摘要
根据煤矿井下无线通信特性,建立了服从瑞利分布的具有频率选择性衰落的信道模型,研究了动态改变传输比特与功率分配的自适应正交频分复用(OFDM)算法。仿真结果表明:自适应比特与功率分配算法的误码率性能明显好于固定调制;多输入多输出(MIMO)技术的误码率明显好于单输入单输出(SISO)技术。
According to properties of underground wireless communications in coal mine,a channel model submitting to the Rayleigh distribution with a frequency selective fading is set up. Based on the model, an adaptive Orthogonal Frequency - Division Multiplexing （OFDM） algorithm is presented. The simulation results show that the BER performance of adaptive OFDM is greatly better than that of fixed OFDM, and the BER of MIMO- OFDM is greatly better than that of SISI- OFDM.
出处
《现代电子技术》
2009年第1期43-46,共4页
Modern Electronics Technique
