Timing and frequency offset Estimation in ofdm and multiband Ofdm systems

Abstract

newlineFourth generation 4G and beyond fourth generation wireless newlinecommunication systems are aiming for higher data rates enhanced spectral newlineefficiency and increased mobility requirements than those provided by newlineexisting 3G networks The major challenges of 4G and future wireless newlinecommunications are the detrimental effects of wireless radio channel such as newlinefading and Doppler Multicarrier modulation such as Orthogonal Frequency newlineDivision Multiplexing OFDM is a powerful technique to handle newlineimpairments specific to the wireless radio channel and provides a feasible newlinephysical layer technology The oscillator imperfections of a OFDM transceiver front newlineend and Doppler frequency of the wireless channel can cause frequency newlinesynchronization errors The multipath fading and noise in a wireless channel newlinecan cause timing synchronization errors Unlike their single carrier newlinetransmission multi carrier transmissions are extremely sensitive to Carrier newlineFrequency Offsets CFO and timing offsets newline newline