發(fā)布時(shí)間：2018-05-15 20:02

  本文選題：壓縮感知 + 擴(kuò)頻接收機(jī)�。� 參考：《中南大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年08期

【摘要】：為了提升壓縮擴(kuò)頻接收機(jī)的誤碼率性能,提出一種基于支撐集估計(jì)的改進(jìn)壓縮擴(kuò)頻接收機(jī)。改進(jìn)的接收機(jī)首先估計(jì)稀疏信號(hào)的支撐集,然后通過求解閉合表達(dá)式代替原有的重構(gòu)算法來獲取發(fā)送的信息序列,從而達(dá)到降低系統(tǒng)誤碼率的目的。將改進(jìn)的壓縮擴(kuò)頻接收機(jī)應(yīng)用于m W復(fù)合序列擴(kuò)頻信號(hào)的接收,通過檢測m W復(fù)合序列的循環(huán)譜峰值來估計(jì)稀疏信號(hào)的支撐集。研究結(jié)果表明:對(duì)于m W復(fù)合序列,在低信噪比下,通過循環(huán)譜檢測能有效實(shí)現(xiàn)支撐集的估計(jì),且改進(jìn)的壓縮擴(kuò)頻接收機(jī)比現(xiàn)有的壓縮擴(kuò)頻接收機(jī)具有更好的誤碼率性能。
[Abstract]:In order to improve the BER performance of compressed spread spectrum receiver, an improved compression spread spectrum receiver based on support set estimation is proposed. The improved receiver first estimates the support set of the sparse signal and then obtains the transmitted information sequence by solving the closed expression instead of the original reconstruction algorithm so as to reduce the bit error rate (BER) of the system. The improved compression spread spectrum receiver is applied to receive the spread spectrum signal of MW composite sequence, and the support set of sparse signal is estimated by detecting the peak value of cyclic spectrum of MW composite sequence. The results show that for MW composite sequences, cyclic spectrum detection can effectively estimate the support set under low SNR, and the improved compression spread spectrum receiver has better BER performance than the existing compression spread spectrum receiver.
【作者單位】： 哈爾濱工程大學(xué)信息與通信工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(61271263)~~
【分類號(hào)】：TN914.42

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