Delayed Parallel Interference Cancellation for GPS C/A Code Receivers

• 발행기관: 한국항해항만학회
• 저자명: É amonn P. Glennon Roderick C. Bryant Andrew G. Dempster
• 간행물 정보: 『한국항해항만학회 학술대회논문집』2006년도 International Symposium on GPS/GNSS Vol.2, 1~6쪽, 전체 6쪽
• 주제분류: 공학 > 해양공학
• 파일형태: PDF
• 발행일자: 2006.10.25

영문 초록

A number of different techniques are available to mitigate the problem of cross correlations caused by the limited dynamic range of the 10-bit Gold codes in the GPS C/A code. These techniques include successive-interference cancellation (SIC) and parallel-interference cancellation (PIC), where the strong signals are subtracted at IF prior to attempting to detect the weak signals. In this paper, a variation of these techniques is proposed whereby the subtraction process is delayed until after the correlation process, although still employing a pure reconstructed C/A code signal to permit prediction of the cross correlation process. The paper provides details on the method as well as showing the results obtained when the method was implemented using a software GPS receiver. The benefits of this approach are also described, as is the application of the method to the cancellation of CW interference.

목차

1. Introduction

2. Successive Interference Cancellation

3. Delayed Parallel Interference Cancellation

4. Relationship to the Decorrelating Detector

5. Software Correlator Implementation

6. DPIC Software Correlator Modifications

7. Software Correlator Test Results

키워드

Cross correlation mitigation near-far problem interference cancellation SIC PIC de-correlating detector C/A Gold codes