CDMA pilot assisted channel estimation

Details CDMA pilot assisted channel estimation CDMA pilot assisted channel estimation

2006-12-12

2006-12-12

Bayard, Emmanuel (Department: 2611)

Pulse or digital communications

Receivers

Interference or noise reduction

C375S130000, C375S136000

Reexamination Certificate

active

07149264

ABSTRACT:
A pilot assisted channel estimation process. A receiver may be configured to estimate the impulse response of a channel from a signal having pilot tones and spread-spectrum pilot signals. The receiver estimates the response of the channel from the pilot tones, and adapts the length of delay the channel response is estimated based on the spread-spectrum pilot signals.

REFERENCES:
patent: 2004/0228267 (2004-11-01), Agrawal et al.
patent: 2005/0063345 (2005-03-01), Wu et al.
patent: 2006/0018279 (2006-01-01), Agrawal et al.
Tang, Haiyun et al., “Interpolation-based maximum likelihood channel estimation using OFDM pilot symbols”, Globecom'02, 2002—IEEE Global Telecommunications Conference, New York, NY: IEEE, US, vol. 1 of 3, Nov. 17, 2002, pp. 1860-1864.
Copy of PCT International Search Report (4 pgs.).

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