| TDDM-BOC信号副载波类型识别及参数盲估计 |
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| 引用本文： | 张天骐,周杨,叶飞.TDDM-BOC信号副载波类型识别及参数盲估计[J].系统工程与电子技术,2016,38(4):922-928. |
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| 作者姓名： | 张天骐 周杨 叶飞 |
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| 作者单位： | (重庆邮电大学信号与信息处理重庆市重点实验室, 重庆 400065) |
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| 基金项目： | 国家自然科学基金(61371164,61275099,61102131);信号与信息处理重庆市市级重点实验室建设项目(CSTC2009CA2003);重庆市杰出青年基金(CSTC2011jjjq40002);重庆市自然科学基金(CSTC2012JJA40008);重庆市教育委员会科研项目(KJ120525,KJ130524);重庆市研究生科研创新项目(CYS14140)资助课题 |
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| 摘 要： | 针对低信噪比下二进制偏移载波时分数据调制(time division data modulation-binary offset carrier,TDDM-BOC)信号的副载波类型盲识别及参数盲估计问题,提出了一种改进的基于循环谱包络的方法。该方法首先建立副载波分别为正弦和余弦时的TDDM-BOC信号模型,然后推导其对应的循环谱包络,最后通过在循环频率域的一维搜索即可完成副载波的类型识别以及伪码速率和副载波速率的盲估计。仿真分析表明,对于TDDM-BOC(10,5)信号,该方法能在低信噪比下对副载波类型进行有效识别并且实现伪码速率、副载波速率的有效估计。
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| 关 键 词： | 二进制偏移载波时分数据调制信号 循环谱包络 副载波识别 参数估计 |
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Subcarrier type identification and parameters blind estimation of TDDM-BOC modulation signal |
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| ZHANG Tian-qi;ZHOU Yang;YE Fei.#br#
Subcarrier type identification and parameters blind estimation of TDDM-BOC modulation signal[J].System Engineering and Electronics,2016,38(4):922-928. |
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| Authors: | ZHANG Tian-qi;ZHOU Yang;YE Fei |
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| Institution: | (Chongqing Key Laboratory of Signal and Information Processing, Chongqing University of ;
Posts and Telecommunications, Chongqing 400065, China) |
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| Abstract: | For the problem of the time division data modulation-binary offset carrier (TDDM-BOC) signal under low signal-to-noise ratio, including the blind identification of the subcarrier type and the blind parameters estimation, a revised method using the cyclic spectrum envelope of the signal is proposed. Firstly, the signal model is deduced when the subcarrier type of the TDDM-BOC signal is sine and cosine, respectively. Then the corresponding cyclic spectrum envelope is derived. Finally, the subcarrier identification and parameters estimation can be completed by using the single dimensional search of the cyclic frequency domain. Simulation analysis shows that, for the TDDM-BOC(10, 5) signal, the proposed method is effective in the low signal-to-noise cause. |
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