Viterbi Decoder Using Channel State Information in SIMO-OFDM Systems

• Main Authors: Jiun Fu Chen, 陳俊甫
• Other Authors: Y. A. Kao
• Format: Others
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/13011570100907632521

碩士 === 長庚大學 === 電機工程學系 === 98 === In this thesis, we investigate and analyze the Viterbi decoder with channel state information (CSI) for SIMO-OFDM system. After the signals are equalized in every antenna for receiver, we use the maximal ratio combining (MRC) method to obtain the optimal estimated transmitted signals. Due to the channel and noise effect, the SNR is different for every subcarrier in OFDM system. That is the reliable degrees of equalized signals on every subcarrier are different. In order to reflect the reliable degrees on every subcarrier, the channel state information can be obtained from the MRC’s coefficients on every subcarrier. The CSI will be used to aid the Viterbi decoder in order to improve the system performance. Finally, we take some examples based on the proposed algorithm to analyze the performances for 1 transmitter antenna and multiple receiver antennas.