| 军民兼容卫导终端中基带处理影响分析 |
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| 引用本文： | 庞春雷,卢艳娥,严玉国,袁火平.军民兼容卫导终端中基带处理影响分析[J].舰船电子工程,2009,29(12):69-72,134. |
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| 作者姓名： | 庞春雷 卢艳娥 严玉国 袁火平 |
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| 作者单位： | 1. 空军工程大学电讯工程学院导航工程系原理室,西安,710077
2. 西北工业大学电子信息学院,西安,710072 |
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| 基金项目： | 陕西省自然科学基金项目 |
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| 摘 要： | 在军民兼容GPS接收机中，A／D采样速率取决于军码带宽，民用要求需进行抽取，以有效地节省硬件资源。对此着重分析推导了均匀量化对信噪比的影响、有效字长截取对载噪比和正交性能的影响，并给出了最佳截取方案。GPS卫星信号的实际接收机情况，表明结论正确，能在基本不改变接收机性能的情况下有效地节约硬件资源。
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| 关 键 词： | GPS 截取 载噪比 |
Analysis on the Baseband Cutoff in Military and Civil Compatible GNSS Receiver |
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| Pang Chunlei,Lu Yan'e,Yan Yuguo,Yuan Huoping.Analysis on the Baseband Cutoff in Military and Civil Compatible GNSS Receiver[J].Ship Electronic Engineering,2009,29(12):69-72,134. |
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| Authors: | Pang Chunlei Lu Yan'e Yan Yuguo Yuan Huoping |
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| Institution: | Pang Chuntei Lu Yan＇e Yan Yuguo Yuan Huoping (1.College of Telecommunication Engineering, Air Force Engineering University, Xi＇an 710077;2.Institute of Electronic Information, Northwestern Polytechnical University, Xi＇an 710072) |
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| Abstract: | For military and civil compatible GPS receiver, A/D sampling rate is determined by bandwidth of P（y） code. It is needed to lower chip rate C／A code signal in order to saving hardware resource. After analyzing the influence of rounding quantization on the signals of SNR〈0dB, word-length cutoff on CNR and orthogonal performances, the optimal methods are presented. The simulation and experiments based on the signals by military and civil compatible GPS receiver. It is proved correct that the presented method is able to save hardware resource without sacrificing the performances. |
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| Keywords: | GPS |
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