Detection of Signals in MC–CDMA Using a Novel Iterative Block Decision Feedback Equalizer

This paper presents a technique to mitigate multiple access interference (MAI) in multicarrier code division (MC-CDMA) wireless communications systems. Although under normal circumstances the MC-CDMA system can achieve high spectral efficiency and resistance towards inter symbol (ISI) however when exposed substantial nonlinear distortion issue of MAI manifests. Such results power amplifiers are driven into saturation or transmit signal experiences extreme adverse channel conditions. The proposed uses modified iterative block decision feedback equalizer (IB-DFE) that minimal mean square error (MMSE) receiver feed-forward path nullify residual from IB-DFE receiver. received is re-filtered an process significantly improve system’s performance. effectiveness systems has been analysed various harsh conditions, this analysis presented here confirm outperform conventional methodologies terms bit rate (BER) lesser computational complexity.