Improving the Signal Quality of Multistream Data Transmission in 4G Services

Relaying is one of the key feature in wireless standards that expand the coverage of wireless networks. The ever increasing demand for very high data rate servicesmake use of multicarrier modulation techniques. This project explains about the improvement in bit error rate and elimination of interference. Conjugate Cancellation scheme for transmitter design, Phase Rotated Conjugate Cancellation scheme for receiver design and Equalize and Forward relay provides an efficient method for interference cancellation. In transmitter side only one phase rotation is applied and two phase rotations are applied at the receiver side. With such rotations the mismatch between the transmitter and the receiver can be tracked. The optimal solutions can be obtained by Block least mean square algorithm. Simulation results using the metrics viz. SNR, BER shows the performance of the proposed scheme achieves the interference free transmission and improvement in bit error rate.