Analysis of FH multi-user DFT spreading OFDM system for anti-jamming

DFT (discrete Fourier transform) spreading OFDM (orthogonal frequency division multiplexing) system is used as a promising technique to solve high PAPR (peak to average power ratio) problem of OFDM system. DFT spreading system is much sensitive than OFDM system against jamming signal because jamming signal is divided into all sub-carrier by IDFT process of DFT spreading OFDM although it has better transmission power efficiency. Therefore, we like to analyze effect of jamming signal to DFT spreading OFDM system by considering Multi-tone jamming (MTJ) and partial band jamming (PBJ). And to make anti-jamming system we adapt frequency hopping method of spread spectrum methods and analyze system performance according to the processing gain related the number of frequency hopping bins.