Noise floor independent delay-locked loop discriminator

Details Noise floor independent delay-locked loop discriminator Noise floor independent delay-locked loop discriminator

2011-08-09

2011-08-09

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S371000, C375S354000

Reexamination Certificate

active

07995683

ABSTRACT:
A system and method for providing code tracking in a CDMA based communications receiver. In example systems and methods, a CDMA receiver, such as a GPS receiver, receives a signal and demodulates the signal to yield a digital IF signal. The digital IF signal is down-converted to a received code signal. Early, prompt and late correlation results are determined by correlating the received code signal with early, prompt and late duplicates of the received code signal. The early, prompt and late correlation results are used to calculate a code phase error using a noise-floor independent function of all three correlation results.

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Marketing Material/White Paper: SnapTrack: A Qualcomm Company—SnapTrack's Wireless Assisted GPS™ (A-GPS) Solution Provides the Industry's Best Location System—Location Technologies for GSM, GPRS and WCDMA Networks (Qualcomm CDMA Technologies: Enabling the Future of Communications) (4 pages).

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