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基于块编码的功率谱可控复合序列

DOI: 10.3969/j.issn.1006-7043.201310071

Keywords: 直扩认知用户, 复合序列, 块编码, 功率谱, 可控

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Abstract:

为了研究功率谱凹陷的复合序列, 实现直扩认知用户频谱接入通信, 提出了将块编码码字与伪随机序列进行复合的序列产生方法。该方法通过设计块编码的码字及码字符号时间间隔, 控制复合序列功率谱的凹陷位置。通过对复合序列功率谱密度表达式的推导及仿真实验验证了复合方式的可行性及功率谱的可控性。将该复合方式应用于直扩认知用户, 建立了直扩认知用户通信系统模型。实验结果表明, 在不影响授权用户通信性能的前提下, 采用所设计复合序列的直扩认知用户能够有效的实现频谱接入通信。

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