Date of Publication :7th April 2016
Abstract: Multi-carrier modulation has been used in many wired and wireless communications. It was used in many military high frequency radios, audio-video broad casting and DSL. Multi-carrier modulation can be digitally implemented using Orthogonal Frequency Division Multiplexing (OFDM).Inter symbol Interference can be completely avoided in OFDM by inserting cyclic prefixes. In OFDM wide band channel breaks into multiple parallel narrow band channels. Fast Fourier transform and Inverse fast fourier transform in the OFDM system makes the circuit simple, cheap and low cost. Long Term Evolution (LTE) introduced by third generation partnership project is an emerging standard for high speed wireless communications. This standard benefits from the OFDM technology in the down link which provides several advantages, includes high bandwidth efficiency, fit to multipath fading and simplicity of equalizer. OFDM in LTE is a candidate for air interface in fourth generation cellular system. OFDM systems in LTE transforms frequency selective wide band channels into a group of non-selective narrow band channels. OFDM is susceptible to disturbances like CFO. Time and frequency synchronization of OFDM avoids the disturbances in OFDM.Thus synchronization is an essential part in the receiver section of OFDM. The VHDL language is used for coding, Synthesis can be done in Xilinx ISE Design Suite 13.2 and simulation can be done with Model Sim 6.3f.
Reference :
-
[1] Ameneh Golnari, Student Member, IEEE, Mahdi Shabany, Member,IEEE,Alireza Nezamalhosseini, and Glen Gulak, Senior Member, IEEE,Design and Implementation of Time and Frequency Synchronization in LTE , IEEE Trans. Very Large Scale Integr. (VLSI) Syst., Dec 2014
[2] Y.-C. Lin, S.-L. Su, and Y.-J. Fan,Joint sector ID and ICFO detection by using partial correlation scheme in LTE cell search process, Wireless Personal Commun., vol. 70, no. 4, pp. 16031621,2013.
[3] C. Ma, H. Cao, and P. Lin,“ A low-power low-cost design of primary synchronization signal detection”, IEEE Trans. Very Large Scal Integr. (VLSI) Syst., vol. 20,no. 7, pp. 11611166, Jul. 2012.
[4] A. Golnari, G. Sharifan, Y. Amini, and M. Shabany,“A low complexity architecture for the cell search applied to the LTE systems”, in Proc.19th IEEE ICECS, Dec. 2012, pp. 300303
[5] F. Wang, Y. Zhu, and Z. Wang,“A low complexity scheme for S-SCH detection in 3GPP LTE downlink system”, in Proc. IEEE GMC,Oct. 2010, pp. 16.
[6] C.-C. Lee, C.-F. Liao, C.-M. Chen, and Y.-H. Huang,“Design of 4 X 4 MIMO OFDMA receiver with precode codebook search for 3GPP-LTE”,in Proc. IEEE ISCAS, May/Jun. 2010, pp. 39573960.
[7] Y. Kim and K. Chang,“ Complexity optimized CP length pre-decision metric for cell searcher in the downlink of 3GPP LTE system”, in Proc. IEEE 20th Personal, Indoor Mobile Radio Commun., Sep. 2009,pp. 895899
[8] J. I. Mazarico, V. Capdevielle, A. Feki, and V. Kumar, “Detection of synchronization signals in reuse-1 LTE networks”, in Proc. 2nd IEEE WD, Dec. 2009, pp. 15.
[9] P.-Y. Tsai and H.-W. Chang,“A new cell search scheme in 3GPP long term evolution downlink,OFDMA systems”, in Proc. IEEE WCSP,Nov. 2009, pp. 15.
[10]M. J. Shim, J. S. Han, H. J. Roh, and H. J. Choi,“ A Frequency Synchronization method for 3GPP LTE