US 6,549,527 B1 · Radio receiver and despreader

Abstract

A radio receiver for improving transmission performance by applying prescribed processing to received signals having reached to plural antennas concurrently, and a despreader to be mounted in the radio receiver. In such a radio receiver, the received signals are decimation-sampled, and multiplexed into a multiple-signal, which is demultiplexed and prediction processed for interpolating the values decimated in the sampling. In the despreader, the transfer functions and despreading codes are multiplied in real time, and interpolation processing and despreading processing are performed based on the filtering characteristics set as the results of the multiplication. In a radio transmission system to which the present invention is applied, it becomes possible to perform all of desired synthetic processing, phase scanning, frequency scanning and feeding point scanning adaptive to an array antenna system, without lowering the performance of the system or increasing the scale and the price of the hardware.

Claims15

Dependent claims

A radio receiver comprising:

a plurality N of decimation means for sampling received signals having reached concurrently to a plurality N of antennas respectively in baseband domain thereof at a plurality N of different phases and at a frequency of twice or more than the occupied bandwidth thereof and generating a plurality N of discrete signals individually corresponding to the received signals;
multiplexing means for multiplexing said plurality N of discrete signals are outputting a multiple-signal;
demultiplexing means for demultiplexing said multiple-signal and restoring said plurality N of discrete signals;
and
a plurality N of prediction means for predicting instantaneous values thereof individually at a common time point given from the outside or set in advance and generating baseband signals respectively showing said received signals, concerning said plurality N of discrete signals restored by said demultiplexing means.

2 more elements

Dependencies are inferred from the claim text.

Radio receiver and despreader

Life of this patent

Radio receiver and despreader

Life of this patent

Abstract

Claims15