基于OFDM的短波电台改进方案设计

Design of enhancement project for shortwave radio based on OFDM

短波电台作为远距离传输的重要载体,有着非常重要的作用。然而传统短波电台受短波信道固有缺点的限制,传输速率较低,频带利用率也不高。正交频分复用(OFDM)技术的各子载波之间的正交性使得其频谱可重叠从而提高了频带利用率,同时能有效对抗频率选择性衰落。为了有效提高短波电台的性能,可以采用OFDM技术。分析了OFDM的基本原理,提出了基于OFDM的短波电台性能增强方案。

As the carrier for long space transmission,shortwave radio plays a very important role.However,the shortwave channel＇s inhere disadvantages restrict the traditional shortwave radio,which makes the speed of transmission very low and the utilization of frequency band not high.The orthogonal conditions among each carrier frequency of OFDM could make its spectrum overlapped,therefore improve the spectrum availability,at the same time it also has good resistance to the frequency selective declining.So in order to improve the shortwave communication system＇s data transport rate efficiently,the OFDM technology can be used properly.This paper analyses the keystone of OFDM,puts forward the performance enhancement project for shortwave radio.