Gated time division multiplexed spread spectrum correlator

Details Gated time division multiplexed spread spectrum correlator Gated time division multiplexed spread spectrum correlator

2006-10-31

2006-10-31

Kim, Kevin (Department: 2611)

Pulse or digital communications

Spread spectrum

C375S142000, C375S147000, C375S150000, C375S343000, C375S316000, C370S294000, C370S347000, C370S345000, C370S337000

Reexamination Certificate

active

07130326

ABSTRACT:
A civil moderate (CM) code and a civil long (CL) code are time division multiplex (TDM) as a combined code having alternating code chips that spectrum spread a transmitted signal received by a receiver tracking the spectrum spreading code using a two-level correlator operating with +1 and −1 values to alternately correlate the received CM and CL code chips using a gating signal to gate by time the correlation of the two codes. The time gated two-level TDM correlation can be used in communication receivers, such as GPS receivers, receiving the TDM spectrum spreading codes.

REFERENCES:
patent: 5192957 (1993-03-01), Kennedy
patent: 5724384 (1998-03-01), Kim et al.
patent: 6208291 (2001-03-01), Krasner

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