并行組合擴(kuò)頻通信系統(tǒng)的自適應(yīng) 變速率數(shù)據(jù)傳輸模型

高維珉 張永翼 蘇愛東

摘? 要： 針對并行組合擴(kuò)頻系統(tǒng)定速傳輸速率低的問題，文中提出一種結(jié)合信道估計(jì)技術(shù)的自適應(yīng)變速率數(shù)據(jù)傳輸模型。在通信過程中當(dāng)信道狀況發(fā)生改變時(shí)，通過信道估計(jì)反饋回來的信噪比改變選擇的PN碼序列數(shù)[r]，從而實(shí)現(xiàn)控制數(shù)據(jù)傳輸速率。仿真結(jié)果表明，在大信噪比的情況下選擇大[r]值，小信噪比的時(shí)候選擇小的[r]值進(jìn)行通信，可以保證誤碼率在10-3以下，同時(shí)提高了系統(tǒng)的平均數(shù)據(jù)傳輸速率。

關(guān)鍵詞： 并行組合擴(kuò)頻系統(tǒng); 數(shù)據(jù)傳輸模型; 變速率傳輸; 信道估計(jì); 數(shù)據(jù)傳輸控制; 誤碼率降低

中圖分類號： TN929.5?34? ? ? ? ? ? ? ? ? ? ? ? 文獻(xiàn)標(biāo)識碼： A? ? ? ? ? ? ? ? ? ? ? ? ?文章編號： 1004?373X（2020）13?0032?04

Adaptive variable rate data transmission model for parallel combinatory

spread spectrum communication systems

GAO Weimin， ZHANG Yongyi， SU Aidong

（Air Force Communication NCO Academy， Dalian 116600， China）

Abstract： An adaptive variable rate data transmission model is proposed in this paper to improve the constant speed transmission rate of the parallel combinatory spread spectrum （PCSS） communication system， in which the channel estimation technology is combined with. When the channel condition changes during communication， the selected number of PN code sequences [r] is changed according to the signal?to?noise ratio fed back through the channel estimation， so as to realize the data transmission rate control. The simulation results show that the selection of large [r] value in the case of large SNR， and small [r]value in the case of small SNR for communication can ensure that the bit error rate is below 10-3， which can also improve the average data transmission rate of the system.

Keywords： PCSS system; data transmission model; variable rate transmission; channel estimation; data transmission control; bit error rate reduction