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IPQAM system hardware design and implementation

Author: HuangMing
Tutor: WangHongYuan
School: Huazhong University of Science and Technology
Course: Communication and Information System
Keywords: IPQAM QAM modulation Gigabit Switch Clock Synthesizer
CLC: TN949.292
Type: Master's thesis
Year: 2011
Downloads: 38
Quote: 0
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Abstract


With cable television transition from analog to digital , the state vigorously promote the triple play , radio and television operators faced unprecedented challenges , to build an IPTV broadcasting is their only way. The proposed solution is an IP-QAM broadcasting IPTV solution. The main contents of this paper is to study the IP-QAM hardware design and implementation. Firstly, according to the function of the IP-QAM system is divided into the following hardware modules , Gigabit Ethernet switch modules , Gigabit PHY module , stream buffer multiplexing module , QAM modulation module , a variable gain amplifier module on inverter module , network management system module. This paper analyzes the design process of these modules , debugging methods, and test results, and for the clock synthesizer and upconverter module parameters are given a detailed calculation process , convection cache multiplexing module and the network management system module only briefly introduction , switches , Gigabit PHY and QAM modulation is the article focuses on the content . In the article, Gigabit PHY given network packet capture analysis process ; gives a 55MHz clock synthesizer with 880MHz clock output ; QAM modulation module gives a detailed design process , and gives the single- frequency sine wave , single carrier and four carrier results. Subsequently, in the broadcasting spectrum analyzer test equipment such as the IF output signal QAM modulation and RF output signal of the performance indicators , and for key indicators, such as modulation error degrees , SNR , and so do a detailed introduction. In the last article , combined with the IP-QAM market for IP-QAM research presented next prospect .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > TV > Television: function, use sub- > PC TV
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