Title

一种用于数字音频广播的自干扰抵消方法

Translated Titles

The Performance of Self Interference Cancellation in AM Hybrid IBOC DAB System

Authors

茹国宝(Guo-Bao Ru);杨浩(Hao Yang);胡意顺(Yi-Shun Hu);向倩(Qian Xiang)

Key Words

自干扰抵消 ; 正交频分复用 ; 带内同频 ; 同频干扰 ; self interference cancellation ; OFDM orthogonal frequency division multiplexing ; In-Band On-Channel ; interference in the same band

PublicationName

武漢大學學報(理學版)

Volume or Term/Year and Month of Publication

51卷5期(2005 / 10 / 24)

Page #

647 - 651

Content Language

簡體中文

Chinese Abstract

针对混合模式的调幅带内同频数字音频广播(AM IBOC DAB)系统中的同频干扰问题,提出了一种自干扰抵消的方法,该方法利用正交频分复用(OFDM)技术中相邻子载波频率接近的特性,通过对相邻的两个子载波接收到的数据中的模拟干扰做干扰自抵消,从而减小了模拟信号对数字信号的同频干扰。在此基础上,在不同的载波组上采用不用调制制式,进一步提高了系统的传输效率。仿真实验结果表明:利用该方法可以取得5dB的性能增益,同时可以提高系统的传输效率,保证了模拟音频信号和数字音频信号在同频带上的并行传输。

English Abstract

In order to minimize the interference between digital audio signals and analog audio signals in the same band in AM Hybrid In-Band On-Channel (IBOC) system, a self interference cancellation method based on OFDM (orthogonal frequency division multiplexing) is introduced in this paper. Experiment shows that this method can minimize the interference to digital audio digital signals and using different modulation modes in different subcarriers based on the method can both minimize the interference in the same band and improve transmission efficiency of system.

Topic Category 基礎與應用科學 > 基礎與應用科學綜合
生物農學 > 生物科學
生物農學 > 生物環境與多樣性
工程學 > 市政與環境工程