Effect of Cosine Rolloff Filter on Low-IF Multi-Channel Receiver in Digital Communication System

Software defined radio (SDR) technology has been attracted due to its flexibility and efficient performance in mobile communication. This paper presents an efficient scheme of multichannel low-IF receiver that improves digital communication quality in the sense of BER performance and computational cost. Simply adding cosine rolloff filters to the conventional multichannel receiver, the proposed receiver achieves much higher accuracy, smaller circuit and shorter computation time to process than the conventional one.