Computer Science ›› 2018, Vol. 45 ›› Issue (8): 88-93.doi: 10.11896/j.issn.1002-137X.2018.08.016

• Network & Communication • Previous Articles     Next Articles

Multicarrier Time Division Multiple Access and System Implementation Based on Fast Convolution Scheme

WANG Lei, LIANG Yan, SUN Shang-yong, WANG Guang-yu   

  1. Chongqing Key Laboratory of Mobile Communication Technology,Chongqing University of Posts and Telecommunications,Chongqing 400065,China
  • Received:2017-06-11 Online:2018-08-29 Published:2018-08-29

Abstract: In order to solve the problems that peak average power ratio(PAPR) of orthogonal frequency division multiplexing(OFDM) is too high,and it is sensitive to the frequency offset,a multicarrier time division multiple access(MC-TDMA) scheme was put forward in this paper.The interleaving mapping and modified discrete Fourier transform(MDFT) filter banks technology can effectively reduce the peak average power ratio (PAPR),and enhance the performance of system against frequency offset.MC-TDMA can be used in the uplink and downlink communication.MC-TDMA was implemented from interleaving mapping and MDFT filter banks in this paper.In order to enhance the flexibility of system,fast convolution scheme was used to achieve MC-TDMA,so that it can better deal with the 5G complex application scenarios.The fast convolution system MC-TDMA was designed from the aspects of system structure and frequency domain sampling filter.The performance of fast convolution MC-TDMA system was simulated and compared with MC-TDMA.The results show that the MC-TDMA system can be realized by the fast convolution scheme,and the perfor-mance of the system is better than that of the MC-TDMA system by flexibly adjusting the parameters such as the overlap factor,the decimation factor and the roll-off factor.

Key words: Decimation factor, Fast convolution(FC), Multicarrier time division multiple access(MC-TDMA), Overlap factor, Roll-off factor

CLC Number: 

  • TN911
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