PERFORMANCE EVOLUTION ANALYSIS OF DCT PRECODED OFDM WITH PIECEWISE LINEAR COMPANDING FOR WIMAX

Abstract

Orthogonal FDM (OFDM) is a thrilling method for

typical applications those require huge degree of data rates.

Because of the excessive PAPR, the complexity of HPA and in

addition DAC moreover will growth. For the reduction of PAPR in

OFDM several strategies are to be had. Among them Companding

is an appealing low multifaceted way for the OFDM alerts PAPR

diminishment. As of overdue, a Piecewise linear companding

approach is prescribed going for limiting companding contortion.

In this paper, an aggregate Piecewise linear companding (PLC)

method and Discrete Cosine Transform (DCT) approach is relied

upon to reduce PAPR of OFDM to a top notch extent. Simulation

outcomes suggests approximately show off this new proposed

method acquires noteworthy PAPR lower even as keeping up

improved overall performance in the Bit Error Rate (BER) in

comparison to piecewise linear companding approach without PSD

overall performance degradation