在公路调频广播中利用IBOC技术实现宽带数据服务  

Utilization of IBOC Technology to Provide Broadband Data Services via Highway FM Radio

作　　者：孟春雷[1] 

机构地区：[1]交通运输部公路科学研究院,北京100088

出　　处：《公路交通科技》2012年第8期149-152,共4页Journal of Highway and Transportation Research and Development

基　　金：交通运输部科技项目(2009-312-233-240)

摘　　要：为解决无线数据广播系统(RDS)数据通信速率较低,难以满足宽带公路数据服务需求的问题,提出在公路调频广播中利用带内同频(IBOC)技术实现宽带数据服务。通过对带内同频的调频/无线数据广播系统(IBOC-FM/RDS)技术的研究,确定了调频多工高速数据广播系统(FMHDS)副载波的频偏范围,然后应用4次环法原理,对载波分量进行恢复和跟踪,并阐述正交相移键控(QPSK)调制和解调过程,最后在Matlab平台上对QPSK进行调制和解调的仿真,计算了在不同信噪比条件下IBOC-QPSK数字传输方式的误码率,通过大量的试验结果表明,在IBOCDAB中QPSK调制具有较高的抗干扰性和传输的可靠性。在公路调频广播中引入IBOC技术使利用调频系统提供宽带数据通信服务成为可能,这将大大提高公路信息服务能力,应用前景广阔。To solve the problem of low communication rate of radio data system （RDS） which cannot meet the requirements of highway broadband data services, it is put forward to achieving broadband data services using the in band on channel （IBOC） technology in the road FM. After studying IBOC-FM/RDS technology, the subcarrier frequency offset range of the frequency modulation high speed data system （FMHDS） was determined. Then, the carrier component was recovered and tracked through applying the principle of the fourth power ring method, and the modulation and demodulation procedure of quadrature phase shift keying （QPSK） was described. Finally, the modulation and demodulation procedure of QPSK was simulated on the MATLAB platform, and the bit error rate （BER） of IBOC-QPSK digital transmission under different signal- noise ratio （SNR） conditions was calculated. A large number of experimental results show that QPSK modulation based on DAB of IBOC has high noise immunity and transmission reliability, it is possible to provide broadband data communications services via FM system in highway FM broadcast, which will significantly improve highway information service capabilities. The application has a great prospect in the future.

关 键 词：交通工程 数字音频广播 带内同频 正交相移键控 

分 类 号：U491[交通运输工程—交通运输规划与管理] TN934.2[交通运输工程—道路与铁道工程]