Optimized design of QPSK-OFDM-based audio transmission system

Ying Ma; Jiansen Peng; Zhongcheng Liu

doi:10.1117/12.3049257

12 November 2024 Optimized design of QPSK-OFDM-based audio transmission system

Ying Ma, Jiansen Peng, Zhongcheng Liu

Author Affiliations +

Proceedings Volume 13395, International Conference on Optics, Electronics, and Communication Engineering (OECE 2024) ; 133954N (2024) https://doi.org/10.1117/12.3049257
Event: International Conference on Optics, Electronics, and Communication Engineering, 2024, Wuhan, China

Abstract

With the rapid development of wireless communication technology, wireless audio transmission plays an increasingly important role in modern life. This article designs and optimizes an audio transmission system based on QPSK modulation and OFDM baseband modulation using eLabRadio software and the eNodeX 10F-DS hardware device. The system incorporates key techniques such as CVSD (Continuous Variable Slope Difference), convolutional coding, and differential coding, with optimized parameter adjustments. Test results show that, after optimization, the system can achieve highquality, real-time audio transmission at distances of 0-7 m with a transmit attenuation of 10 dB and a receive gain of 50 dB. At a fixed distance of 2 m, the best audio transmission is achieved with a receive gain in the range of 50-67 dB and a transmit attenuation of 10 dB.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Ying Ma, Jiansen Peng, and Zhongcheng Liu "Optimized design of QPSK-OFDM-based audio transmission system", Proc. SPIE 13395, International Conference on Optics, Electronics, and Communication Engineering (OECE 2024) , 133954N (12 November 2024); https://doi.org/10.1117/12.3049257

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KEYWORDS

Modulation

Design

Orthogonal frequency division multiplexing

Telecommunications

Wireless communications

Signal processing

Tunable filters

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