Channel Estimation and Equalization with FDRM for OFDM Systems

• Main Authors: Jin-Chang Gu, 古晉昌
• Other Authors: Miin-Jong Hao
• Format: Others
• Language: en_US
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/59772131781068456515

碩士 === 國立高雄第一科技大學 === 電腦與通訊工程所 === 95 === Bandwidth efficient digital transmission is very difficult through a channel that has moving multipath distortion because adaptive equalizers frequently can not adapt fast enough. If the multipath effect is severe, the error rate may be so high that the data is useless even with no random noise added to the transmission. In order to reduce the error rate, channel estimation and equalization is a very important topic. The frequency domain reciprocal modulation (FDRM) has been proposed to solve the problem of very fast dynamic multipath distortion in wireless communication environments. In our research, we use the FDRM to estimate the channel characteristic. Then using the estimation channel design an equalizer by mean-square error criterion to equalization channel. In order to improvements in channel estimation and system performance, we use the fractional spaced equalizers (FSE). The spline interpolation has been used in our research that is use to reconstruct channel characteristic.