Reception timing detection circuit of CDMA receiver and detectio

Details Reception timing detection circuit of CDMA receiver and detectio Reception timing detection circuit of CDMA receiver and detectio

1997-07-14

1999-11-09

Kizou, Hassan

Multiplex communications

Communication over free space

Combining or distributing information via code word channels...

370335, 375208, 375210, 375343, H04B 7126, H04B 1500, H04L 2714

Patent

active

059827637

ABSTRACT:
A reception timing detection circuit of a CDMA receiver comprises an A/D converter 101 for obtaining a digital reception signal S, a correlator 102 for obtaining a cross-correlation between the digital reception signal S and a known signal series periodically within a predetermined lag, an interpolation filter 103 for re-sampling the signal R output from the correlator 102 at a frequency higher than a sampling frequency for the A/D converter 101, a power calculation section 104 for obtaining the re-sampled cross-correlation signal power P, an averaging section 105 for averaging the cross-correlation signal power P over a plurality of cycles, and a peak detection section 106 for obtaining a peak Popt of the averaged cross-correlation signal power P and determining an optimum reception timing .tau. opt.

REFERENCES:
patent: 5554156 (1996-09-01), Teder et al.
patent: 5799038 (1998-08-01), Nowara et al.
patent: 5838672 (1998-11-01), Ranta
patent: 5896423 (1999-04-01), Okamoto
patent: 5898665 (1999-04-01), Sawahashi et al.

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