An Efficient Channel Model for OFDM and Time Domain Single Carrier Transmission Using Impulse Responses

TARIQ JAMIL SAIFULLAH KHANZADA ； SHEERAZ MEMON ； NAVEED AHMED JAFFARI

《Mehran University Research Journal of Engineering and Technology》 31卷1期 (2012/01) Pp. 95-100

摘要

The OFDM (Orthogonal Frequency Division Multiplexing) is well-known, most utilized wideband communication technique of the current era. SCT (Single Carrier Transmission) provides equivalent performance in time domain while decision equalizer is implemented in frequency domain. SCT annihilates the ICT (Inter Carrier Interference) and the PAPR (Peak to Average Power Ratio) which is inherent to OFDM and degrades its performance in time varying channels. An efficient channel model is presented in this contribution, to implement OFDM and SCT in time domain using impulse responses. Both OFDM and SCT models are derived dialectically to model the channel impulse responses. Our model enhances the performance of time domain SCT compared with OFDM and subsides the PAPR and ICI problems of OFDM. SCT is implemented at symbol level contained in blocks. Simulation results implementing Digital Radio Monadiale (DRM) assert the performance gain of SCT over OFDM.

關鍵字

OFDM ； Peak to Average Power Ratio ； Inter Carrier Interference ； Digital Radio Monadiale