Time Domain Feedback Equalizer for Fast Fading Channel in OFDM with Scattered Pilot

被引：0

作者：

Nakagawa, Yutaro ^{[1
]}

Sanada, Yukitoshi ^{[1
]}

机构：

[1] Keio Univ, Dept Elect & Elect Engn, Yokohama, Kanagawa 2238522, Japan

来源：

IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES | 2010年 / E93A卷 / 12期

关键词：

OFDM; ISDB; T scattered pilot; ICI; Doppler shift; feedback equalizer; ICI CANCELLATION; INTERFERENCE; RECEIVER;

D O I：

10.1587/transfun.E93.A.2691

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

In this letter a new feedback equalization scheme to sup press inter earner interference (ICI) in an OFDM system using scattered pilot is investigated On a fast fading channel severe ICI occurs due to a Doppler shift and It deteriorates a bit error rate (BER) seriously because of small subcarrier spacing In an ISDB T receiver the equalization is mainly processed in a frequency domain because the scattered pilot is transmitted over the subcarriers However the frequency domain equalization may not suppress severe ICI in the case of the fast fading channel with a large Doppler shift The proposed equalization scheme uses the scattered pilot symbols transformed in a time domain as the reference signal for feedback taps Numerical results through computer simulation show that the pro posed scheme improves the BER performance especially with low carrier to noise ratio (CNR) conditions

引用

页码：2691 / 2695

页数：5

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