一种基干DSP技术的误码产生仪设计与实现

发布时间：2018-01-18 14:06

本文关键词：一种基干DSP技术的误码产生仪设计与实现　出处：《电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：通信设备设计中一个非常重要的指标是抗误码性能。在通信设备研制完成后的性能测试中,需加入各种不同的误码类型来验证通信设备的通信可靠性,以确认其设计是否达到相应功能指标。误码的种类分为随机误码、突发误码、信道瞬断等不同类型,且不同的通信设备需要适应的误码量级范围及误码种类各不相同,为了适应各类通信设备抗误码性能测试需求,引入了基于DSP技术的误码产生仪,能够灵活的通过上层软件配置,达到适应各类通信设备的抗误码性能的测试需求。本论文正是针对上述要求,结合通信设备性能测试中心系统设计,为通信设备性能测试系统设计一款误码产生仪,模拟通信系统中的信道误码。该误码产生仪作为通信设备性能测试系统中的一个子设备,能够为基于GMSK调制方式的超短波通信设备模拟恰当的信道环境,为超短波通信设备性能测试提供恰当的测试环境。同时,该误码产生仪也提供了通用的同步数据接口,为具有数字接口的各类通信设备提供数据接口,模拟信道产生各种类型误码,便于各类数字通信设备的性能测试。在设计上,采用基于DSP软件编程技术产生任意量级的随机误码,误码量级及误码种类可通过上层软件进行设置,结合各型通信设备的接口指标,可在上层软件中设置不同接口属性,如收发电平、接口阻抗匹配、平衡、非平衡接口工作方式等。该误码产生仪还能够产生任意位数的突发误码,突发的时刻是随机的,且对整个突发误码产生过程来说,误码量级是可以任意设置的。此方法能够更真实模拟实际信道产生突发误码情况,为通信产品的抗误码性能测试构造适当的误码测试环境。基于DSP技术的误码产生仪能够随机模拟信道的误码和延迟等特性,即能够模拟随机误码、突发误码、信道瞬断和信道时延。本文主要重点介绍了随机误码、突发误码、信道瞬断、信道时延在模拟过程中的误码产生、误码插入、模拟仿真、测试验证等方面的具体实现方法及实现流程。在软硬件设计方面,采用模块化设计思想,充分考虑系统的可移植性,可应用于其它类似工程设计中。
[Abstract]:A very important index in the design of communication equipment is the error resistance performance. In the performance test after the development of communication equipment, it is necessary to add various types of error codes to verify the communication reliability of the communication equipment. The types of error codes can be classified into random error code, burst error code, channel instantaneous break and so on. And different communication equipments need to adapt to different error order of magnitude and kinds of error. In order to meet the requirements of error resistance testing of all kinds of communication equipment, an error generator based on DSP technology is introduced. Can be flexible through the upper software configuration to meet the requirements of all kinds of communication equipment error performance test. This paper is to meet the above requirements, combined with the communication equipment performance test center system design. An error generator is designed for the communication equipment performance test system, which simulates the channel error code in the communication system. The error generator is used as a sub-device in the communication equipment performance test system. It can simulate the appropriate channel environment for ultrashort wave communication equipment based on GMSK modulation, and provide appropriate test environment for the performance test of ultrashort wave communication equipment. The error generator also provides a universal synchronous data interface, provides a data interface for various communication devices with a digital interface, and simulates the generation of various types of error codes in the channel. It is convenient to test the performance of all kinds of digital communication equipment. In the design, random error codes of any order are generated by using DSP software programming technology, and the order of error and the types of error codes can be set through the upper software. In combination with the interface index of various communication devices, different interface properties can be set in the upper software, such as transceiver level, interface impedance matching, balance. The BER generator can also generate any bit burst error code, the burst time is random, and for the whole burst error generation process. The order of error can be set at any time. This method can simulate the actual channel to generate the burst error rate more realistically. The error generator based on DSP technology can simulate the characteristics of the channel such as error code and delay randomly, that is, it can simulate the random error code. This paper mainly introduces the random error code, burst error code, channel instantaneous break, channel delay in the simulation process, error code insertion, simulation. In the aspect of hardware and software design, the modular design idea is adopted, and the portability of the system is fully considered, which can be applied to other similar engineering design.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN915.05

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