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为了客观评价和鉴定各种通信设备,需要营造逼真的宽频带、高密度、多样式的电磁信号环境。基于数据抽取和插值理论,提出了一种并行直接数字合成(DDS)技术。基于并行DDS技术,研究了宽带通信信号模拟方法,可以用来在宽频带范围内模拟复杂的通信信号环境。利用高性能复杂可编程门阵列(FPGA)和高速数模转换器(DAC)实现了16路并行DDS,可直接在射频频段产生各种样式的通信信号。
In order to objectively evaluate and identify various communication devices, it is necessary to create a realistic wideband, high-density and multi-format electromagnetic signal environment. Based on data extraction and interpolation theory, a parallel direct digital synthesis (DDS) technique is proposed. Based on the parallel DDS technology, the simulation method of broadband communication signal is studied, which can be used to simulate complex communication signal environment in a wide frequency range. Achieve 16-way parallel DDS with high-performance complex programmable gate arrays (FPGAs) and high-speed digital-to-analog converters (DACs) that generate various types of communication signals directly in the radio frequency band.