【摘要】：隨著新一代無(wú)線通信系統(tǒng)的商用,各大運(yùn)營(yíng)商掀起了新網(wǎng)絡(luò)的建設(shè)高潮。如果,僅通過(guò)密集架設(shè)基站,來(lái)完成網(wǎng)絡(luò)的覆蓋,勢(shì)必會(huì)造成資源的浪費(fèi)。作為基站建網(wǎng)的補(bǔ)充,ICS(Interference Cancel System,干擾抑制系統(tǒng))無(wú)線通信數(shù)字直放站,在運(yùn)營(yíng)商的網(wǎng)絡(luò)建設(shè)中發(fā)揮著重要作用。本文在介紹ICS無(wú)線通信數(shù)字直放站基本工作原理的基礎(chǔ)上,對(duì)其中的兩項(xiàng)關(guān)鍵技術(shù):預(yù)處理技術(shù)和RLS(Recursive Least Square,遞歸最小二乘)自適應(yīng)濾波技術(shù),進(jìn)行了研究。預(yù)處理技術(shù)部分,研究了耦合回波信號(hào)延時(shí)估計(jì)技術(shù),并提出了耦合回波信道多徑位置估計(jì)技術(shù)。耦合回波信號(hào)延時(shí)估計(jì)技術(shù),通過(guò)廣義互相關(guān)運(yùn)算,提升了延時(shí)估計(jì)的準(zhǔn)確度;耦合回波信道多徑位置估計(jì)技術(shù),通過(guò)利用已估路徑的先驗(yàn)信息,提高了待估路徑信噪比,使多徑位置估計(jì)更為準(zhǔn)確。RLS自適應(yīng)濾波技術(shù)部分,主要包括對(duì)現(xiàn)有RLS算法的研究,和對(duì)現(xiàn)有RLS算法的線性約束改進(jìn)。該部分,首先介紹了現(xiàn)有的傳統(tǒng)RLS算法、快速橫向RLS算法和穩(wěn)定快速橫向RLS算法。然后,基于耦合回波信道的特點(diǎn),提出了對(duì)傳統(tǒng)RLS算法和穩(wěn)定快速橫向RLS算法的線性約束改進(jìn)。隨后,本文分別對(duì)預(yù)處理技術(shù)和RLS自適應(yīng)濾波技術(shù),進(jìn)行了MATLAB仿真。仿真結(jié)果顯示,本文提出的耦合回波信道多徑位置估計(jì)技術(shù),和改進(jìn)的RLS自適應(yīng)濾波算法,均表現(xiàn)出較優(yōu)性能,具有較強(qiáng)的應(yīng)用價(jià)值。最后,本文基于FPGA,對(duì)預(yù)處理技術(shù)和改進(jìn)的穩(wěn)定快速橫向RLS算法,進(jìn)行了硬件功能的仿真。結(jié)果顯示,本文提出的耦合回波信道多徑位置估計(jì)技術(shù),實(shí)現(xiàn)了對(duì)硬件資源的節(jié)約。
[Abstract]:With the new generation of wireless communication system commercial, the major operators set off a new network construction climax. If only dense base stations are installed to complete the coverage of the network, there will be a waste of resources. As a complementary, ICS (Interference Cancel System, interference suppression system for base station construction, wireless communication digital repeater plays an important role in the network construction of operators. On the basis of introducing the basic working principle of ICS wireless communication digital repeater, two key technologies, pre-processing technology and RLS (Recursive Least Square, recursive least squares (RLS) adaptive filtering technique, are studied in this paper. In the pre-processing technology, the coupling echo signal delay estimation technique is studied, and the multi-path position estimation technique of coupled echo channel is proposed. Coupled echo signal delay estimation technology, through the generalized cross-correlation operation, improves the accuracy of delay estimation; Coupled echo channel multi-path position estimation technique improves the signal-to-noise ratio of the estimated path by using the priori information of the estimated path, and makes the multipath position estimation more accurate. The part of the adaptive filtering technique includes the research of the existing RLS algorithm. And to improve the existing RLS algorithm with linear constraints. In this part, the traditional RLS algorithm, the fast lateral RLS algorithm and the stable and fast transverse RLS algorithm are introduced. Then, based on the characteristics of the coupled echo channel, a linear constraint improvement to the traditional RLS algorithm and the stable and fast transverse RLS algorithm is proposed. Then, the pre-processing technology and RLS adaptive filtering technology are simulated by MATLAB. The simulation results show that the proposed multi-path position estimation technique for coupled echo channels and the improved RLS adaptive filtering algorithm both show excellent performance and have strong application value. Finally, the hardware function simulation is carried out based on FPGA, pretreatment technology and improved stable and fast transverse RLS algorithm. The results show that the multi-path position estimation technique proposed in this paper can save the hardware resources.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TN929.5

【參考文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 錢(qián)銳;ICS無(wú)線數(shù)字直放站的系統(tǒng)設(shè)計(jì)與實(shí)現(xiàn)[D];電子科技大學(xué);2011年

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本文編號(hào)：2434278