Data Recovery Using ML Equalizer in NLOS Communication Environment

Wireless communication has become very important in this world due to easy handling of equipments and installation of operating software’s. The capacity and gain of these equipments depend on the channel conditions therefore we have to take care of channel noise, delay, gain, signal propagation and processing equipments. At the receiving end, receiver is responsible in inverting the effect of channel, therefore equalizers are required. A single input single output antenna system at the transmitter and receiver cannot show the better recovery of original transmitted data sequence, therefore we need multiple inputs multiple output antenna systems in our equipment. We have used different equalizers to improve the BER performance at the receiver and also the QPSK modulation is used at the transmitter. The spatial multiplexing has shown very good performance at the receiver and improves the gain of our system however complexity of the algorithm returned in time consumption. Finally the optimum performance is achieved by maximum likelihood equalizer.