Low-Complexity Channel Estimation for ISDB-T Over Doubly-Selective Fading Channels

被引:0
|
作者
Ma, Ziji [1 ]
Liu, Hongli [1 ]
Higashino, Takeshi [2 ]
Okada, Minoru [2 ]
Furudate, Hideki [3 ]
机构
[1] Hunan Univ, Changsha 410082, Hunan, Peoples R China
[2] Nara Inst Sci & Technol, Nara 6300101, Japan
[3] Fujitsu Labs, Kawasaki, Kanagawa 2210053, Japan
来源
2013 INTERNATIONAL SYMPOSIUM ON INTELLIGENT SIGNAL PROCESSING AND COMMUNICATIONS SYSTEMS (ISPACS) | 2013年
关键词
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暂无
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
Orthogonal Frequency Division Multiplexing (OFDM) technique that has been adopted by ISDB-T system is an effective multi-carrier modulation technique due to its robustness for multi-path fading channels. Recently, in the case of the doubly selective fading channel that is usually caused by high-speed moving reception, a new method named Compressed Sensing (CS) has been proposed to estimate the channel state information (CSI) for OFDM system, which can improve the accuracy of estimate with less pilots. However, high computational complexity of CS makes it difficult to implement for practical applications. Although orthogonal matching pursuit has been proposed that can reduce the computational complexity of CS, the improvement is still not enough. In this paper, therefore, a new scheme of channel estimation by using modified orthogonal matching pursuit (MOMP) is proposed that can further reduce the computational complexity as well as keep accurate estimation performance, comparing with the conventional OMP scheme. The computer simulation demonstrates its effect on channel estimation for ISDB-T system.
引用
收藏
页码:114 / 118
页数:5
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