Throughput Maximization of Adaptive MQAM and the Effects of Inaccurate Feedback Channel Estimation
Based on the analysis of system throughput with fixed modulation for packet transmission in Rayleigh fading environment, optimal channel signal to noise ratio (SNR) switching thresholds for adaptive modulation with maximized throughput are obtained by assuming ideal feedback channel estimation. Significant throughput improvement is achieved and the packet size is shown to have strong effect on throughput performance. Next, based on the Gaussian distributed and uniformly distributed models of channel estimation error, throughput performance of adaptive MQAM with inaccurate feedback channel estimation is investigated. Results obtained show that throughput of the adaptive system is quite sensitive to channel estimation error when the metric of estimation error is larger than 3 dB.
Adaptive modulation link adaptation Rayleigh fading
Junsong Xie Pingzhi Fan
Institute of Mobile Communications Southwest Jiaotong University, Chengdu, 610031, China
国际会议
成都
英文
404-407
2003-08-27（万方平台首次上网日期，不代表论文的发表时间）