基于信號(hào)周期平穩(wěn)特性的OFDM系統(tǒng)時(shí)頻參數(shù)盲估計(jì)算法
A Cyclostationarity-Based Blind Algorithm for Estimating Time-Frequency Parameters in OFDM Systems
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摘要: 該文考慮移動(dòng)通信信道下的OFDM系統(tǒng)同步參數(shù)估計(jì)問(wèn)題,通過(guò)對(duì)接收信號(hào)進(jìn)行采樣,獲得具有周期平穩(wěn)特性的序列,在此基礎(chǔ)上提出一種基于OFDM信號(hào)周期平穩(wěn)特性的系統(tǒng)時(shí)延和頻偏盲估計(jì)算法,并對(duì)算法進(jìn)行時(shí)頻參數(shù)估計(jì)范圍和誤差來(lái)源分析。理論分析和仿真結(jié)果表明,該算法不僅適用于頻率選擇性衰落信道,而且與同類的方法比較,具有更大的頻偏估計(jì)范圍和更高的估計(jì)精度。
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關(guān)鍵詞:
- OFDM;周期平穩(wěn)特性;盲時(shí)頻參數(shù)估計(jì)
Abstract: The problem on the time-frequency parameters estimation in the mobile channel is considered in this paper. For this aim, a blind algorithm is proposed, which is based on the cyclostationarity property of the received signal. Theoralic analysis and simulation results are provided to show that this algorithm is suitable for a frequency selective fading channel. When compared with the other method, its ability to estimate a larger frequency offset and higher estimation resolution are shown. -
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