Computer Science

Computer Science ›› 2020, Vol. 47 ›› Issue (10): 263-268.doi: 10.11896/jsjkx.190800043

• Computer Network • Previous Articles     Next Articles

Simulation and Analysis on Improved NC-OFDM Algorithm

ZHOU Hui-ting1, ZHOU Jie1,2   

  1. 1 College of Electronic & Information Engineering,Nanjing University of Information Science and Technology,Nanjing 210044,China
    2 Department of Engineering,National Niigata University,Niigata 950-2181,Japan
  • Received:2019-08-09 Revised:2019-11-01 Online:2020-10-15 Published:2020-10-16
  • About author:ZHOU Hui-ting,born in 1995,master.Her main research interests include wireless communication theory and OFDM communication.
    ZHOU Jie,born in 1964,professor,doctoral supervisor.His main research interests include mobile communication theory,wireless sensor network and radio access network.
  • Supported by:
    National Natural Science Foundation of China (61471153,61771248) and Jiangsu Provincial Research Scheme of Natural Science for Higher Education Institute(14KJA510001)

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Abstract: Orthogonal Frequency Division Multiplexing (OFDM) is the most promising modulation technology so far.It has been adopted by most wireless and wired communication standards.N-coutinuous Orthogonal Frequency Division Multiplexing is a combination of OFDM and cognitive radio technology,but its sidelobe suppression has always been a problem to be solved.In order to reduce the complexity of the algorithm and receiver without affecting the sidelobe suppression performance,a symbol-filled OFDM time-domain algorithm is proposed,it inserts n- continuous OFDM correction symbols only into the protection interval and seamlessly connects each OFDM symbol,thus suppressing side lobes.The simulation shows that the proposed algorithm does not affect the sidelobe suppression performance,and is easy to implement.The complexity is significantly lower than the traditional N-continuous OFDM system.In different channels of K=72,Signal BER reduction by 5dB.The simulink of MATLAB is used to simulate the simulation of N-coutinuous OFDM systems in FPGA.FPGA has great flexibility,and has higher computing speed and smaller area in digital signal processing.Low cost,low risk,time advantage.

Key words: FPGA, NC-OFDM, OFDM, Side lobe suppression, System simulation

CLC Number: 

  • TN91
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