Pseudo-random number sequence filter, filtering method and...

Details Pseudo-random number sequence filter, filtering method and... Pseudo-random number sequence filter, filtering method and...

2006-07-24

2008-12-16

Tse, Young T. (Department: 2611)

Pulse or digital communications

Receivers

Interference or noise reduction

C708S301000

Reexamination Certificate

active

07466780

ABSTRACT:
An FIR filter for filtering a prescribed real impulse constant (r) (−1<r<1) receives in a terminal the input of the input signal of the Chebyshev-chaos type spreading code sequence having a chip length D. A plurality of signals obtained by delaying the input signals by 0, D, 2D, 3D, . . . , and (N−1)D are output by a delay circuit. When the delay time is T, a plurality of delayed and output signals are multiplied by (−r)N−T/Dwith an amplifier and output, and the sum of a plurality of amplified and output signals, namely an optimum chaos-type spreading code string, is output by an adder.

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