单载波信号波特率参数的宽带估计算法
Baud rate broadband estimation algorithm for single-carrier signal
赵艳 1罗胜恩 2万坚2
作者信息
- 1. 解放军信息工程大学信息工程学院,河南郑州450002;盲信号处理重点实验室,四川成都610041
- 2. 盲信号处理重点实验室,四川成都610041
- 折叠
摘要
宽带信道化接收中常常采用均匀子带技术,当宽带接收数据中的信号参数未知时,均匀子带信道化易造成信号频谱割裂.本文针对该问题建立了单载波信号予带信道化输出的数学模型,通过将信号的频谱损失视为码元成型函数的变化,证明了子带信号保留了原信号的循环平稳特性,提出了一种新的基于子带信号复包络平方谱的波特率估计算法.该方法不需要重构出原信号,利用频谱有损的子带信号就能进行参数估计,提高了宽带处理的效率.仿真实验给出了在不同带宽覆盖比和不同信噪比下算法的估计性能.理论分析和仿真结果验证了算法的有效性和可靠性.
Abstract
Uniform subband technology is popular in broadband channelization.When the signal characteristics are unknown,uniform subband channelization will lead to disseverment of signal spectrum.The mathematic model of subband channelization is established for single-carrier signal.The spectrum distortion is considered as the transition of shape function.Therefore the subband signal preserves the cyclostationarity of original signal.A new baud rate estimation algorithm is presented based on the envelope characteristic of subband analytic signal without reconstructing the original signal.This algorithm improves the efficiency of the broadband processing.The influences of the frequency domain coverage percentage and Signal Noise Ratio (SNR) are analyzed with the computer simulation.Simulation results and theoretical deductions prove that this algorithm is efficient and credible.
关键词
波特率估计/宽带接收/单载波信号/均匀子带Key words
baud rate estimation/broadband receiving/single-carrier signal/uniform subband引用本文复制引用
出版年
2013
NETL
NSTL
维普
万方数据