本文關(guān)鍵詞：軟件無線電的多模中頻設(shè)計(jì)與FPGA實(shí)現(xiàn)　出處：《重慶郵電大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 軟件無線電 多模中頻 移動(dòng)通信 多模射頻 現(xiàn)場(chǎng)可編程門陣列

【摘要】：隨著無線通信技術(shù)的飛速發(fā)展,移動(dòng)通信系統(tǒng)也快速地更新?lián)Q代。而傳統(tǒng)的移動(dòng)通信設(shè)備主要依賴于固定的硬件電路,導(dǎo)致移動(dòng)通信系統(tǒng)的兼容性很差并且無法平滑升級(jí)。軟件無線電技術(shù)以硬件為基礎(chǔ)、軟件為核心的思想可以很好地解決通信系統(tǒng)的平滑升級(jí)和兼容性問題。而數(shù)字中頻技術(shù)是軟件無線電技術(shù)的核心技術(shù),也是“瓶頸”問題的關(guān)鍵所在。基于此,本文對(duì)數(shù)字中頻算法進(jìn)行研究,設(shè)計(jì)可以兼容多種通信模式的多模中頻融合方案,并對(duì)多模中頻系統(tǒng)進(jìn)行FPGA實(shí)現(xiàn)。首先,設(shè)計(jì)了多模中頻融合方案。在帶通采樣定理、多速率信號(hào)處理和數(shù)字信號(hào)正交變換等數(shù)字中頻理論的基礎(chǔ)上,對(duì)單模數(shù)字中頻的結(jié)構(gòu)進(jìn)行了深入研究,采用了復(fù)用技術(shù)和靈活的配置技術(shù)設(shè)計(jì)了多模中頻融合的方案,通過與并行多模中頻方案對(duì)比,該方案不僅可以很好地兼容多種通信系統(tǒng),而且還可以節(jié)約大量硬件資源。其次,進(jìn)行了多模中頻算法的設(shè)計(jì)與仿真驗(yàn)證。對(duì)多模中頻的核心模塊數(shù)字混頻器與抗混疊濾波器進(jìn)行了深入的研究和優(yōu)化,根據(jù)多模中頻融合方案和5種通信系統(tǒng)的信號(hào)特性,設(shè)計(jì)了多模中頻的系統(tǒng)參數(shù)與MATLAB仿真算法,并完成了算法仿真與驗(yàn)證,仿真結(jié)果驗(yàn)證了多模中頻算法的有效性。然后,以軟件無線電平臺(tái)為依托,進(jìn)行了多模中頻系統(tǒng)的設(shè)計(jì)與FPGA實(shí)現(xiàn)。對(duì)多模中頻的核心模塊設(shè)計(jì)進(jìn)行了改進(jìn):數(shù)字混頻器的設(shè)計(jì)采用了改進(jìn)的流水線型CORDIC電路;高階FIR濾波器的設(shè)計(jì)采用了改進(jìn)的DA算法代替乘累加式實(shí)現(xiàn)方法;CIC濾波器與HBF濾波器的設(shè)計(jì)增加了串行雙通道和參數(shù)配置的功能。針對(duì)平臺(tái)的射頻配置,本方案采用了ROM查找表和狀態(tài)機(jī)相結(jié)合的方法設(shè)計(jì)了多模射頻配置系統(tǒng),并詳細(xì)介紹了射頻芯片配置接口和外圍接口EMIF、McBSP、網(wǎng)口的設(shè)計(jì)與測(cè)試。最后,搭建軟件無線電硬件測(cè)試平臺(tái),對(duì)多模中頻系統(tǒng)的接收通路和發(fā)送通路進(jìn)行了系統(tǒng)級(jí)測(cè)試,測(cè)試結(jié)果驗(yàn)證了多模中頻、多模射頻配置和外圍接口等設(shè)計(jì)與FPGA實(shí)現(xiàn)的正確性。
[Abstract]:With the rapid development of wireless communication technology, mobile communication systems are also rapidly updated, while the traditional mobile communication devices mainly rely on fixed hardware circuits. This results in poor compatibility and inability to smooth upgrade of mobile communication systems. Software radio technology is based on hardware. The idea of software as the core can solve the problem of smooth upgrading and compatibility of communication system, and digital if technology is the core technology of software radio technology and the key of "bottleneck" problem. In this paper, the digital if algorithm is studied, and a multi-mode if fusion scheme is designed, which can be compatible with many communication modes, and the multi-mode if system is implemented by FPGA. Based on the theory of band-pass sampling, multi-rate signal processing and orthogonal transform of digital signal, the structure of single-mode digital if is deeply studied. The multi-mode if fusion scheme is designed by using multiplexing technology and flexible configuration technology. Compared with the parallel multi-mode if scheme, the scheme can not only be compatible with many communication systems. And can save a lot of hardware resources. Secondly, the design and simulation of the multi-mode if algorithm are carried out. The core module of the multi-mode if digital mixer and anti-aliasing filter are studied and optimized. According to the multi-mode intermediate frequency fusion scheme and the signal characteristics of five communication systems, the system parameters and MATLAB simulation algorithm of multi-mode intermediate frequency are designed, and the algorithm simulation and verification are completed. Simulation results verify the effectiveness of the multi-mode if algorithm. Then, based on the software radio platform. The design of the multi-mode if system and the implementation of FPGA are carried out. The core module design of the multi-mode if is improved: the digital mixer is designed with the improved pipeline CORDIC circuit; In the design of high order FIR filter, the improved DA algorithm is used instead of the multiplicative and accumulative realization method. The design of CIC filter and HBF filter increases the function of serial dual channel and parameter configuration. The multi-mode RF configuration system is designed by combining ROM lookup table and state machine. The configuration interface of RF chip and the peripheral interface EMIF McBSP are introduced in detail. Finally, the software radio hardware test platform is built to test the receiving and transmitting paths of the multi-mode if system. The test results verify the multi-mode if. Multimode RF configuration and peripheral interface design and the correctness of FPGA implementation.
【學(xué)位授予單位】：重慶郵電大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TN92;TN791

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本文編號(hào)：1437498