%0 Journal Article %A BAO Jianrong %A JIANG Bin %A LI Yangguang %A LIU Chao %T Frequency offset estimation algorithm of time domain synchronous orthogonal frequency division multiplexing based on correlations of cyclic pseudo-random noise %D 2017 %R 10.11772/j.issn.1001-9081.2017.07.1877 %J Journal of Computer Applications %P 1877-1882 %V 37 %N 7 %X Concerning the high complexity of the traditional frequency estimation algorithm, a new frequency offset estimation algorithm of Time Domain Synchronous Orthogonal Frequency Division Multiplexing (TDS-OFDM) with low complexity for power line communication was proposed. Firstly, the characteristics of power line network were analyzed, and a frame head was constructed with three equal-length cyclic Pseudo-random Noise (PN) sequences. Secondly, the frame head and body were based on Binary Phase Shift Keying (BPSK) and Quadrature Amplitude Modulation (QAM) modes. Finally, compared with the traditional algorithms based on Cyclic Prefix (CP) or general PN, only the lengths of part of PN were calculated, so the number of autocorrelations was reduced, and better performance could be guaranteed. The simulation results show that, at Bit Error Rate (BER) of 10-4, the improved algorithm has about 5 dB and 1 dB gains while comparing with the algorithms based on CP and general PN, respectively. And compared with algorithm with general PN, when the lengths of inserted sequence and cyclic sequence were 420 and 165, the number of correlations per frame was reduced by 1186. The theoretical analysis and simulation results show that proposed algorithm can effectively reduce the computational complexity and cost of process, meanwhile improves the communication rate. %U http://www.joca.cn/EN/10.11772/j.issn.1001-9081.2017.07.1877