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Volume 44 Issue 4
Apr.  2022
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LI Yubo, WANG Yahui, YU Lixin, LIU Kai. Binary Spreading Sequences of Lengths Non-Power-of-Two for Uplink Grant-Free Non-Orthogonal Multiple Access[J]. Journal of Electronics & Information Technology, 2022, 44(4): 1402-1411. doi: 10.11999/JEIT210293
Citation: LI Yubo, WANG Yahui, YU Lixin, LIU Kai. Binary Spreading Sequences of Lengths Non-Power-of-Two for Uplink Grant-Free Non-Orthogonal Multiple Access[J]. Journal of Electronics & Information Technology, 2022, 44(4): 1402-1411. doi: 10.11999/JEIT210293

Binary Spreading Sequences of Lengths Non-Power-of-Two for Uplink Grant-Free Non-Orthogonal Multiple Access

doi: 10.11999/JEIT210293
Funds:  The Natural Science Foundation of Hebei Province(F2020203043, F2021203040), The Science and Technology Research Project of Colleges and Universities in Hebei Province (ZD2020179, ZD2021105)
  • Received Date: 2021-04-09
  • Rev Recd Date: 2021-08-24
  • Available Online: 2021-09-08
  • Publish Date: 2022-04-18
  • In order to solve the problem of mass access and how to improve spectrum efficiency in 5G massive Machine-Type Communication (mMTC) scenario, for the uplink grant-free Non-Orthogonal Multi-Access(NOMA) system, new sets of non-orthogonal binary spreading sequences with low Peak Average Power Ratio(PAPR) and lengths non-power-of-two is proposed by inserting elements into binary Golay sequences using insertion function. Simulation results confirm that the resulting sequence sets has low coherence, which provides reliable performance for active user detection based on Compressed Sensing (CS). Compared with the traditional Zadoff-chu sequences, the new binary sequence sets has a smaller alphabet set, which is easy to implement. Moreover, the resultanted sequences exhibit the PAPR of at most 4, which is lower than those for Gaussian and Zadoff-Chu sequences. Therefore, the problem of high peak-to-power ratio in time domain can be solved effectively.
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