Matsushita Electric Industrial Co., Ltd.

Ntt Mobile Communications Network, Inc.

Matsushita Communication Industrial Co., Ltd.

Kazuhiro Umetsu

Tadao Takami

Kazuhisa Tsubaki

Tetsuaki Nakanishi

Keiichi Ikawa

In a CDMA receiver, an A/D converter over-samples an analog reception baseband signal with a sampling clock a frequency of which is 2,times higher than a chip clock, and converts it into a digital reception baseband signal. A correlator obtains a correlation value between the digital reception baseband signal and a pilot spreading code which is synchronous with a reception timing. A phase difference detecting unit obtains a phase difference between the digital reception baseband signal and the reception timing based on the correlation value. A timing controlling unit changes the reception timing in such a manner as to eliminate the phase difference obtained by the phase difference detecting unit.

CDMA receiver

A data receiving apparatus is constructed to make comparison of received signal strength of a plurality of receiving antennas by making use of timing of a sync word, which is not necessary for making synchronization acquisition, among a plurality of sync words contained in a subframe of a receiving signal, and then to select a receiving antenna of the highest received signal strength from among the plurality of receiving antennas, in accordance with a result of the comparison made before then.

Data receiving apparatus

Growing community of inventors

Yokohama, Japan

Kazuhiro Umetsu