new technical report...44 ntt docomo technical journal vol.2 no.3 45 ntt docomo technical journal...

44NTT DoCoMo Technical Journal Vol.2 No.3

New Technical Report

ノート

In mobile multimedia communications, Co-Channel Interference (CCI) and Inter-Symbol Interference (ISI) are major problems to overcome. Joint space and time equalizers (S/T-Equalizer) are considered most effective in solving these problems. This article describes a beam and null simultaneous steering Space-Time Equalizer (S/T-Equalizer). The S/T-Equalizer performs separated S/T-signal processing in order to reduce computational complexity to a practical level. The S/T-Equalizer was prototyped. A series of field tests were then conducted using the 5 GHz frequency band to evaluate the transmission performance of the S/T-Equalizer. The results show that the S/T-Equalizer can reduce the ISI effects while maintaining reasonable signal strength, thereby improving BER (Bit Error Rate) performance.

new technical report...44 ntt docomo technical journal vol.2 no.3 45 ntt docomo technical journal...

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