Simulation and Performance Analysis for Ordering Algorithm in ZF and MMSE Detectors for V-BLAST Architectures

BLAST (Bell Labs Layered Space-Time) architectures are a multi-layer symbol detection schemes, for MIMO communication systems, where V-BLAST is a vertical BLAST algorithm for detect the transmitter symbols from different transmit antennas successively in a certain independent data order. ZF (Zero Forcing) and MMSE (Minimum Mean Square Error), already knowing are linear detectors or equalizers which optimize the V-BLAST detection. Due to the propagation and interference errors, the performance of V-BLAST detection scheme is affected, in order to minimize this effect, several ways was proposed to improve the symbol performance detection, but some require a complex and high computational cost, Foschini proposed a low-complexity way for BLAST detection, in each step for the received signals, from all but one antenna are eliminated using interference suppression and cancellation with already detected signals. Ordering algorithm is one of the low-complexity ways in BLAST schemes which improve the performance on symbol detection. This paper performs the comparison analysis and simulation performance of ZF and MMSE detectors on V-BLAST scheme with and without ordering algorithm.