基于IEEE802.11ad的OFDM線性擬合頻偏估計
發(fā)布時間:2018-09-19 10:07
【摘要】:提出了一種基于IEEE802.11ad的正交頻分復(fù)用(OFDM)頻偏估計算法,該算法將接收到的訓(xùn)練序列與本地保存的訓(xùn)練序列共軛相乘,對其相位角進行線性擬合,得到的斜率經(jīng)過簡單計算即得歸一化頻偏.通過數(shù)據(jù)消噪和分組對算法進一步改進,使得低信噪比下的估計性能得到改善.Matlab仿真表明:在高斯(加性高斯白噪聲)信道和60GHz多徑信道下,改進的線性擬合方法性能穩(wěn)定,頻偏估計精度比傳統(tǒng)的時頻域估計高1個數(shù)量級,當(dāng)信噪比為0dB時,頻偏估計的均方差達到10-4數(shù)量級,從而滿足了OFDM系統(tǒng)的技術(shù)要求.
[Abstract]:An orthogonal frequency division multiplexing (OFDM) frequency offset estimation algorithm based on IEEE802.11ad is proposed. The received training sequence is conjugated with the locally preserved training sequence, and the phase angle is fitted linearly. The slope is calculated simply to get the normalized frequency offset. By further improving the algorithm of data de-noising and grouping, the performance of estimation under low SNR is improved. MATLAB simulation shows that the performance of the improved linear fitting method is stable in Gao Si (additive Gao Si white noise) channel and 60GHz multipath channel. The accuracy of frequency offset estimation is one order of magnitude higher than that of traditional time-frequency estimation. When the SNR is 0dB, the RMS of frequency offset estimation reaches 10-4 order of magnitude, which satisfies the technical requirements of OFDM system.
【作者單位】: 南開大學(xué)電子信息與光學(xué)工程學(xué)院;南開大學(xué)天津市信息光子材料與技術(shù)重點實驗室;
【基金】:高等學(xué)校博士學(xué)科點專項科研基金資助項目(20110031110028) 天津市應(yīng)用基礎(chǔ)與前沿技術(shù)研究計劃資助項目(13JCZDJC26000,13JCQNJC01000)
【分類號】:TN929.53
[Abstract]:An orthogonal frequency division multiplexing (OFDM) frequency offset estimation algorithm based on IEEE802.11ad is proposed. The received training sequence is conjugated with the locally preserved training sequence, and the phase angle is fitted linearly. The slope is calculated simply to get the normalized frequency offset. By further improving the algorithm of data de-noising and grouping, the performance of estimation under low SNR is improved. MATLAB simulation shows that the performance of the improved linear fitting method is stable in Gao Si (additive Gao Si white noise) channel and 60GHz multipath channel. The accuracy of frequency offset estimation is one order of magnitude higher than that of traditional time-frequency estimation. When the SNR is 0dB, the RMS of frequency offset estimation reaches 10-4 order of magnitude, which satisfies the technical requirements of OFDM system.
【作者單位】: 南開大學(xué)電子信息與光學(xué)工程學(xué)院;南開大學(xué)天津市信息光子材料與技術(shù)重點實驗室;
【基金】:高等學(xué)校博士學(xué)科點專項科研基金資助項目(20110031110028) 天津市應(yīng)用基礎(chǔ)與前沿技術(shù)研究計劃資助項目(13JCZDJC26000,13JCQNJC01000)
【分類號】:TN929.53
【參考文獻】
相關(guān)期刊論文 前3條
1 董孝東;;基于FFT的突發(fā)通信載波大頻偏估計算法[J];現(xiàn)代電子技術(shù);2013年01期
2 張力;汪涵;高丹;王營冠;;OFDM系統(tǒng)中利用CAZAC序列的時域時頻同步方案[J];現(xiàn)代電子技術(shù);2013年05期
3 Sai Shankar N;Debashis Dash;Hassan El Madi;Guru Gopalakrishnan;;WiGig and IEEE 802.11ad for Multi-Gigabyte-Per-Second WPAN and WLAN[J];ZTE Communications;2012年04期
【共引文獻】
相關(guān)期刊論文 前4條
1 孟慶萍;周新力;田偉;;基于FFT和長時延自相關(guān)函數(shù)的頻偏估計方法[J];計算機工程與設(shè)計;2013年03期
2 楊永斌;;計算機網(wǎng)格技術(shù)在數(shù)字圖書館建設(shè)中的應(yīng)用探討[J];重慶工商大學(xué)學(xué)報(自然科學(xué)版);2010年05期
3 孫s,
本文編號:2249825
本文鏈接:http://sikaile.net/kejilunwen/wltx/2249825.html
最近更新
教材專著