Research Article Effects of Carrier Frequency Offset, Timing Offset, and Channel Spread Factor on the Performance of Hexagonal Multicarrier Modulation Systems | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2009 Article ID 802425 8 pages doi 2009 802425 Research Article Effects of Carrier Frequency Offset Timing Offset and Channel Spread Factor on the Performance of Hexagonal Multicarrier Modulation Systems Kui Xu and Yuehong Shen Institute of Communications Engineering PLA University of Science and Technology No. 2 Biaoying Road Yudao Street Nanjing 210007 China Correspondence should be addressed to KuiXu xiancheng_2005@ Received 17 May 2008 Revised 6 October 2008 Accepted 31 January 2009 Recommended by Mounir Ghogho Hexagonal multicarrier modulation HMM system is the technique of choice to overcome the impact of time-frequency dispersive transmission channel. This paper examines the effects of insufficient synchronization carrier frequency offset timing offset on the amplitude and phase of the demodulated symbol by using a projection receiver in hexagonal multicarrier modulation systems. Furthermore effects of CFO TO and channel spread factor on the performance of signal-to-interference-plus-noise ratio SINR in hexagonal multicarrier modulation systems are further discussed. The exact SINR expression versus insufficient synchronization and channel spread factor is derived. Theoretical analysis shows that similar degradation on symbol amplitude and phase caused by insufficient synchronization is incurred as in traditional cyclic prefix orthogonal frequency-division multiplexing CP-OFDM transmission. Our theoretical analysis is confirmed by numerical simulations in a doubly dispersive DD channel with exponential delay power profile and U-shape Doppler power spectrum showing that HMM systems outperform traditional CP-OFDM systems with respect to SINR against ISI ICI caused by insufficient synchronization and doubly dispersive channel. Copyright 2009 K. Xu and Y. Shen. This is an open access article distributed under the Creative Commons Attribution License .
