Patent ID: 7010024

Claim:
A matched filter for implementing the correlation of input signals and reference signals, the matched filter comprising: first means for storing M samples taken from N input signals, wherein N≧2, and in which said M samples of the N input signals are stored one sample at a time at said N input signals' frequencies; second means for storing K M-sample long reference signals, wherein K≧2 and said M-sample long reference signals correspond to more than one transmitter; multiplexing means for applying one of said N input signals and one of said M-sample long reference signals at a time from said first and second storage means to calculation means by applying alternately at least one combination of the N input signals and the M-sample long reference signals; and calculation means for calculating the correlation time-dividedly for a combination of said N input signals and said M-sample long reference signals so that correlation results calculated from different input and reference signals appear at the output of the calculation means as a sequence.