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摘要：随着数字信号处理理论和微电子技术的发展，数字信道化接收机也有了进一步的发展。将宽带 及 尽可能靠近天线，并在一个模块化、开放性的通用硬件平台上尽可能多的用软件来实现无线电台的各种功能，是软件无线电的基本思想。信道化数字接收机是一种基于软件无线电思想的，在军事领域和通信领域都有着广泛应用的电子设备，具很多优点如：数字化、软件化、大带宽、全概率接收、大动态范围、多信号同时处理等。本论文一开始先简单介绍了软件无线电，以及如何在数字信道化接收机中将其应用。然后介绍了采样技术、数字下变频和多速率信号处理等有关数字接收机的基本理论。并在此基础上对基于多相 滤波器组的数字信道化高效结构进行了研究，最后结合了可以降速的滤波算法,研究了数字信道化接收机的数学模型，并通过推导建立了多种实信号信道化数字接收机的数学模型。本论文还从运算复杂度和结构有效性对各种模型进行分析比较，并通过16信道并行处理接收机的 仿真论证了方案的正确性。4790
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关键词：软件无线电；信道化数字接收机；多速率信号处理；多相 滤波器组。
The realization of mathematical model of channelized receivers based on real signal polyphase filter bank
Abstract：Along with the development of digital signal processing theory and microelectronics, the digital channelized receiver had a further progress. The basis idea of software radio(SRD) is to place the A/D and D/A close up the antenna as possible as and use software to realize all the function of any radio based on an opening and blocking currency hardware platform. The channelized digital receiver based on SRD is the electronic equipment, which can be used in communication and military affairs, because of it's excellence on wide band frequency coverage, digital processing, software programming, high dynamic range, receiving signal with all probability, simultaneous signal detection and so on. First of all, this paper simply introduces software radio in the three stages of development, and then correspond them to the three stages of digital receivers. And then the basic theory of digital receiver, such as the technique of sample, multi-rate signal processing, digital down converter, is introduced. Based on upper study deeply the efficient digital channelized architectures based DFT polyphase filter banks to deduce, and this paper combines the reducing speed filtering algorithm. The digital channelized receiver is studied in it, and establish several kinds channelized digital receiver mathematic models for real signal. Not only we analyze these architectures efficiency and computing complexity, but also complete the 16-band parallel processing receiver’s computer simulation to testify the architectures are correct.
Keywords:software radio; digital channelized receiver; multi-rate digital signal processing; DFT polyphase filter.
目录
1 绪论 1
1.1 研究的背景及意义 1
1.2 信道化接收机结构简介 2
1.2.1 数字信道化接收机：基带 2
1.2.2 数字信道化接收机：中频 3
1.2.3 数字信道化接收机：射频 4
1.3 信道化处理的目的及意义 4
1.4 本文主要内容及章节安排 5
2 基于多相滤波器组信道化的基本理论 6
2.1 理想采样与采样定理 6
2.1.1 理想采样和采样定理 6
2.1.2 带通采样定理 7
2.2 多速信号处理基础 9
2.2.1 内插 9
2.2.2 抽取 10
2.2.3 内插和抽取对DFT和FFT的影响 11
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