基于循环自相关的NC-OFDM信号参数的盲估计

TN911.7%TP391; 在认知无线电(CR)环境中,频率资源不足的问题越来越严重,而非连续正交频分复用(NC-OFDM)能够工作在非连续的频谱环境.针对NC-OFDM信号的参数估计问题,提出一种循环自相关的方法.该方法首先分析循环平稳信号特点,然后根据NC-OFDM信号的循环自相关,在循环频率α以及时延τ切面图具有离散谱线特征进行参数估计,最后对NC-OFDM信号的循环自相关进行数值仿真.仿真结果表明在低信噪比下,能有效估计NC-OFDM信号的参数及识别零前缀的正交频分复用信号(ZP-OFDM),且实验证明关闭近90％的子载波数目都能够实现NC-OFDM信号的参数的盲估计....

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Published in计算机应用研究 Vol. 36; no. 5; pp. 1486 - 1489
Main Authors 王胜, 张天骐, 袁帅
Format Journal Article
LanguageChinese
Published 重庆邮电大学信号与信息处理重庆市重点实验室,重庆,400065 2019
Subjects
循环自相关
参数盲估计
零前缀的正交频分复用
非连续正交频分复用
认知无线电
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Abstract TN911.7%TP391; 在认知无线电(CR)环境中,频率资源不足的问题越来越严重,而非连续正交频分复用(NC-OFDM)能够工作在非连续的频谱环境.针对NC-OFDM信号的参数估计问题,提出一种循环自相关的方法.该方法首先分析循环平稳信号特点,然后根据NC-OFDM信号的循环自相关,在循环频率α以及时延τ切面图具有离散谱线特征进行参数估计,最后对NC-OFDM信号的循环自相关进行数值仿真.仿真结果表明在低信噪比下,能有效估计NC-OFDM信号的参数及识别零前缀的正交频分复用信号(ZP-OFDM),且实验证明关闭近90％的子载波数目都能够实现NC-OFDM信号的参数的盲估计.
AbstractList TN911.7%TP391; 在认知无线电(CR)环境中,频率资源不足的问题越来越严重,而非连续正交频分复用(NC-OFDM)能够工作在非连续的频谱环境.针对NC-OFDM信号的参数估计问题,提出一种循环自相关的方法.该方法首先分析循环平稳信号特点,然后根据NC-OFDM信号的循环自相关,在循环频率α以及时延τ切面图具有离散谱线特征进行参数估计,最后对NC-OFDM信号的循环自相关进行数值仿真.仿真结果表明在低信噪比下,能有效估计NC-OFDM信号的参数及识别零前缀的正交频分复用信号(ZP-OFDM),且实验证明关闭近90％的子载波数目都能够实现NC-OFDM信号的参数的盲估计.
Author 袁帅
张天骐
王胜
AuthorAffiliation 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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Zhang Tianqi
Yuan Shuai
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Keywords 循环自相关
参数盲估计
零前缀的正交频分复用
非连续正交频分复用
认知无线电
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Title 基于循环自相关的NC-OFDM信号参数的盲估计
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