Abstract
Today, in OFDM systems, zero-IF receivers are very appealing, because they avoid costly IF filters. However, this very popular architecture implies IQ demodulation at RF and thus introduces new drawbacks and large performance degradations. It?s therefore very important to study the impact of RF front-end non-idealisties on performances of OFDM receiver. Especially, it?s necessary to investigate the influence of I/Q gain and phase imbalance, local oscillator phase noise and non-linear distortion. In this paper, 802.11g standard has been studied in terms of Bit Error Rate (BER) and constellation of each subcarrier. Simulated and measured results have been studied in the four arms SMI (Sample Matrix Inversion) as compared with a single antenna receiver. Two channel conditions, AWGN channel and multipath channel (taking account the fading correlation), have been modelled and stdied to quantify WLAN performance degradations but also to evaluate the efficiency of a multi element antennas systems at the receiver to improve significantly the performances of a wireless system. Advanced Design System (ADS ? Agilent Technologies) software and a radio test-bed have been used in this work.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
