集群电台接口板的设计与实现

发布时间：2018-01-04 15:13

  本文关键词：集群电台接口板的设计与实现　出处：《电子科技大学》2012年硕士论文　论文类型：学位论文

  更多相关文章： 集群 一键对讲 公共电话网 语音激活检测 双音多频

【摘要】：集群通信系统是一种专网专用的系统。它具有应急指挥通信和综合调度的功能（如组播、一键对讲以及紧急呼叫等功能）。集群通信系统已经在物流、机场、林业等专网专用的行业和公安、消防、铁路等应急指挥调度领域得到了非常广泛的应用。随着集群专网的日益增多，，对专网之间互联互通的需求也日益增加，由于不同的部门如公安，消防等使用的集群专网体制不同，多网融合、统一调度的问题也日益突出。 本论文通过分析不同集群专网的接口特点，提出了基于音频接口的统一的互联解决方案，设计开发了综合交换调度设备。本论文主要论述了综合交换调度设备中集群电台接口板的设计与开发。每块集群电台接口板提供了四路集群电台接口，可以实现四个不同频段、不同技术体制的集群网际之间的互联，也可以连接电台实现集群台和电台之间的互联。通过与综合交换调度设备中二线板的数据交互还可以使无线集群专网接入到公共电话网(PSTN)和GSM/CDMA移动网络，可进行单双工设备之间的顺畅通信，解决了多部门之间无法统一指挥调度等问题。 集群电台接口板由于受外形尺寸、成本控制等原因，在设计中使用了基于SOPC的硬件架构。采用ALTERA的FPGA并在内部构建了基于NIOSⅡ的处理器平台，除了语音编解码用专用芯片实现外，其余的数据处理和控制均在FPGA中完成。 本文的主要工作如下： 1.设计了集群电台接口板的硬件系统，包括语音接口电路、语音编解码电路、FPGA子系统和热拔插接口电路等几个部分，最终设计完成了单元板的原理图和PCB。 2.完成了FPGA逻辑设计和软件程序的开发。对于设计集群电台接口板中遇到的语音激活检测（VAD）和双音多频（DTMF）检测两个关键算法，首先使用Matlab对算法进行了仿真，然后把算法用VHDL硬件描述语言实现，并用ModelSim软件进行了前仿真，通过修改调整时序，确保逻辑程序设计的正确性。最后对逻辑程序进行了综合、适配并下载到FPGA上通过使用SignalTapⅡ逻辑分析工具进行了验证。程序算法全部用FPGA内部基本逻辑单元实现，摆脱了对FPGA内部的乘法器等特殊逻辑资源的依赖，使这两个算法的IP核通用于所有FPGA平台，方便了在其它产品的使用。 3.通过硬件和软件的综合调试与验证，最终形成了产品，目前设备已经装备武警、人防等部门，得到了用户的一致好评。双音多频检测等IP核也移植到公司的XX对讲控制器等设备上使用，其实用性也得到了进一步的验证。
[Abstract]:Trunking communication system is a special network system. It has the functions of emergency command communication and integrated dispatch (such as multicast, one-click intercom and emergency call). The trunking communication system is already in the logistics and airport. The field of emergency command and dispatch, such as forestry and other special networks, has been widely used. With the increasing number of special cluster networks, the demand for interconnection between private networks is increasing day by day. As different departments, such as public security, fire protection and other use of the cluster network system is different, the integration of multiple networks, unified scheduling problems have become increasingly prominent. By analyzing the interface characteristics of different cluster networks, this paper proposes a unified interconnection solution based on audio interface. This paper mainly discusses the design and development of the trunking radio interface board in the integrated switching dispatching equipment. Each cluster radio interface board provides four trunking radio interfaces. It can realize the interconnection between the four different frequency bands and different technical systems. The wireless trunked private network can also be connected to the public telephone network (PSTN) by means of data interaction with the two-wire board in the integrated switching and dispatching equipment. And GSM/CDMA mobile networks. It can communicate smoothly between single duplex devices and solve the problem that multi-department can not be unified in command and scheduling. The interface board of trunked radio station is controlled by size and cost. The hardware architecture based on SOPC is used in the design, and the processor platform based on NIOS 鈪

本文编号：1378908