A time-domain block equalization scheme on SIMO frequency selective channels

In recent years, high speed, high-capacity and reliable wireless communications are very demanding. To achieve those requests, it is necessary to solve both time and frequency selective fadings caused by multi-path propagation on wireless channels. Up to now, OFDM as a frequency domain equalization scheme has been mainly considered for the frequency selective fading, but OFDM suffers from its long symbol duration under the time selective fading. On the other hand, single carrier transmission with time domain equalizer does not suffer from the time selective fading because of the very short symbol duration. In this paper, we have proposed the novel time domain equalization schemes for single carrier transmission using block processing on SIMO (single-input multiple-output) frequency selective fading channels, i.e., block linear equalizer (BLE), block equalizer by QRD and M algorithm (QRD-M), etc. They have low complexities and excellent BER performances derived from the path-diversity and the zero padding for IBI (inter-block interference) cancellation.