Spread spectrum bit boundary correlation search acquisition...

Details Spread spectrum bit boundary correlation search acquisition... Spread spectrum bit boundary correlation search acquisition...

2006-05-09

2006-05-09

Chin, Stephen (Department: 2634)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S343000, C375S142000, C375S150000

Reexamination Certificate

active

07042930

ABSTRACT:
A multiple integration hypothesis C/A code acquisition system resolves bit boundaries using parallel correlators providing magnitude hypotheses during acquisition to reduce losses over the 20 ms integration period to improve the performance and sensitivity of C/A code receivers to achieve low C/No performance using inexpensive, imprecise oscillators and long noncoherent dwell periods, well suited for in-building, multipath, and foliage attenuated GPS signaling applicable to E911 communications with several dB of additional improvement in receiver sensitivity due to the ability to detect bit synchronization during acquisition.

REFERENCES:
patent: 5946344 (1999-08-01), Warren et al.
patent: 2003/0174792 (2003-09-01), Bow et al.

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