本文關(guān)鍵詞： PCM/FM 發(fā)射機(jī) S頻段 FPGA　出處：《北方工業(yè)大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著航天無線通信技術(shù)的不斷向前發(fā)展,各種先進(jìn)無線通信技術(shù)層出不窮,原先的功能簡單、互通性差、通用性差的發(fā)射機(jī),越來越不能滿足市場對性能更好的產(chǎn)品的需求,本論文提出的S頻段數(shù)字調(diào)頻發(fā)射機(jī)可以廣泛應(yīng)用于航天無線通信領(lǐng)域,它采用PCM/FM數(shù)字化調(diào)制技術(shù),可以很好地利用計(jì)算機(jī)進(jìn)行編程,然后在FPGA上實(shí)現(xiàn),有效地解決了當(dāng)前航天發(fā)射機(jī)存在的這些問題。基于FPGA實(shí)現(xiàn)的S頻段數(shù)字調(diào)頻發(fā)射機(jī),系統(tǒng)共有四個部分組成,分別是：上位機(jī)界面、穩(wěn)壓電源模塊、數(shù)字中頻模塊和射頻模塊。信號在FPGA內(nèi)部實(shí)現(xiàn)PCM數(shù)字信號的全數(shù)字化調(diào)制,再經(jīng)DAC器件完成數(shù)字信號到模擬信號的轉(zhuǎn)換,最后在射頻端經(jīng)過兩級上變頻完成S頻段射頻信號的輸出。該發(fā)射機(jī)的輸入信號碼速率和輸出射頻信號頻點(diǎn),均可以通過上位機(jī)界面靈活的設(shè)置,且設(shè)置完成后可以實(shí)時存儲,掉電不丟失。本論文采用的PCM/FM調(diào)制技術(shù),具有精度高、動態(tài)范圍大和抗干擾等優(yōu)點(diǎn),在設(shè)計(jì)該航天發(fā)射機(jī)的過程中,充分考慮了發(fā)射機(jī)的可靠性、穩(wěn)定性、散熱性以及電磁兼容性,最后經(jīng)過實(shí)際測試發(fā)現(xiàn),所研制出的發(fā)射機(jī)的輸入輸出各項(xiàng)參數(shù)滿足設(shè)計(jì)要求,并且硬件電路簡單,使用方便,能夠?qū)崿F(xiàn)數(shù)據(jù)的高速傳輸,具有很強(qiáng)的通用性和良好的互通性。
[Abstract]:With the continuous development of space wireless communication technology, a variety of advanced wireless communication technologies emerge in endlessly, the original functions are simple, poor interoperability, poor versatility of transmitters. The S-band digital frequency modulation transmitter proposed in this paper can be widely used in the field of aerospace wireless communication. It adopts PCM/FM digital modulation technology. It can be programmed by computer and implemented on FPGA, which effectively solves the problems existing in the current space transmitter. The S-band digital frequency modulation transmitter based on FPGA is realized. The system is composed of four parts: upper computer interface, voltage stabilized power module, digital if module and RF module. The signal realizes the full digital modulation of PCM digital signal in FPGA. Then the conversion of digital signal to analog signal is completed by DAC device. Finally, the output of S-band radio frequency signal is completed by two stages up-conversion at the RF end. The input signal rate and the frequency point of the output radio frequency signal of the transmitter are obtained. Can be set flexibly through the upper computer interface, and after the setup can be stored in real time, no power loss. This paper uses the PCM/FM modulation technology, with high accuracy. In the process of designing the space transmitter, the reliability, stability, heat dissipation and electromagnetic compatibility of the transmitter are fully considered. The input and output parameters of the developed transmitter meet the design requirements, and the hardware circuit is simple, easy to use, and can achieve high-speed data transmission, with strong versatility and good interoperability.
【學(xué)位授予單位】：北方工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TN832.1

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