基于分集接收的短波数字多通道信道化接收机的设计与实现

发布时间：2018-01-13 13:21

本文关键词：基于分集接收的短波数字多通道信道化接收机的设计与实现　出处：《南京理工大学》2017年硕士论文　论文类型：学位论文

更多相关文章：短波 信道化接收机 WOLA结构 FPGA

【摘要】：短波通信因其收发结构简单、传播距离远而在军事、应急救灾中占据着举足轻重的地位,传统的窄带模拟接收机因接收信号形式单一、带宽窄已难以适应越来越复杂多变的电磁环境。短波数字信道化接收机由于具有精度高、频率范围广、结构灵活、性价比高等优点,而得到越来越广泛的重视。本文研究的是基于分集接收的短波多通道信道化接收机系统。该系统可接收10240路9.6KHz采样率,3KHz带宽的子信道,实现1.49-30.01MHz全频段全概率接收。论文首先介绍了短波接收机的研究背景、多抽样率数字信号处理相关理论,论述并推导了数字信道化接收机的几种结构;其次,根据总体需求,设计了系统总体方案;然后完成了信道化算法的FPGA设计及仿真,主要包括:AD采样模块、数字下变频模块、滤波抽取模块、WOLA信道化模块、上变频、数字自动增益控制模块以及数据高速通信接口。最后,在搭建的硬件平台上完成算法模块、高速通信接口的调试以及系统总体性能指标的测试。实验结果表明,接收机灵敏度、动态范围、带宽等关键指标均符合设计要求,具有一定的应用价值。
[Abstract]:Short wave communication transceiver because of its simple structure, long transmission distance and in the military, emergency relief plays an important role, the traditional narrowband analog receiver for receiving the signal form of a single, narrow bandwidth has been difficult to adapt to the increasingly complex electromagnetic environment changing. HF digital channel receiver with high precision, wide frequency range, structure flexible, cost advantages, and get more and more attention. This study is based on short wave diversity receiving multi-channel channelized receiver system. The system can receive a 10240 9.6KHz sampling rate, channel bandwidth of 3KHz, realize 1.49-30.01MHz band full probability receiving. This paper introduces the research background of shortwave receiver. Multirate digital signal processing theory, and discussed several structures of the digital channelized receiver is derived; secondly, according to the overall design of the system demand. The overall program; and then complete the design and Simulation of FPGA channel algorithm includes AD sampling module, digital filter module, WOLA extraction module, channel module, frequency conversion, digital automatic gain control module and a high-speed data communication interface. Finally, complete the algorithm module of the hardware platform, high-speed communication the debugging interface and overall system performance test. The experimental results show that the receiver sensitivity, dynamic range, bandwidth and other key indicators are in line with the design requirements, and has certain application value.

【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN851;TN925

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