| 引用本文： |
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罗 奎,程 剑,李仰志,等.非相干累加中检波方式的性能分析与参数选取[J].电讯技术，2011，51（5）： - . [点击复制]
- LUO Kui,CHENG Jian,LI Yang-zhi,et al.Performance Analysis and Parameters Selection of Detection Methods Based on Non-coherent Accumulation[J].，2011，51（5）： - . [点击复制]
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| 摘要: |
| 阐述了GNSS信号捕获过程中非相干能量累加的两种检波方式的实现原理，利用雷达
检测理论对两者的性能进行了分析对比与数值计算，给出了两种检波方式的性能曲线。提出
了两种相干累加时间与累加次数的选取方法并进行了仿真，该方法和仿真结果可作为GNSS系
统信号捕获与跟踪过程方案设计的参考依据。仿真结果还表明，平方律检波方式相比于包络
检波方式，在能量累加性能上要略差，差值在0.5 dB以内。 |
| 关键词: GNSS 信号捕获 扩频 非相干累加 包络检波 平方律检波 |
| DOI： |
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| 基金项目:国家高技术研究发展计划（863计划）项目(2008AA12Z307) |
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| Performance Analysis and Parameters Selection of Detection Methods Based on Non-coherent Accumulation |
| LUO Kui,CHENG Jian,LI Yang-zhi,LAI Guang-feng |
| (Institute of Communication and Engineering,PLA University Science and Technolog
y,Nanjing 210007,China) |
| Abstract: |
| Two detection methods in non-coherent energy accumulation in GNSS(Global Naviga
tion Satellite System) sig
nal acquisition process are discussed, the properties of which a
re analysed and compared by using radar detection theories, the performance curv
es
of the two methods are plotted by Matlab. Two methods to chose coherent accu
mulation time and non-coherent accumulation times are proposed and simulated.
The methods and simulation results can be used as a reference in GNSS de
sign. The simulation results also show that the envelop detection performs bette
r than square law detection on energy accumulation less than 0.5 dB. |
| Key words: GNSS signal acquisition spread spectrum non-coherent accumulation envelop det
ection square law detection |
《电讯技术》编辑部 