本文選題：超外差接收機(jī) + 盲辨識(shí)補(bǔ)償��； 參考：《信號(hào)處理》2017年09期

【摘要】：提出了一種基于非線性盲辨識(shí)補(bǔ)償處理的新型寬帶超外差接收機(jī)。在時(shí)域,分別提取接收前端輸出信號(hào)的大信號(hào)成分(大功率頻率分量)和小信號(hào)成分(主要包含非線性失真分量),并以大信號(hào)的非線性模型與小信號(hào)的殘差平方和最小作為其非線性行為模型參數(shù)的辨識(shí)準(zhǔn)則,利用加權(quán)迭代改善算法實(shí)現(xiàn)模型參數(shù)的自適應(yīng)提取和更新,最后在線實(shí)時(shí)地對(duì)接收機(jī)輸出信號(hào)進(jìn)行數(shù)字域后補(bǔ)償處理。實(shí)測(cè)結(jié)果表明,在同時(shí)多信號(hào)接收的情況下,該非線性盲辨識(shí)補(bǔ)償處理可將整機(jī)的無(wú)雜散失真動(dòng)態(tài)范圍提高超過(guò)20 dB,極大地提高了在強(qiáng)干擾存在時(shí)對(duì)微弱信號(hào)接收與檢測(cè)的能力。
[Abstract]:A novel wideband ultraheterodyne receiver based on nonlinear blind identification and compensation processing is proposed. In time domain, The large signal components (high power frequency components) and small signal components (mainly including nonlinear distortion components) of the received front-end output signal are extracted, respectively. The nonlinear model of large signal and the sum of residual square of small signal are taken as the minimum. In order to identify the parameters of its nonlinear behavior model, The weighted iterative improvement algorithm is used to realize the adaptive extraction and updating of the model parameters. Finally, the digital domain post-compensation processing of the receiver output signal is carried out in real time. The experimental results show that, in the case of simultaneous multi-signal reception, The nonlinear blind identification and compensation process can improve the dynamic range of the whole machine without spurious distortion by more than 20 dB, and greatly improve the ability to receive and detect weak signals in the presence of strong interference.
【作者單位】： 華中科技大學(xué)電子信息與通信學(xué)院;武漢光電國(guó)家實(shí)驗(yàn)室(籌);
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(11475067) 湖北省科技支撐計(jì)劃項(xiàng)目(2015BCE055) 中央高�；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金資助(2015ZDTD017,2017KFXKJC012) 脈沖強(qiáng)磁場(chǎng)國(guó)家重大科技基礎(chǔ)設(shè)施開放共享課題(2015KF17)支持
【分類號(hào)】：TN851

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