Digitaler Vielkanal-Empfänger für GPS
申请公布号:DE69121066(T2)
申请号:DE1991621066T
申请日期:1991.11.28
申请公布日期:1997.01.30
发明人:FENTON, PATRICK, CALGARY, AB T3K 3V6, CA;NG, KWOK-KI KEITH, CALGARY, AB T2W 5T5, CA;FORD, THOMAS J., CALGARY, AB T3H 1X5, CA
分类号:G01S1/00;G01S1/04;G01S19/21;G01S19/22;G01S19/37;H04B1/16;H04B1/707;H04B1/7085;H04B1/709;(IPC1-7):G01S5/14;H03L7/00
主分类号:G01S1/00
摘要:<p>A receiver for pseudorandom noise (PRN) encoded signals consisting of a sampling circuit and multiple channel circuits, with each channel circuit including a carrier and code synchronizing circuit and multiple digital correlators with dynamically adjustable code delay spacing. The sampling circuit provides high-rate digital samples of the incoming composite signal to each receiver channel. Within each channel, the synchronizing circuit detects cycle slips in a locally generated carrier reference signal as well as phase drift in a locally generated PRN code signal. The correlators compare the digital samples with a locally generated PRN code to produce early, late, and/or punctual correlation signals which are used to adjust the local PRN code. A non-linear sampling technique may be used to provide increased sensitivity in the presence of continuous wave interfering signals.</p>
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