Multi‐Channel System Identification with Perfect Sequences – Theory and Applications –
Multi‐Channel System Identification with Perfect Sequences – Theory and Applications –
复制标题
具有完美序列的多通道系统识别 – 理论与应用 –
DOI：
10.1002/9780470727188.ch7
复制
发表时间：
2008
期刊：
影响因子：
6.5
通讯作者：
C. Antweiler
中科院分区：
文献类型：
--
作者：
C. Antweiler
在语音增强、声学、移动的通信等应用领域，多输入单输出（MISO）系统的输入输出信号的多通道系统辨识是一个基本问题。在这一章中，提出了一种新的方法，它是基于归一化最小均方（NLMS）算法结合一类特殊的激励信号，所谓的完美序列（PSEQs）。它开辟了唯一识别的真实脉冲响应的多个通道与一个简单而有效的方式为所有数量的通道和所有系统长度的测量的可能性。由于其快速跟踪特性，这种新方法还允许实时采集时变脉冲响应。此外，该方法允许识别每种线性信道，无线电或声学，并可以很容易地扩展到多输入多输出（MIMO）（例如，无线）transmission.Several方法已经解决了测量线性和时不变（LTI）系统响应的问题。为了表征数字线性时不变系统，最直接的方法是对系统施加脉冲激励并分析其响应。然而，对于许多应用，我们必须处理系统
The fundamental problem of multi-channel system identification given the input and the output signals of a multiple input–single output (MISO) system arises in many application areas such as speech enhancement, acoustics, or mobile communication. In this chapter a new approach is presented, which is based on the normalized least-meansquare (NLMS) algorithm in combination with a special class of excitation signals, the so called perfect sequences (PSEQs). It opens up the possibility of uniquely identifying the true impulse responses of multiple channels with one measurement in a simple and efficient way for all numbers of channels and all system lengths. Owing to its fast tracking property, this new approach also allows the real-time acquisition of timevariant impulse responses. Furthermore, the method allows an identification of each kind of linear channel, radio or acoustic, and can easily be extended to multiple input–multiple output (MIMO)(eg, wireless) transmission.Several approaches have addressed the problem of measuring linear and time-invariant (LTI) system responses. In order to characterize a digital linear, time-invariant system, the most direct approach is to apply an impulsive excitation to the system and analyze its response. For many applications, however, we have to deal with system