A rapid-acquisition architecture for advanced avionics and spread-spectrum applications

9th IEEE/AIAA/NASA Conference on Digital Avionics Systems Pub Date : 1990-10-15 DOI:10.1109/DASC.1990.111265

M. Jordan, J. Luecke

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引用次数: 2

Abstract

A rapid-acquisition architecture for frequency hopping (FH), direct sequence (DS), and various forms of hybrid spread-spectrum waveforms is presented. This concept offers extraordinary improvements in flexibility and adaptability, as well as significant advantages in size, weight, and power reduction over those of conventional systems. The general concept is based on matching application-specific integrated circuit (ASIC) variable-length digital matched filter technology to programmable digital frequency synthesizers for an adaptable -FH/DS spread-spectrum system. Within a given time interval a specific set of outputs from each code-matched filter (CMF) appears which represents the correlation of the received signal against a certain code offset. This is the key function for fast and reliable acquisition of the spread-spectrum signals. The basic configuration consists of the fast-acquisition subsystem, which receives the signals and downconverts, or dehops, by a frequency-hopping local oscillator driven by the known pseudonoise frequency hop pattern. This architecture configuration offers ease of technology insertion as new developments in technology may emerge. The modular philosophy allows for future expansion of the initial architecture in a cost-effective manner.<>

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用于先进航空电子设备和扩频应用的快速采集架构

提出了一种用于跳频(FH)、直接序列(DS)和各种形式的混合扩频波形的快速采集结构。与传统系统相比，该概念在灵活性和适应性方面提供了非凡的改进，并且在尺寸、重量和功耗方面具有显着优势。总体概念是将专用集成电路(ASIC)变长数字匹配滤波器技术与可编程数字频率合成器相匹配，用于自适应-FH/DS扩频系统。在给定的时间间隔内，出现来自每个代码匹配滤波器(CMF)的一组特定输出，这些输出表示接收信号与特定代码偏移的相关性。这是实现扩频信号快速、可靠采集的关键功能。基本配置由快速采集子系统组成，该子系统接收信号并由已知伪噪声跳频模式驱动的跳频本地振荡器进行下变频或脱跳。随着新技术的出现，这种体系结构配置提供了技术插入的便利性。模块化理念允许以经济有效的方式对初始架构进行未来扩展。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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9th IEEE/AIAA/NASA Conference on Digital Avionics Systems

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