MATCHED FILTER AND SPREAD SPECTRUM RECEIVER

摘要

The invention relates to a matched filter (6-10) for implementing the correlation of an input signal (6-21) and a reference signal (6-27). The matched filter (6-10) according to the invention comprises N parallel M-sample long shift registers for receiving an equal number of input signals (6-21) at the sampling frequency of the input signal (6-21), wherein N>/=2; first means (6-22) for storing K M-sample long reference signals (6-27), wherein K>/=1; multiplexing means for applying one input signal (6-21) and one reference signal (6-27) at a time from said shift registers and said storage means to correlation calculation means (6-50) by applying alternately at least one combination of the input signals (6-21) and the reference signals (6-27) to the calculation means (6-50); calculation means (6-50) for calculating the correlation time-dividedly for each combination of an input signal (6-21) and a reference signal (6-27) so that correlation results calculated from different signals appear at the output of the calculation means (6-50) as a sequence.