摘要
This paper proposed four types of differential modulation to map the unitary code into the orthogonal frequency division multiplexing(OFDM) signal. The time-varying channel model is established and the norm of detection metric is deduced. The norm is the inherent interference of the time-varying channel, so it can be used as criterion to evaluate the performance of the mapping schemes. The simulation results agree with the analytic conclusion.
This paper proposed four types of differential modulation to map the unitary code into the orthogonal frequency division multiplexing（OFDM） signal. The time-varying channel model is established and the norm of detection metric is deduced. The norm is the inherent interference of the time-varying channel, so it can be used as criterion to evaluate the performance of the mapping schemes. The simulation results agree with the analytic conclusion.
关键词
微分调制
空间频率代码
整体空间—时间编码
分析结论
differential modulation
space frequency code
time-varying channel
unitary space-time code
