Channel estimation in CDMA communications systems using both...

Details Channel estimation in CDMA communications systems using both... Channel estimation in CDMA communications systems using both...

2001-05-23

2008-05-27

Phu, Phuong (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S348000, C375S350000, C375S232000, C375S148000

Reexamination Certificate

active

07379513

ABSTRACT:
An iterative arrangement of channel estimator (12), a Kalman filter unit (14), and a soft demodulator (16) is provided for producing an estimate of complex gain of a CDMA communications channel carrying data and pilot channels, and demodulated data of the data channel. An initial channel estimate is produced by the estimator (12) using only the low-power pilot channel. This later is improved by the iterative process using the data channel. The complex gains is represented by a sum of sinusoidal signals with different frequencies and randomly variable amplitude and phase.

REFERENCES:
patent: 6614857 (2003-09-01), Buehrer et al.
patent: 6791960 (2004-09-01), Song
patent: 6937642 (2005-08-01), Hirata
patent: 2002/0167913 (2002-11-01), Leung
E.F. Casas and C. Leung, “A Simple Digital Fading Simulator for Mobile Radio”, CH2622-9/88/0000-0212 1988 IEEE, pp. 212-217.

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