一种高效的宽带数字信道化接收方法

宽带雷达对抗侦察数字接收机具有较宽的瞬时频率覆盖特性和较高的截获概率,并能处理同时到达的多个信号。多相滤波信道化接收机是实现宽带接收的一种方法,其抽取运算在滤波运算之前,运算量小,输出速率低,便于后续处理,是一种高效结构。给出了多相滤波信道化数字接收机的基本原理和实现方法,采用重叠一半多相滤波信道化数字接收机能够有效消除接收盲区,实现全概率接收并消除虚假输出,通过仿真试验证明了其有效性。     

基于FPGA的数字信道化接收机的研究及实现

本文讨论了软件化电子战侦察接收机多信号处理问题。使用多相滤波的宽带数字化接收设计技术，可以提高接收机的实时处理能力，提高全概率截获能力。本文讨论基于多相滤波的信道化接收机的基本原理及实现方案，给出了基于FPGA的数字信道化接收机的实现方法，实验结果证明了该方法是有效的。     

宽带数字信道化接收机的FPGA实现

为解决现代电子战对接收机处理带宽宽、灵敏度高及实时性处理的要求,提出一种数字信道化接收机的设计方法。在推导高效信道化接收机模型的基础上,采用多相滤波器结构实现的数字信道化接收机。该接收机利用超高速A/D对数据进行高速采样,然后由高性能FPGA进行数据抽取、多相滤波、CORDIC算法等信道化实时处理。为了提高实时性,采用并行IFFT实现。该信道化接收机不仅能稳定输出载频及相位信息,还能处理三路同时到达的不同信号。实际的性能测试结果表明该接收机的功能正确并达到预定指标。     

空间谱估计系统中信道化接收机的实现

在对基于多相滤波结构的宽带数字信道化接收机理论分析的基础上,结合九阵元空间谱估计系统的实际要求,对宽带信道化接收机的处理算法与实现进行了研究,深入分析其具体化的处理结构,将处理中的多路并行结构转化为串行处理.针对多相滤波处理中具体的数据流结构,推导出FPGA实现的优化实现结构.给出了前述优化结构的详细推导和具体实现,最后在EP2S60 FPGA芯片上实现了包括数字下变频和多相滤波信道化处理的接收机系统,验证了优化结构的可实现性和有效性.     

接收机

0620344基于FPGA的数字信道化接收机的研究及实现[刊,中]／马亮／／信息技术与信息化．-2006,(2)．-40-42 (D)本文讨论了软件化电子战侦察接收机多信号处理问题。使用多相滤波的宽带数字化接收设计技术,可以提高接收机的实时处理能力,提高全概率截获能力。本文讨论基于多相滤波的信道化接收机的基本原理及实现方案,给出了基于FPGA的数字信道化接收机的实现方法,实验结果证明了该方法是有效的。参6     

基于多相DFT结构数字信道化接收机的仿真研究

雷达侦察接收机已进入了数字时代,本文推导了一种多相滤波器实现方法,并建立一种基于多相DFT结构数字信道化接收机数学模型,使用MATLAB对其可行性进行仿真验证。这种结构结合了信道化接收机和数字接收机的特点,既能处理同时到达的信号,又具备较高数据处理速度,具有一定的研究价值。     

信道化接收处理方法研究

现代雷达接收机要求具有瞬时频带宽,良好的灵敏度和动态范围,检测同时到达信号的能力等特点。针对这些问题,采用多相滤波组信道化接收的处理方法,将两个线性调频脉冲信号通过多相滤波组信道化接收机,经信道划分、采样、移频等处理后,实现对多路信号的信道分离,并成功检测到同时到达的信号,降低了信号处理的复杂度,提高了接收机实时处理能力,尤其是提高了雷达接收机全概率截获目标的能力。     

一种高效灵活的信道化接收技术

实现了基于WOLA结构的高效灵活信道化接收机。用理论推导方法证明了该结构的正确性,同时说明了这种方法与基于DFT多相滤波结构信道化接收机的一致性。与基于DFT多相滤波结构相比,该方法高效灵活。仿真结果表明了该方法的正确性。为该方法的实际应用提供了参考。     

基于多相滤波的数字接收机的FPGA实现

给出了一种基于多相滤波的数字信道化接收机的实现方法,系统的处理带宽为875MHz,解决了高速ADC与FPGA处理速度之间的矛盾。为了克服信道化接收机的接收盲区,采用信道重叠的方法,连续覆盖瞬时带宽。在信道化处理后接测频模块,可以消除虚假信号的输出和提高测频精度。整个接收机在单片FPGA中实现,能够检测同时到达的两个信号,并实时输出脉冲描述字（PDW）,经FPGA时序仿真结果验证了算法模型的正确性和有效性。     

全概率截获信道化接收机的设计

文章重点研究了基于多相滤波技术实现全概率截获的信道化接收机,推导了实信号的多相滤波器组信道化接收机数学模型,并基于模型利用MATLAB针对四路信号进行了仿真分析,仿真结果证明了接收机模型的正确性和可操作性,为通信系统具体应用该接收机提供了重要的理论依据.     

Advanced channelization for RF, microwave, and millimeterwaveapplications

An overview of the channelization function, the parallel signal processing techniques used in channelizers, the signal processing functions, and the critical channelizer parameters is given. Signal processing capabilities that use analog techniques suitable for channelized receivers are compared with those capabilities that can be obtained by using current or foreseen digital techniques. The receiver signal-processing needs are outlined, and the limitations of digital signal processing in terms of the overall receiver signal processing needs are discussed. Options and tradeoffs at the receiver and channelizer technology levels are discussed. Promising channelizer technologies, including components, that have been or potentially may be implemented with small volumes and moderate dynamic range are described. Parallel signal-processing methods, architectural techniques, and hardware for channelized receiver technologies that can be implemented in a small volume (tens of channels per in³) with a moderately high dynamic range (>50 dB) are discussed. These include the surface-acoustic-wave (SAW), bulk-acoustic-wave (BAW), magnetostatic-wave (MSW), and acoustooptical (AO) channelizer technologies. The critical signal preprocessing functions required in channelized receivers before the needed information is passed on to the host computer, so that the host computer can be operated at a possible computation rate, are discussed, and the first successful monolithic integrated circuit preprocessor component for channelizers, is presented     

宽带数字信道化接收机综述

 宽带数字信道化接收机以其高性能在电子战和无线电通信中有着重要的运用.本文基于复杂电磁环境下电子战的运用需求,分析了信道化接收机系统的发展现状和趋势;研究了目前的数字信道化接收机技术的主要系统结构及其发展趋势;重点分析了信道化接收机技术的发展历程和发展趋势.根据目前的信道化接收机系统和数字信道化接收机技术的现状可以看出,数字信道化接收机发展的一个趋势是:宽带数字化(大量子信道)和非均匀信道化接收机及动态信道化接收机.     

基于多相滤波的宽带接收机信道化算法研究

对基于多相滤波技术的信道化算法做了仿真和优缺点分析。针对其存在盲区的问题，以降低抽取率为基础，对该算法进行了改进，建立了无盲区信道化接收机模型。并由此模型设计了四信道仿真系统，实验结果验证了模型的正确性。最后，在Tiger SHARCTS101上实现了改进算法．运行结果证明了算法的高效性。     

基于多相滤波法的中频信号正交解调的CPLD实现

正交相干检波可以将复包络的所有信息进行保留,所以在数字信号处理中得到广泛应用。该文讨论了数字信号正交相干检波的多相滤波实现方法,并且给出了基于 CPLD 的 IC 实现。计算机仿真结果表明,多相滤波方法可以提高信噪比,实现高性能数字信号处理的要求。     

数字信道化接收机信号处理技术

数字信道化接收机是一种比较优秀的电子战接收机。采用瞬时测频技术可以有效地消除相邻信道的虚假输出；利用非相干积累技术可以克服固定门限检测的缺点；跨信道信号的检测及恢复技术可以解决宽带信号的跨信道问题。仿真实验证明了以上方法的有效性，这些技术的采用可使数字信道化接收机早日实现实用化。     

Monobit digital receivers for ultrawideband communications

Ultrawideband systems employ short low-power pulses. Analog receiver designs can accommodate the required bandwidths, but they come at a cost of reduced flexibility. Digital approaches, on the other hand, provide flexibility in receiver signal processing but are limited by analog-to-digital converter (ADC) resolution and power consumption. In this paper, we consider reduced complexity digital receivers, in which the ADC is limited to a single bit per sample. We study three one-bit ADC schemes: 1) fixed reference; 2) stochastic reference; and 3) sigma-delta modulation (SDM). These are compared for two types of receivers based on: 1) matched filtering; and 2) transmitted reference. Bit-error rate (BER) expressions are developed for these systems and compared to full-resolution implementations with negligible quantization error. The analysis includes the impact of quantization noise, filtering, and oversampling. In particular, for an additive white Gaussian noise channel, we show that the SDM scheme with oversampling can achieve the BER performance of a full-resolution digital receiver.     

VLSI for analog/digital communications

Present trends and future prospects are discussed, emphasizing the prospects for fuller VLSI integration of low-power digital radio, for applications such as in-building wireless radio receivers. The main concern is with the front end of the receiver, including continuous-time analog and sampled analog VLSI filtering, and technologies that can mix analog and digital on the same chip. Prospects for the use of bipolar complementary metal-oxide semiconductor (BiCMOS) technology in communications are examined. Continuous-time monolithic filtering is discussed. As an example of a central receiver/transmitter component that one would like to integrate monolithically, the frequency synthesizer is considered     

Digital microwave receiver technology

This paper reports the impact of digital signal processing on microwave receiver technology. The majority of modern receiver designs are based on digital technology. Wide-and narrow-band receivers are presented. The wide-band receivers cover approximately 1-GHz instantaneous bandwidth and are used to intercept radar pulses. Current narrow-band receivers cover up to 50-MHz instantaneous bandwidth and are primarily used for receiving communication signals. Two approaches for wide-band receiver design are discussed. One is the conventional digital receiver. The other one is called the monobit receiver, which has slightly inferior performance in some respects, but can be built on a single chip. Narrow-band receivers are best implemented in software because they can more adapt to changes. Two types of receivers are discussed. One is the software Global Positioning System receiver. The other one is called a transform-domain communication system. The object of this system is to avoid interference in a hostile communication environment