Apparatus and method for performing channel estimations...

Details Apparatus and method for performing channel estimations... Apparatus and method for performing channel estimations...

2007-02-20

2007-02-20

Moe, Aung (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

C455S464000

Reexamination Certificate

active

10737223

ABSTRACT:
A channel estimation apparatus for WCDMA mobile communication terminal is disclosed. The channel estimation apparatus includes a moving average filter for calculating the average value of pilot signals; an interpolator for computing a tentative estimation value of channel variation by using linear interpolation algorithms based on the average value of pilot signal; a channel compensator for compensating a channel variable of the data signal delayed in a predetermined time based on the tentative estimation value of channel variation; a decision block unit for tentatively determining data signal based on the compensated data signals; a raw channel estimator for computing a raw channel estimation value based on the output signal of the decision block unit and the data signal delayed; and a non-linear filter for computing a final channel estimation value of channel variation based on the tentative estimation value of channel variation and the raw channel estimation value.

REFERENCES:
patent: 6192040 (2001-02-01), Jalloul et al.
patent: 6304624 (2001-10-01), Seki et al.
patent: 6452917 (2002-09-01), Leung
patent: 6947475 (2005-09-01), Sendonaris et al.
patent: 2003/0108135 (2003-06-01), Frigon
patent: 2000-7189 (2000-02-01), None
patent: 2001-54456 (2001-07-01), None
Jung-Keun Park, et al., “A Channel Estimation Technique for WCDMA Systems”, IEICE Trans. Commun., vol. E86-B, No. 4, Apr. 2003.
Jung-Keun Park, “A New Channel Estimation Technique Using Plot Symbols”, Electric Engineering and Computer Science in Hanyang University, Dec. 2002, Only Abstract in English.

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