An Overview: Improvement in Ber Performance of OFDM System Using Companding Technique.
Companding transform is a simple and efficient method in reducing peak to average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) system. In this paper a method of performance enhancement with reference to the performance measures like BER and system spectral regrowth will be investigated by employing non linear companding for PAPR reduction in DVB-T system. .
Purpose ::: The objectives of this study were (1) to investigate the effects of manure compost and earthworms on Cd mobility in Cd-contaminated soil, (2) to test whether the bioturbation of earthworms reduces the immobilization effect of the manure compost when they are combined, and (3) to explore the distribution of Cd in aggregates formed by earthworms with corresponding fractionation analysis.