The Research of Adaptive Modulation Technology in OFDM System-Reference-Cited by-同舟云学术

The Research of Adaptive Modulation Technology in OFDM System

Published:2022 Issue: Volume: Page:739-748
ISSN:1876-1100
Container-title:Proceeding of 2021 International Conference on Wireless Communications, Networking and Applications
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Author:

Zhang Xiuyan,Tao Guobin

Abstract

AbstractOrthogonal frequency division multiplexing (OFDM) as a special multi-carrier transmission technology has good resistance to narrow-band interference and frequency selective fading ability. Compared with traditional modulation techniques, adaptive modulation can enhance bandwidth efficiency and system capacity. Therefore, applying adaptive modulation in OFDM systems can take full advantage of spectrum resources, and it is suitable for the high-speed and reliable mobile communication systems in the future. The purpose of this paper is to improve traditional OFDM adaptive algorithms (Hughes-Hartogs, Chow) to realize bits allocation, power allocation better. In this paper, simulation results demonstrated that the improved Levin-Campello algorithm lowers algorithm’s complexity greatly and owns better flexibility, at the same time, it guarantees good the bit error rate (BER) performance and can be applied to speech communication (fixed rate) and data communication (variable rate) in wireless communication systems.

Publisher

Springer Nature Singapore

Link

https://link.springer.com/content/pdf/10.1007/978-981-19-2456-9_74

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