【摘要】：針對(duì)現(xiàn)有的聯(lián)合信道估計(jì)及OFDM信號(hào)檢測(cè)算法性能不高的問(wèn)題,該文提出一種基于整體最小二乘的聯(lián)合信道估計(jì)及OFDM信號(hào)檢測(cè)算法。該算法首先通過(guò)導(dǎo)頻估計(jì)初始的信道信息,在此基礎(chǔ)上不斷地采用整體最小二乘進(jìn)行OFDM信號(hào)檢測(cè)及信道估計(jì),有效緩解迭代模型誤差的影響,加快了算法迭代的收斂速度,提高了信道估計(jì)的精度,從而降低了OFDM系統(tǒng)的誤碼率。該文推導(dǎo)的信道估計(jì)克拉美羅界及仿真結(jié)果均表明所提出的算法在時(shí)變信道環(huán)境下優(yōu)于現(xiàn)有的聯(lián)合信道估計(jì)及OFDM信號(hào)檢測(cè)算法。
[Abstract]:In order to solve the problem that the existing joint channel estimation and OFDM signal detection algorithms are not high, a joint channel estimation and OFDM signal detection algorithm based on global least square is proposed in this paper. Firstly, the initial channel information is estimated by pilot, on the basis of which the global least square is used for OFDM signal detection and channel estimation, which effectively alleviates the influence of iterative model error, accelerates the convergence speed of algorithm iteration, improves the accuracy of channel estimation, and thus reduces the bit error rate of OFDM system. The proposed algorithm is superior to the existing joint channel estimation and OFDM signal detection algorithms in time-varying channel environment.
【作者單位】： 西安電子科技大學(xué)綜合業(yè)務(wù)網(wǎng)理論及關(guān)鍵技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金(61271299) 高等學(xué)校學(xué)科創(chuàng)新引智計(jì)劃項(xiàng)目(B08038)資助課題
【分類號(hào)】：TN911.23

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