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�������պ����ѧѧ�� 1998, Vol. 24 Issue (5) :506-509    DOI:
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GPS C/A Code Search and Implement in GPS Receiver
Sun Li, Zhang Qishan*
Beijing University of Aeronautics and Astronautics,Dept. of Electronic Engineering

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Abstract�� From GPS signal charcteristics,time/frequency two dimension sequential search principle is introduced in this paper.Three basic sequential search techniques and an improved search technique are compared with performances of false alarm probability,detection probability and searching rate.A digital system based on spread spectrum correlator is proposed and verified for GPS C/A code acquisition,while parameters are trade off for better performance.The improved search algorithm is adopted for shortening average acquisition time and improving acquiring reliability.It has been successfully used in digital GPS receiver.
Keywords�� receiver   pseudorandom code   satellite navigation   algorithm     
Received 1997-04-18;
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����, ������.GPS���ֽ��ջ���C/A�������㷨��ʵ��[J]  �������պ����ѧѧ��, 1998,V24(5): 506-509
Sun Li, Zhang Qishan.GPS C/A Code Search and Implement in GPS Receiver[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 1998,V24(5): 506-509
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