畢業(yè)論文基于fpga的mc一cdma基帶系統(tǒng)的實(shí)現(xiàn)-展示頁(yè)
2025-07-03 19:56本頁(yè)面
【正文】 能和實(shí)現(xiàn)復(fù)雜度，設(shè)計(jì)了不同的解調(diào)方法。將自適應(yīng)調(diào)制技術(shù)引入空域復(fù)用MOMC一CDMA系統(tǒng)能夠充分利用無(wú)線(xiàn)信道容量，更有效地提高信息傳輸速率。作者簽字 葛立揚(yáng) 孫科學(xué) 王曌 日期： 2010年7月23日基于FPGA的MC一CDMA基帶系統(tǒng)的實(shí)現(xiàn)FPGA Implementation of MC一CDMA Base一band System葛立揚(yáng) 孫科學(xué) 王曌（南京郵電大學(xué) 自動(dòng)化學(xué)院，江蘇 南京 210046）摘要摘要:MIMO技術(shù)、多載波技術(shù)與鏈路自適應(yīng)技術(shù)是未來(lái)移動(dòng)通信系統(tǒng)最值得關(guān)注的幾種物理層技術(shù)。對(duì)本文的研究工作做出重要貢獻(xiàn)的個(gè)人和集體，均已在文中以明確方式注明。論文原創(chuàng)性聲明本人鄭重聲明：此處所提交的論文《基于FPGA的MC一CDMA基帶系統(tǒng)的實(shí)現(xiàn)》，是本人在導(dǎo)師指導(dǎo)下，在攻讀學(xué)士學(xué)位期間進(jìn)行研究工作所取得的成果。據(jù)本人所知，論文中除已注明部分外不包含他人已發(fā)表或撰寫(xiě)過(guò)的研究成果。本聲明的法律結(jié)果將完全由本人承擔(dān)。M0MC技術(shù)在提高系統(tǒng)頻譜利用率方面性能卓越，多載波CDMA技術(shù)則能有效地對(duì)抗頻率選擇性衰落，將MIMO技術(shù)與MC一CDMA方案相結(jié)合，構(gòu)成空域復(fù)用MC一CDMA系統(tǒng)，將在很大程度上提高系統(tǒng)的性能和容量。完成基于FPGA的空域復(fù)用 MIMOMC一CDMA系統(tǒng)的基帶信號(hào)處理平臺(tái)的設(shè)計(jì)與實(shí)現(xiàn)的任務(wù)。在MC一CDMA調(diào)制的實(shí)現(xiàn)方面，借用了OVSF碼的產(chǎn)生方法來(lái)實(shí)現(xiàn)Walsh碼的產(chǎn)生，可配置產(chǎn)生32種不同的擴(kuò)頻碼字。在具體實(shí)現(xiàn)過(guò)程中，充分利用各種基本運(yùn)算的硬件實(shí)現(xiàn)方式，結(jié)合各類(lèi)IP核及FPGA芯片的特點(diǎn)，合理規(guī)劃矩陣求逆、矩陣相乘等運(yùn)算環(huán)節(jié)，在保證性能的前提下，實(shí)現(xiàn)了以較少的資源消耗量實(shí)現(xiàn)了接收機(jī)檢測(cè)算法。關(guān)鍵詞:MIMO，MC一CDMA，基帶系統(tǒng)，F(xiàn)PGA分類(lèi)號(hào): ABSTRACTABSTRACT:MIMO,multicatrier and linkadaptive Inodulation techniques are a few key kinds of physical layer techniqucs infuture wireless munication mission technique have a excellent performance in promoting spectral efficiencies, multicatrier and CDMA tcchniquc can alleviate the frcqucy一sclective fading effect effectively. Combinating MIMO technique and MC一CDMA scheme into MIMO MC一CDMA system will improve the performance and capacity of a mobile munications the adaptive modulation technique into MIMO MC一CDMA system can take full advantage of wireless channcl capacity,and improve data rates more effectively.The work fulfillish the study of adaptive cross layer wireless transmission Technology in FPGA Implementation of MC一CDMA task 15 to plete the design and implementation of a FPGA一based basebandsignal Processing Platform for FPGA Implementation of一CDMA Base一band System.The work in this paper contains the design and implementation of a generic modem supporting QPSK,16QAM and 64QAM modulation modes, the design and implementation of a VBALSTcodec,the design and implementation of a MC一CDMA modem, the design and implementation of ZF VBLAST directional goritllln,the design all implelnentation of the clock management module crossing six clock domains, at last achieved the final structure of the digital base一band transceiver for a airspace multiplexing MI MOMC一CDMAsystem.In the design of the generic modem, considng the realization of demodulator perfonnance and plexity, different demodulation methods were designed based on the modulation with the different constellation mapping characteristics. The realization of the MC一CDMA modem,used the method of generating OVSF code to Generate the code,and32 kinds of spreading codes can be configured for different characteristics.In order to reduce the system plexity, increase the system practical value, ZFdetection algorithm was adopted because of its low implementation plexity. The Goreville block algorithm was selected as a matrix inversion method in ZF detection. In the Profess of the realization，make full use of hardware approaches for basic puting，eonlbined with various the soft IPcoreand the characteristics of FPGA chips，reasonable Planned matrix inversion，matrix multiplication Operations，achieved a receiver detection algorithm with a consumption resources.This Paper use a hardware’s emulation model for MIMO channel to achieve the Joint debugging and functional verification，and pared with the software simulation results obtained a good Performance.KEYWORDS:MIMO，MC一CDMA，Base一band System，F(xiàn)PGACLASSNO:1發(fā)射機(jī)基帶處理系統(tǒng)的設(shè)計(jì)實(shí)現(xiàn)發(fā)射機(jī)基
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