Blind Identification of Multipath Channel with Known Pulse Shaping

• Main Authors: Chun-Kuei Peng, 彭俊魁
• Other Authors: Jeng-Kuang Hwang
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/77254646228220151647

碩士 === 元智大學 === 電資與資訊工程研究所 === 86 === In many digital and mobile communication systems, channel identification and equalization play an important role in determining the system performance, and a lot of blind channel identification methods are proposed in recent years. But most of the blind channel identification methods are designed to identify a composite channel which is composed of pulse shaping filter and multipath channel parameters, i.e., attenuation factors and path delays. All of them are limited to a common channel identifiability problem when there exists common roots among subchannels. In this thesis, we extract the known pulse-shaping filter from a composite channel, and exploit the filter bank representation of the fractionally-spaced structure to estimate the parameters of attenuation factor and path delay. It can be accomplished by the nonlinear least squares estimated method. We find that some previous unidentifiable channel can be identified with our method. Furthermore, the performance is much better than some existing methods.