for each symbol in the subset further comprise: means for performing single antenna interference cancellation on the estimated channel to obtain an estimated data sequence for the first symbol burst; andmeans for comparing the estimated data sequence with a previously-determined data sequence to determine the midamble estimation error. 16. The receiver according to claim 14, wherein the means for determining the estimated channel corresponding to each symbol comprise means for selecting a predetermined number of adjacent symbols in the subset corresponding to a number of taps in the estimated channel. 17. The receiver according to claim 13, wherein the means for selecting a subset of the first symbol burst comprise means for estimating a position of the first midamble symbol in the first symbol burst and means for selecting a plurality of symbols centered around the estimated position. 18. The receiver according to claim 13, wherein the first symbol burst and the second symbol burst correspond to first and second time slots assigned to a single user. 19. A non-transitory machine-readable medium comprising instructions for estimating timing in a wireless communication, the instructions comprising code for: receiving a plurality of symbol bursts corresponding to a plurality of time slots;selecting a subset of symbols from a first symbol burst of the plurality of symbol bursts, the subset comprising a first midamble symbol;calculating, for each symbol in the subset, a corresponding midamble estimation error;determining the lowest calculated midamble estimation error to determine a timing for the first symbol burst;processing the first symbol burst utilizing the timing determined for the first symbol burst; andprocessing a second symbol burst of the plurality of symbol bursts utilizing the timing determined for the first symbol burst. 20. The non-transitory machine-readable medium according to claim 19, wherein the code for calculating the midamble estimation error for each symbol in the subset comprises code for: determining an estimated channel corresponding to the symbol;performing single antenna interference cancellation on the estimated channel to obtain an estimated midamble sequence; andcomparing the estimated midamble sequence with a previously-known midamble sequence to determine the midamble estimation error. 21. The non-transitory machine-readable medium according to claim 20, wherein the code for calculating the midamble estimation error for each symbol in the subset further comprises code for: performing single antenna interference cancellation on the estimated channel to obtain an estimated data sequence for the first symbol burst; andcomparing the estimated data sequence with a previously-determined data sequence to determine the midamble estimation error. 22. The non-transitory machine-readable medium according to claim 20, wherein the code for determining the estimated channel corresponding to each symbol comprises code for selecting a predetermined number of adjacent symbols in the subset corresponding to a number of taps in the estimated channel. 23. The non-transitory machine-readable medium according to claim 19, wherein the code for selecting a subset of the first symbol burst comprises code for estimating a position of the first midamble symbol in the first symbol burst and code for selecting a plurality of symbols centered around the estimated position. 24. The non-transitory machine-readable medium according to claim 19, wherein the first symbol burst and the second symbol burst correspond to first and second time slots assigned to a single user.
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