An Efficient Adaptive Bit Loading for SFBC-OFDM over Scattering Channel
This paper studies an adaptive modulation technique combined with space-frequency block coded OFDM (SFBCOFDM) over scattering channels. Chow’s adaptive bit loading algorithm is employed in the two transmitter antennas and two receiver antennas SFBC-OFDM. The channel state information (CSI) for adaptive modulation can be acquired more easily in SFBC-OFDM than in multiple input multiple output (MIMO) OFDM. Scattering channels are discussed on the condition of arbitrary spatially uncorrelated scattering (US) field with arbitrary propagation-loss factors. Then scattering function is presented. Simulation results show that adaptive SFBC-OFDM has 1.5 dB and 5 dB advantage compared with fixed modulation SFBC-OFDM and with adaptive OFDM respectively. Furthermore, adaptive SFBC-OFDM requires less additional power gain than fixed modulation SFBCOFDM in mobile scattering channel.
Adaptive modulation SFBC-OFDM Scattering channel
Wei-gong WANG Xin-yu DA
The Telecommunication Engineering Institute,Air Force Engineering University,Xian 710077,Chian
国际会议
The IET 2nd International Conference on Wireless,Mobile & Multimedia Networks(第二届IET国际无线移动多媒体网络会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）