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本文分析和综合了前人在短波信道方面的一些研究成果,得出了短波信道特性的较详细的统计规律,确定了一种能较全面地反映短波信道特性的数学模型,根据此模型和信道的统计规律,设计和制作了短波信道模拟器,此模拟器采用TMS32010数字信号处理片和 Z—80单板机作为主要器件。TMS32010系统完成数字信号的处理和运算,产生多普勒频移、多径时延和衰落;而 Z—80系统主要用作系统的控制和数据交换,整个设备不仅成本低,而且灵活可靠,通过人为改变某个参数,可模拟出各种信道来,并且信道参数和曲线可通过 RS—232接口在 PC 机上显示出来,因此,模拟器是一部很好的模拟测试器材,对于科研和教学十分有用。
In this paper, we analyze and synthesize some previous research results of shortwave channels, obtain more detailed statistical rules of shortwave channel characteristics, and determine a mathematical model that can more fully reflect the characteristics of shortwave channels. Based on this model and channel The design and manufacture of short-wave channel simulator, the simulator uses TMS32010 digital signal processing chip and Z-80 single-board machine as the main device. TMS32010 system to complete the digital signal processing and computing, resulting in Doppler shift, multipath delay and fading; and Z-80 system is mainly used for system control and data exchange, the entire device not only low cost, but also flexible and reliable, through Artificially change a parameter, can simulate a variety of channels to, and channel parameters and curves can be displayed on the PC through the RS-232 interface, so the simulator is a good simulation test equipment, for scientific research and teaching is very it works.