Performance investigation of the WLAN link using QAM and QPSK based on vector signal transceiver 5644R

Abstract

A wireless local area network (WLAN) is a digital transmission system designed to provide location independent network access between computing devices by using radio waves in a limited area. Mainly IEEE 802.11 standards are used to provide wireless connectivity at higher speeds. To analyze and check the continuous feasibility of WLAN signal, Vector Signal Transceiver-VST 5644R can be the efficient approach. In this paper the experimental investigation and analysis of WLAN 802.11 standard has been carried out based on vector signal transceiver VST 5644R using different modulation schemes. It was analyzed that QPSK gives best link performance for the WLAN link. The results are being analyzed in terms of EVM (Error vector magnitude). The link has been evaluated at 2.4GHz using QPSK and QAM modulation schemes. This work is based on experimental and real time implementation of WLAN Link based on PXIe 1062Q VST 5644 platform.