| 单信道时频重叠双信号的码速率估计方法 |
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| 引用本文： | 郭黎利,李旷代,石荣,吴丹.单信道时频重叠双信号的码速率估计方法[J].电子信息对抗技术,2009,24(1). |
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| 作者姓名： | 郭黎利 李旷代 石荣 吴丹 |
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| 作者单位： | 1. 哈尔滨工程大学,哈尔滨,150001
2. 信息控制国家重点实验室,成都,610036 |
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| 基金项目： | 国家预研基金项目(9140C10020407) |
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| 摘 要： | 提出一种基于四阶循环累积量的功率谱分析算法，用于解决单信道时频重叠双信号的码速率估计问题。通过计算循环频率轴上不同频率处的四阶循环累积量值，得到双信号在各自循环频率处的脉冲，对脉冲序列进行功率谱分析，提取隐含的周期性从而估计双信号的码速率。算法适用于多种数字调制类型的通信信号，且在低信噪比下也具备较好的估计性能。理论分析和仿真试验结果均证明了算法的正确性和有效性。
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| 关 键 词： | 时频重叠 循环累积量 码速率估计 双信号 |
Method for Symbol Rate Estimation of Single-Channel Time-Frequency Overlapped Two-Signal |
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| Authors: | GUO Li-Li LI Kuang-dai SHI Rong Wu Dan |
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| Affiliation: | 1.Harbin Engineering University;Harbin 150001;China;2.National Information Control Laboratory;Chengdu 610036;China |
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| Abstract: | To solve the problems in symbol rate estimation of time-frequency overlapped two-signal in the single-channel,the algorithm of the power spectrum based on fourth-order cyclic cumulants is presented.Through computing the fourth-order cyclic cumulants of received signals at different frequencies,the impulse of two-signal at cyclic frequency is received,and then the power spectrum of impulse sequence is analyzed to abstract the connotative periodicity to estimate the symbol rate.The algorithm could be applied ... |
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| Keywords: | time-frequency overlapped cyclic cumulants symbol rate two-signal |
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