Channel Coding and Clipping in OFDM for WiMAX using SDR

Abstract

Abstract — Recent developments in broadband wireless technology heightened the need for WiMAX which assures high-speed data services. Mobile WiMAX is grounded on orthogonal frequency division multiplexing/orthogonal frequency division multiplexing Access (OFDM/OFDMA) technology which is an increasing important technique in LTE systems. This paper describes the OFDM transceiver implementation using software-defined radio system (SDR). A SDR is a radio communication system where elements have been generally implemented in hardware are rather implemented by software on a personal computer. In this paper, the software part is realized using GNU Radio and the hardware part is implemented using USRP N210. OFDM poses a problem of a Peak to Average Power Ratio (PAPR) or high crest factor. To stave off this problem either High Powe