用现代DSP微处理器对直接序列扩频码进行FFT处理

Proceedings of the IEEE 1991 National Aerospace and Electronics Conference NAECON 1991 Pub Date : 1991-05-20 DOI:10.1109/NAECON.1991.165729

R. G. Davenport

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引用次数: 17

摘要

说明了如何使用DSP(数字信号处理)-微处理器模块来快速识别和获取GPS(全球定位卫星)系统的C/ a码。具体来说，作者描述了Inmos的VecTram DSP模块的使用，该模块由Inmos的32-b浮点转换器和Zoran的32-b浮点矢量信号处理器(VSP)组成。该算法利用快速傅立叶变换在频域对伪随机序列进行关联。频域相关算法被证明比时域相关要有效得多，假设时域相关是在性能相当的硬件上进行的。作者探讨了该技术的原理，并提供了算法和结果的例子。没有提供数学上严格的描述。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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FFT processing of direct sequence spreading codes using modern DSP microprocessors

It is illustrated how a DSP (digital signal processing)-microprocessor-based module can be used for rapid identification and acquisition of the GPS (Global Positioning Satellite) system C/A codes. Specifically, the author describes the use of Inmos' VecTram DSP module, which consists of an Inmos 32-b floating point transputer and Zoran's 32-b floating point vector signal processor (VSP). The algorithm correlates a pseudorandom sequence in the frequency domain using the fast Fourier transform. The frequency-domain correlation algorithm is shown to be considerably more efficient than time-domain correlation, assuming that the time-domain correlation is performed with hardware of comparable performance The author explores the philosophy of the technique, and provides examples of the algorithm and results. A mathematically rigorous description is not provided.<>

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来源期刊

Proceedings of the IEEE 1991 National Aerospace and Electronics Conference NAECON 1991

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