Rapid Signal Acquisition Techniques for Civilian Military User Equipments Using DSP BasedFFT Processing

机译：使用基于DSP的 r nFFT处理的民用和军事用户设备的快速信号采集技术

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Use of a general purpose DSP for GPS receiverrnimplementation allows processing approaches notrncommonly seen in more traditional architectures. InrnMedium and High PRF radar systems, efficient FFTrnbased methods are used in creating Range/Doppler mapsrnfor detection purposes. This paper explores performancernand design issues associated with an FFT based GPSrnsignal search modeled along the same lines. The resultsrnare rather stunning; a full C/A code sky search canrntypically be done in less than one second with excellentrnsensitivity whereas a traditionally architected GPSrnreceiver might take 1 to 5 minutes to accomplish the samerntask. Furthermore, these results are obtained with anrnapproach optimized for simplicity rather than top speed.rnExtensions to the technique find applicability in highrnperformance military systems where the use of C/A codernis undesirable but is often required due to a poorrnknowledge of time. Direct P(Y) code acquisitionrnperformance is analyzed for a variety of sustainingrnoscillator types and interference levels with thernconclusion that even modest timing accuracy (1 second) isrnsufficient for direct P(Y) acquisition under jammedrnconditions. It should thus be possible to acquire signalsrndirectly, without the use a C/A code, for periods ofrnseveral weeks since last tracking satellites providing a lowrnpower, sustaining oscillator is included.rnSnapshot techniques for improved jamming resistancernduring acquisition are also discussed in the context of arndynamic interference environment. Taking advantage ofrnshort periods of low jamming due to obscuration, antennarnnulls, etc., FFT-based acquisition schemes can outperformrnmore traditional massive correlator architectures.

机译：将通用DSP用于GPS接收器的实现允许在更传统的体系结构中不常见的处理方法。在IndiumMedium和High PRF雷达系统中，基于FFTrn的有效方法被用于创建Range / Doppler图，以用于检测。本文探讨了与基于相同线建模的基于FFT的GPSrnsignal搜索相关的性能设计问题。结果相当惊人。完整的C / A代码空中搜索通常可以在不到一秒的时间内完成，并且灵敏度极高，而传统架构的GPS接收器可能需要1至5分钟才能完成相同的任务。此外，这些结果是通过为简化而不是为最高速度而优化的方法获得的。该技术的扩展发现了在高性能军事系统中的适用性，在这些军事系统中，使用C / A编码器是不可取的，但由于对时间的了解不足而经常需要使用。分析了各种持续谐振器类型和干扰电平的直接P（Y）码采集性能，得出的结论是，即使是适度的定时精度（1秒）也无法在干扰条件下直接进行P（Y）采集。因此，应该可以在不使用C / A代码的情况下直接获取信号，因为包括了最后一个跟踪卫星提供的低功率，维持振荡器，因此可以在几个星期内直接获取信号。在捕获过程中还讨论了用于在捕获过程中改善抗干扰性的快照技术干扰环境。利用基于模糊，天线零位等的短时间低干扰，基于FFT的采集方案可以胜过更多传统的大规模相关器架构。

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《14th international technical meeting of the Satellite Division of the Institute of Navigation (ION GPS-2001)》|2001年|p.2418-2427|共10页
会议地点 Salt Lake City UT(US);Salt Lake City UT(US)
作者
Logan Scott;
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LS Consulting Inc.rnAleksandar Jovancevic and Suman Ganguly, Center for Remote Sensing, Inc.;

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原文格式 PDF
正文语种 eng
中图分类全球定位系统（GPS）;人造卫星;
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1. Expandable 24 IIPhase Complete The 50~th Space Wing has completed phase one of a two phase Global Positioning System constellation expansion known as 'Expandable 24'. When fully complete, this expansion will increase global GPS coverage and provide civil, military and commercial GPS users with more robust satellite availability and a higher probability of signal acquisition in terrain-challenged environments. [J] . GIM international . 2011,第3期

机译：可扩展的24 II阶段完成第50太空翼已完成两阶段全球定位系统星座扩展的第一阶段，称为“可扩展24”。完全完成后，此扩展将扩大全球GPS覆盖范围，并为民用，军用和商用GPS用户提供更强大的卫星可用性，以及在充满挑战的地形环境中获得信号的更高可能性。
2. High Sensitivity and Fast Acquisition Signal Processing Techniques for GNSS Receivers: From fundamentals to state-of-the-art GNSS acquisition technologies [J] . Seung-Hyun Kong IEEE Signal Processing Magazine . 2017,第5期

机译：GNSS接收器的高灵敏度和快速采集信号处理技术：从基础到最新的GNSS采集技术
3. Can the military use commercial wireless signal processing technologies to reduce size, weight and power in radio devices? [Trends in DSP] [J] . Pucker L. IEEE Communications Magazine . 2007,第3期

机译：军方可以使用商业无线信号处理技术来减少无线电设备的尺寸，重量和功率吗？ [DSP的趋势]
4. Rapid Signal Acquisition Techniques for Civilian Military User Equipments Using DSP Based FFT Processing [C] . Logan Scott, Aleksandar Jovancevic, Suman Ganguly International Technical Meeting of the Satellite Division of the Institute of Navigation . 2001

机译：基于DSP的FFT处理的民用和军用用户设备的快速信号采集技术
5. DSP techniques for real time digital signal acquisition and processing of various power quality parameters. [D] . D., Pardeshi Surajkumar. 2011

机译：DSP技术用于实时数字信号采集和各种电能质量参数的处理。
6. Reduction of Acquisition time using Partition of the sIgnal Decay in Spectroscopic Imaging technique (RAPID-SI) [O] . Sourav Bhaduri, Patricia Clement, Eric Achten, -1

机译：使用光谱成像技术中信号衰减的划分来减少采集时间（RAPID-SI）
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Rapid Signal Acquisition Techniques for Civilian Military User Equipments Using DSP BasedFFT Processing

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