Method and system for time-domain transmission diversity in orthogonal frequency division multiplexing

摘要

A method of provided for transmitting and receiving OFDM data signals via multiple outputs of a channel including multiple sub-channels. Transmit data streams are modulated by de-multiplexing the data streams into multiple parallel frequency-domain sub-channel data for conversion into time-domain data; and frequency-domain data for each sub-channel is converted into time-domain data. For each sub-channel, the corresponding time-domain data is differentially encoded to obtain differentially encoded time-domain data; and transmitting the differentially encoded time-domain data. The received signals are converted into digital data signals, and for each sub-channel, corresponding time-domain data from the data signals is differentially decoded to obtain differentially decoded time-domain data. The time-domain data for each sub-channel is converted into frequency-domain data and the frequency-domain data is demodulated into data streams by de-multiplexing the data streams into multiple parallel frequency-domain sub-channel data.