Performance Analysis of Non-Linear Equalizer in MIMO System for Vehicular Channel

Abstract

All wireless technologies face the challenges of multipath signal fading, attenuation delay and phase delay which led to the interference between users and there is the possibility of limited spectrum. Linear and Non-Linear receiver is used to combat the effect of multipath signal fading and delay. The linear receiver gives best result in case of static environment but in case of dynamic environmental condition it fails to give better results and hence in order to improve the system performance non-linear receiver is used in dynamic environment condition. As a dynamic channel, Vehicular Channel model is considered because there is growing interest in vehicular networking and it is also a challenging channel model because of the complexity of the environment, and rapid variation in channel conditions. This paper studies the comparison between Zero Forcing (ZF) and Minimum Mean Square Error (MMSE) receiver in the Vehicular Channel. A comparative study between linear equalizer and non-linear equalizer in the Vehicular Channel is done and analyze the effect of the varying modulation and antenna configuration on the performance

Adaptive Modulation and Coding with Channel State Information in OFDM for WiMAX

“…A transmitted symbol may reach the receiver on the other symbol period and induces inter symbol interference (ISI) [3]. At higher data rates, the symbol time is shorter; hence, it assumes merely a small delay to induce ISI.…”

“…At higher data rates, the symbol time is shorter; hence, it assumes merely a small delay to induce ISI. Equalization [3] is the formal method for handling with ISI but at high data rates need an excessive amount of processing power. OFDM (orthogonal frequency division multiplexing) [4] has transformed into the best solution for mitigating ISI in broadband systems, including WiMAX to lend different guard intervals.…”