發(fā)布時(shí)間：2019-03-03 11:28

【摘要】：針對(duì)無(wú)線通信面臨的干擾問(wèn)題,對(duì)多徑衰落信道下的正交頻分復(fù)用(OFDM)系統(tǒng)的抗多音干擾性能進(jìn)行了研究.在給出系統(tǒng)模型的基礎(chǔ)上,對(duì)經(jīng)歷多徑衰落信道后的受干擾接收信號(hào)進(jìn)行分析,計(jì)算了有用信號(hào)和各干擾信號(hào)分量的數(shù)學(xué)統(tǒng)計(jì)特性,并在此基礎(chǔ)上推導(dǎo)了系統(tǒng)的誤比特率公式.對(duì)系統(tǒng)進(jìn)行了誤比特率仿真,仿真結(jié)果表明,理論值與仿真結(jié)果能很好吻合,增大子載波間隔可減弱多音干擾對(duì)系統(tǒng)的干擾效果.另外,當(dāng)干擾信號(hào)功率較大時(shí),全音干擾效果較好;反之則宜集中干擾功率對(duì)部分子載波實(shí)施干擾.
[Abstract]:Aiming at the interference problem of wireless communication, the anti-multitone performance of orthogonal Frequency Division Multiplexing (OFDM) system in multipath fading channel is studied. Based on the model of the system, the received signal after multipath fading channel is analyzed, and the mathematical statistical characteristics of the useful signal and the components of the interference signal are calculated. On the basis of this, the formula of the bit error rate of the system is deduced. The simulation results show that the theoretical values are in good agreement with the simulation results, and the increase of subcarrier spacing can reduce the interference effect of multi-tone interference on the system. In addition, when the interference signal power is large, the full-tone jamming effect is better; on the contrary, the concentrated interference power should be used to interfere part of the molecular carrier.
【作者單位】： 空軍工程大學(xué)防空反導(dǎo)學(xué)院;中國(guó)人民解放軍95948部隊(duì);空軍工程大學(xué)信息與導(dǎo)航學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(60971100)
【分類(lèi)號(hào)】：TN929.537

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 任天鵬;張爾揚(yáng);;OFDM解調(diào)器在若干干擾樣式下的性能分析[J];電子信息對(duì)抗技術(shù);2006年06期

2 趙婷婷;趙玉萍;;一種OFDM系統(tǒng)中的同頻干擾消除算法[J];電子與信息學(xué)報(bào);2011年08期

3 單超;王娜;王萍;張邦寧;;OFDM系統(tǒng)的抗干擾性能研究[J];系統(tǒng)仿真學(xué)報(bào);2006年06期

【共引文獻(xiàn)】

相關(guān)期刊論文 前10條

1 郭富強(qiáng);王呈貴;于雨;;基于OFDM導(dǎo)頻信道估計(jì)的靈巧干擾方法[J];電子信息對(duì)抗技術(shù);2008年03期

2 楊贊;趙輝;趙玉萍;;基于循環(huán)平穩(wěn)性的異構(gòu)網(wǎng)OFDM系統(tǒng)窄帶干擾消除[J];電子與信息學(xué)報(bào);2012年09期

3 郝黎宏;劉偉;;一種改進(jìn)的單音干擾下OFDM系統(tǒng)盲信道估計(jì)算法[J];電訊技術(shù);2013年04期

4 施祥同;王磊;葉春q，

本文編號(hào)：2433655