Effects of Path Delay Values and Channel Dispersion Length on LS Channel Estimate Performance

• Main Authors: Wei-Chung Cheng, 鄭惟中
• Other Authors: Rainfield Yen
• Format: Others
• Language: en_US
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/57008739987827608934

碩士 === 淡江大學 === 電機工程學系 === 92 === We investigate effects of the multipath delay value (in units of integral and non-integral multiples of data symbol period) and channel dispersion length on the performance of least-square (LS) channel estimation for wireless OFDM systems. Square QAM transmission over frequency-selective slowly fading channels are considered. Several channel fading types, some purely theoretical, are modeled for analysis and simulation studies. They are channels with real Gaussian fading amplitudes, real Rayleigh fading amplitudes, and complex Gaussian amplitudes. Performance measures used are least-square errors of the channel estimate and symbol error rates. Block-type pilot arrangements are used for the LS channel estimation.