【作者】 孙德芳；

【导师】 彭玉华； 钱保歧；

【作者基本信息】 山东大学 ， 电子与通信工程， 2007， 硕士

【摘要】 本论文介绍了几种编码和调制技术的基本原理和课题的总体实现结构,重点分析和讨论了滚降系数可调的成形滤波、内插技术以及滤波器中乘法器、加法器的实现方法。通过外部控制器可对FPGA内部设计的多项参数进行设置,可支持32.000kbps～4.096Mbps范围内的多速率数据传输,适用于各种信道限带性能要求的传输系统。本论文使用一片FPGA芯片实现了信道编码(包括数据加扰、差分编码、卷积码、RS码、交织等)、多种调制方式(BPSK、QPSK、π/4-QPSK、TC8PSK、16QAM)、成形滤波器、多级内插、上变频器、具有连续/突发信号模式的数据源。将本论文的成果移植到某单位的信号源研制平台,基本上可以满足现阶段研制和维修解调设备对信号源的需求,因此具有较高的使用价值。更多还原

【Abstract】 This paper introduces the basic principle of several codes and modulation techniques and the overall implementation structure under the topic, focuses on the analysis and discussion of pulse shaping filter and interpolation technology with roll off factor able to be adjusted and the implementation methods of multiplier and adder in filters. The variable multi-parameters inside FPGA can be set by an external controller, to support the multi-speed data transmission within the scope from 32.000 kbps to 4.096 Mbps and apply to transmission systems with different band-limited performances of signal channels. The project in this paper realizes with a FPGA chip channel coding (including data scramble, difference code, convolutional code, RS code and interleaving), multiple modulations (BPSK, QPSK,π/4-QPSK, TC8PSK, 16QAM), pulse shaping filter, multi-level interpolation, upconverter and data source with continuous/burst signal. The research results of this paper, if used in the signal source research platform of some institute, can basically meet the demand imposed by research and maintenance of demodulation equipment on signal source. That shows the value of this paper.更多还原