單載波通信系統(tǒng)的迭代頻域合成均衡算法

喬良; 辛吉榮; 鄭輝

doi:10.11999/JEIT141507

單載波通信系統(tǒng)的迭代頻域合成均衡算法

doi: 10.11999/JEIT141507

1.
(盲信號(hào)處理重點(diǎn)實(shí)驗(yàn)室成都 610041) ②(國(guó)防科學(xué)技術(shù)大學(xué)電子科學(xué)與工程學(xué)院長(zhǎng)沙 410073)

基金項(xiàng)目:

國(guó)家自然科學(xué)基金(61172140)

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- 文章訪(fǎng)問(wèn)數(shù): 1333
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- 被引次數(shù): 0
出版歷程
- 收稿日期: 2014-11-27
- 修回日期: 2015-04-28
- 刊出日期: 2015-08-19

Iterative Frequency Domain Combining Equalization Algorithm for Single Carrier Systems

1.
(National Key Laboratory of Science and Technology on Blind Signal Processing, Chengdu 610041, China)

摘要

摘要: 為提高符號(hào)間干擾(ISI)信道條件下信號(hào)接收的可靠性，該文研究單載波通信系統(tǒng)的多天線(xiàn)空間分集接收問(wèn)題，提出一種迭代頻域合成均衡算法。該算法推導(dǎo)先驗(yàn)信息條件下合成均衡器的頻域傳輸函數(shù)，并借助快速傅里葉變換(FFT)實(shí)現(xiàn)合成均衡器系數(shù)和均衡濾波的高效計(jì)算。仿真結(jié)果表明，相比時(shí)域算法，該算法能夠在不損失性能的前提下，大幅降低運(yùn)算復(fù)雜度。與單載波頻域均衡(SC-FDE)算法相比，該算法不需要在數(shù)據(jù)傳輸?shù)慕Y(jié)構(gòu)中插入循環(huán)前綴(CP)，提高頻譜利用率，能夠直接應(yīng)用于現(xiàn)有單載波通信系統(tǒng)。
- 無(wú)線(xiàn)通信 /
- 空間分集 /
- 頻域均衡 /
- 符號(hào)間干擾
Abstract: To combat the effect of InterSymbol Interference (ISI) while transmitting data over wireless fading channels, the issue of single carrier communication signal receiving with multiple antennas is studied and an iterative frequency domain combining equalization algorithm is proposed. The proposed algorithm derives the theoretical frequency domain transfer function of the combining equalizer with a priori information. An efficient implementation is proposed which employs the Fast Fourier Transform (FFT) to compute the combining equalizer coefficients and equalization filter. Numerical results show that the proposed algorithm reduces complexity enormously with nearly no performance loss compared with the time domain algorithm. Compared with Single Carrier Frequency Domain Equalization (SC-FDE), the Cyclic Prefix (CP) overhead can be avoided, and the computationally efficient frequency domain algorithm can be applied to the existing single carrier communication systems.
- Wireless communication /
- Spatial diversity /
- Frequency domain equalization /
- InterSymbol Interference (ISI)

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