4.7 Article

Novel Efficient Multiwavelet-Based Modulation for Downlink NOMA Systems

Journal

IEEE WIRELESS COMMUNICATIONS LETTERS
Volume 10, Issue 6, Pages 1242-1246

Publisher

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LWC.2021.3063122

Keywords

NOMA; Modulation; Downlink; Signal to noise ratio; Peak to average power ratio; Bandwidth; Wireless communication; Non-orthogonal multiple-access (NOMA); multiwavelets; inverse discrete multiwavelet transform (IDMWT); discrete multiwavelet transform (DMWT); peak-to-average-power ratio (PAPR); bit-error-rate (BER); system capacity

Funding

  1. National Natural Science Foundation of China [61801093]

Ask authors/readers for more resources

This work presents a new modulation scheme using multiwavelets for downlink NOMA systems, which can significantly increase system capacity while suppressing PAPR. Compared to other NOMA schemes, it can achieve lower PAPR with slightly higher computational complexity while maintaining the same system capacity. All three NOMA schemes can achieve identical bit-error-rate under the same signal-to-noise ratio condition.
A new modulation scheme using multiwavelets for downlink non-orthogonal multiple-access (NOMA) transceivers is presented in this work. Multiwavelets leading to remarkable spectral diversity are exploited to modulate/demodulate the superimposed multi-user signals in downlink NOMA systems, where the discrete multiwavelet transform and the inverse discrete multiwavelet transform are invoked in the new demodulator of the user equipment and the new modulator of the base station, respectively. The performance evaluation and the computational-complexity analysis of our proposed new NOMA scheme are also conducted. Simulation results demonstrate that the proposed new scheme can significantly increase the system capacity while dramatically suppressing the peak-to-average-power ratio (PAPR) compared to the conventional OFDM-based NOMA approach. Meanwhile, our new scheme can achieve the same system capacity as the scalar-wavelet-based NOMA approach but with a lower PAPR at little extra cost of computational-complexity. All of these three aforementioned NOMA schemes can result in the identical bit-error-rate under the same signal-to-noise ratio condition.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available