Chip-Level Equalization Using Subband Adaptive Decomposition Technique in MIMO DS-UWB

• Main Authors: yung-cheng liao, 廖永正
• Other Authors: Chia-Chang Hu
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/71580266374144182869

碩士 === 國立中正大學 === 通訊工程學系 === 98 === A Multiple input Multiple output downlink ultra-wideband (UWB) system is investigated to increase the throughput of wireless communication systems. In tradition, minimum mean square error (MMSE) receiver is always used to cope with both the inter-symbol interference (ISI) and the multiple-access interference (MAI) in multipath fading channels. This MMSE receiver has a great performance in bit error rate, but also need a lot of computational complexity. Therefore, a reduced-rank multistage Wiener filter (MWF) receiver is employed to reduce the complexity of the receiver. In order to achieve the bit error rate of MMSE receiver, sub-band decomposition technique is also employed to improve the bit error rate of the MWF receiver. Finally, simulations are conducted to compare the convergence and the bit error rate of the proposed sub-band chip-equalizer with other existing full-band chip-equalizer.