Spread spectrum rake receiver

Details Spread spectrum rake receiver Spread spectrum rake receiver

2005-01-13

2009-08-11

Fan, Chieh M (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S349000

Reexamination Certificate

active

07573934

ABSTRACT:
Even when the number of paths is increased, interfering noises can be effectively reduced by a rake receiver for use in a spread spectrum communication system. The rake receiver includes a timing detecting unit detecting a reception timing ti(i=1 to N) of each of N paths when direct spread spectrum signals of the N paths are received; an inverse spreading timing setting unit setting, as a timing for inverse spreading, a timing ti,j,k(k=1 to N, k≠j) at which an inverse spread value is obtained that has interference and correlation from the jth (j=1 to N, j≠i) path included in the inverse spread value of the ith path counted from the reception timing ti(i=1 to N) detected by the timing detecting unit; a plurality of correlators each obtaining an inverse spread signal of the received signal corresponding to each timing set by the inverse spreading timing setting unit; and a signal composing unit composing outputs of the plurality of correlators.

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