GPS L1 C/A Signal Acquisition Analysis
January 2007
Don Benson, The MITRE Corporation
ABSTRACT
This report presents a performance analysis of a representative technique for GPS L1 C/A
signal acquisition. The purpose of this report is to analyze the signal acquisition technique
for L1 C/A legacy aviation GPS receivers to determine C/N0 values where acquisition can
occur while satisfying given acquisition scenario constraints. The representative signal
acquisition technique is analyzed since receiver manufacturers build to a performance
specification and not to a specific acquisition algorithm. The results are based on an
acquisition scenario where a position fix must occur within five minuets. Additional
conditions for the acquisition are discussed in the report. Results show that acquisition can
occur at 28.7 dB-Hz C/N0 at the input to the correlators or 31.7 dB-Hz at the output of the
antenna when 1 dB Doppler and code offset losses and 2 dB other implementation losses are
included.
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