Single-Carrier and UWB Systems with Frequency-Domain Equalization

• Main Authors: Han-Tien Su, 蘇漢添
• Other Authors: Ming-Xian Chang
• Format: Others
• Language: en_US
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/23771245806820216810

碩士 === 國立成功大學 === 電腦與通信工程研究所 === 93 === 　In the future, wireless communication systems must provide high data rate services to satisfy the increasing needs of the next-generation wireless communications networks. However, for high data rate transmission, the channel is severely frequency-selective due to the presence of many interfering paths with different time delays. Conventional equalization in the time domain may become impractical because its complexity grows with channel memory or requires very long FIR filters to achieve acceptable performance. 　In thesis, we introduce an approach to apply frequency domain equalization (FDE) in the Single-Carrier (SC), CDMA and CDMA UWB systems. By performing the MMSE and ZF equalizations in the frequency domain, the complexity of the equalization can be significantly reduced with the FFT operation. Further, we present a least-square-fitting channel estimation method for SC/FDE. The performance of the SC/FDE system is evaluated with perfect and least-square-fitting channel estimation techniques.