Array Signal Parameter Estimation Based on Maximum Likelihood Method

• Main Authors: Chia-Ming Chang, 張家銘
• Other Authors: Hsien-Sen Hung
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/50996767476781586099

碩士 === 國立臺灣海洋大學 === 電機工程學系 === 98 === Array signal processing is one of the important topics in the estimation of signal’s direction-of-arrival angle and channel parameters, widely used in wireless communications, radar and sonar for object localization and tracking. Through the known waveform of a transmitted signal and the received array signal, channel parameters induced by channel effect, such as delay-time, incident angle and attenuation coefficient, can be estimated and are helpful for signal detection. This thesis is aimed at estimating the incident angle of a single source and channel parameters. In the case of a single source, we use the maximum likelihood method to estimate parameters and derive their Cramer-Rao lower bounds(CRLBs) for accuracy comparison of the estimated values. Finally, performance evaluation via computer simulations is performed for the case of a single far-field narrowband source. Keyword : Maximum Likelihood Method、Array signal、CRLB、Channel estimation、direction-of-arrival angle