Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2007-09-18
2007-09-18
Tse, Young T. (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S340000, C370S347000
Reexamination Certificate
active
11165957
ABSTRACT:
A correction method for time varying channels in a time slot division mobile communication system that includes: performing channel estimation and signal detection for a time-slot or burst signal received with a time invariant block processing method; estimating the channel deviation by using the detection result of some symbols that are near the channel estimation code; correcting the channel estimation with the estimated channel deviation; and demodulating the said detection result with the corrected channel estimation. The procedure can be carried out once or for a plurality of times. This correction method is adaptive to a certain degree of varying of the channel response within a time-slot while keeping the basic characteristics of the block processing method, softening the terms of application thereof in a time-slot CDMA system or similar block processing systems and improving the performance of system under the circumstances of larger frequency deviation and shift as well as higher moving speed of a terminal.
REFERENCES:
patent: 6002716 (1999-12-01), Meyer et al.
patent: 6452917 (2002-09-01), Leung
patent: 6504884 (2003-01-01), Zvonar
patent: 6700919 (2004-03-01), Papasakellariou
patent: 2003/0031238 (2003-02-01), Li et al.
patent: 2004/0033791 (2004-02-01), Schmidl et al.
patent: 1353888 (2002-06-01), None
patent: 2003-69530 (2003-03-01), None
patent: WO 02/096049 (2002-11-01), None
International Search Report in PCT/CN03/01132 dated Apr. 1, 2004.
“Zero Forcing and Minimum Mean-Square-Error Equalization for Multiuser Detection in Code-Division Multiple-Access Channels”, Klein et al. IEEE Transactions on Vehicular Technology, vol. 45, No. 2, 1996, pp. 276-287.
“Comparative Study of Joint-Detection Techniques for TS-CDMA Based Mobile Radio Systems”, Vollmer et al. IEEE Journal On Selected Areas in Communications, vol. 19, No. 8, 2001, pp. 1461-1475.
Da Tang Mobile Communication Equipment Co., Ltd.
Marshall & Gerstein & Borun LLP
Tse Young T.
LandOfFree
Correction method for time-varying channel in a time-slot... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Correction method for time-varying channel in a time-slot..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Correction method for time-varying channel in a time-slot... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3750090