| 引用本文: | 任啸天,徐晖,王翔,等.基于双PN周期的短码DS-SS信号扩频波形及信息序列盲估计方法.[J].国防科技大学学报,2011,33(3):121-125.[点击复制] |
| REN Xiaotian,XU Hui,WANG Xiang,et al.Double PN-period Based Blinding Estimation of Spread-spectrum Waveform and Information Sequences of Short Code DS-SS Signals[J].Journal of National University of Defense Technology,2011,33(3):121-125[点击复制] |
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| 基于双PN周期的短码DS-SS信号扩频波形及信息序列盲估计方法 |
| 任啸天, 徐晖, 王翔, 黄知涛, 王丰华 |
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(国防科技大学 电子科学与工程学院， 湖南 长沙 410073)
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| 摘要: |
| 针对短码DS-SS信号盲解扩,研究了DS-SS信号的扩频波形及信息序列盲估计问题，提出一种基于双PN周期分解的扩频波形与信息序列联合盲估计算法，该算法在低信噪比条件下同时完成扩频波形和信息序列的估计，计算量小，且避免传统方法利用单PN周期分解时扩频序列连接的相位模糊等问题，提高了盲估计的正确率。最后仿真验证了算法的有效性。 |
| 关键词: 直接序列扩频 扩频波形盲估计 奇异值分解 信息序列盲估计 |
| DOI： |
| 投稿日期：2010-09-15 |
| 基金项目: |
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| Double PN-period Based Blinding Estimation of Spread-spectrum Waveform and Information Sequences of Short Code DS-SS Signals |
| REN Xiaotian, XU Hui, WANG Xiang, HUANG Zhitao, WANG Fenghua |
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(College of Electronic Science and Engineering, National Univ. of Defense Technology，Changsha 410073, China)
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| Abstract: |
| Aiming at improving the validity of blind dispreading DS-SS signal, the blind spread-spectrum and information sequence estimation of DS-SS signals is studied in this paper. Based on double PN periods, a new method of blinding estimate PN sequence and information sequence jointly was presented. The advantage of the algorithm is that it can estimate the PN sequence and information sequence jointly, with less computational cost. Compared with the traditional methods, this algorithm avoids the problem of phase ambiguity when the whole PN sequences are reconstructed using the two parts of spread-spectrum waveforms, which can highly improve the validity of blind estimation. The simulation results verify the validity of this algorithm. |
| Keywords: direct sequence spread spectrum (DS-SS) blinding estimation of spread-spectrum waveform singular value decomposition (SVD) blinding estimation of information sequences |
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