Beamforming Based Receiver Scheme for DVB-T2 System in High Speed Train Environment

被引：21

作者：

Yang, Lihua ^{[1
]}

Ren, Guangliang ^{[1
]}

Zhai, Wantao ^{[1
]}

Qiu, Zhiliang ^{[1
]}

机构：

[1] Xidian Univ, State Key Lab Integrated Serv Networks, Xian 710071, Peoples R China

来源：

IEEE TRANSACTIONS ON BROADCASTING | 2013年 / 59卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Beamforming; DVB-T2; high-speed-train (HST) environment; multiple Doppler frequency offsets; CARRIER FREQUENCY OFFSET; OFDM; DIVERSITY; RECEPTION;

D O I：

10.1109/TBC.2012.2221612

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this paper, the received signal from the different base stations (BSs) of the second generation of Terrestrial Digital Video Broadcasting (DVB-T2) in the high-speed-train (HST) scenario is modeled as a fast time-varying signal with the multiple Doppler frequency offsets. The interference caused by the multiple Doppler frequency offsets and the channel variations, and the signal to interference plus noise ratio of the received signal, are derived for the DVB-T2 receiver. The results of the theoretical analysis show that the interference greatly degraded the performance of the DVB-T2 system. To suppress the interference, we proposed a beamforming based receiver scheme for DVB-T2 system. By using the new signal processing scheme for the received signal vector from the antenna array, one can separate the received signal with the multiple Doppler frequency offsets into the multiple signals, each of which is with a single Doppler frequency offset. The separated signals are compensated by the corresponding Doppler frequency offsets and equalized by the estimated channel responses respectively, then combined into a signal to be demodulated. The results of the simulation show that the proposed scheme can effectively suppress the interference and greatly improve the performance of the DVB-T2 system in the HST environment.

引用

页码：146 / 154

页数：9

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