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基于FPGA的扩频信号的相位解旋 被引量:1

Phase Helicase for Spread Spectrum Signal Based on FPGA
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摘要 GPS与GLONASS二合一卫星导航接收机中相位解旋(载波剥离)方案的选取和实现对基带信号处理的实现和定位解算的稳定度和精度有很大的影响,一般的相位解旋方案不能满足二合一接收机的实际情况。根据相位解旋的原理,针对二合一接收机的实际问题,选取复数对相位解旋方案,并在具体实现中对其结构进行改进。利用FPGA实现相位解旋的逻辑结构,通过前后仿真验证,应用在二合一实时接收机中,有效地简化了基带信号处理,提升了定位解算的稳定度和精度。 The program selection and implementation of phase helicase(carrier strip) affects the baseband signal processing and the stability and accuracy of position resolution greatly in GPS and GLONASS satellite navigation receiver.General phase helicase program can not meet the actual situation of the combo receiver.According to the principle of phase helicase and the practical problems of the combo receiver,the complex phase helicase program is selected,and improvements are achieved in particular in its structure.By using FPGA,the logical structure of the phase helicase is achieved,and function and timing simulation are completed.Applying this program in real-time combo receiver,the baseband signal processing is simplified effectively and the stability and accuracy of the position resolution are enhanced.
出处 《测控技术》 CSCD 北大核心 2011年第2期103-105,109,共4页 Measurement & Control Technology
关键词 FPGA 相位解旋 正交下变频 载波NCO FPGA phase helicase quadrature downconversion carrier NCO
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  • 1(美)Kaplan E D,等.GPS原理与应用[M].第2版.寇艳红译.北京:电子工业出版社,2007-07:112-134.
  • 2(美)Tsui B Y.GPS软件接收机基础[M].第2版.陈军,潘高峰,译.北京:电子工业出版社,2007-09:91-105.
  • 3(美)Misra P,Enge P.全球定位系统--信号、测量与性能[M].第2版.罗鸣,曹冲,等译.北京:电子工业出版社,2008-04:180-213.

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