This paper describes the basic theory of speech compression encoding and decoding algorithm in TETRA ( terrestrial trunked radio ) system .

研究 了陆地集群无线通信（ TETRA）数字集群移动通信系统的语音压缩编解码算法的基本原理。

This paper introduced the channel coding schemes used in TETRA analyzed the performance of principle channel coding techniques and then gave the channel coder implementation scheme .

文章 通过介绍 TETRA 标准中所采用的信道 纠错编码方案对 几种纠错编码技术及其性能进行了 较为详细的分析，在此基础上给出了信道编码器的实现方案。

This paper gives the designing and development of the dispatcher system embedded GIS over the TETRA digital trunked radio network . In addition according to the users ' requirements the function of patching groups and the Recording System are also developed .

论文基于北京TETRA数字集群无线政务网，开发了嵌入GIS的 TETRA数字集群调度系统，并根据用户需求开发了通话组派接功能和录音系统。

The paper discusses the scheme of design and implementation of TETRA dispatcher encryption system .

文章 详细论述了 TETRA 端到 端加密系统的 关键 部分 &TETRA调度台加密系统的设计与实现。

This paper presents a dispatching station project based on TETRA over IP . The station is a multimedia PC and access to TETRA network via LAN or WAN . The dispatcher dispatches people in his organization with the software running on the station .

本文提出基于IP技术的TETRA系统调度台构建方案，调度台为一台多媒体PC机，通过LAN/WAN接入 TETRA网络，调度员通过运行其上的软件完成对本部门人员的调度与管理。

This paper undertakes a research on control center and dispatching station and presents a practical software design solution against the background of the development of digital trunking experimental system .

本 论文 以数字集群试验系统的开发为背景，对 TETRA系统控制中心和调度台 进行研究，提出一种切实可行的调度台软件设计方案。

Based on the signaling mechanism and working mode of the two systems this paper introduces the design scheme of the gateway architecture the mappings of signaling and the procedure of signaling interconnection between SIP and TETRA .

基于这两个系统的信令机制及其工作方式， 论文给出了网关的体系结构、信令的映射关系以及SIP与 TETRA信令互通的流程的设计方案。

The UV-Vis absorption spectra fluorescence spectra and excited singlet lifetimes transient absorption spectra and excited triplet lifetimes of novel tetra - α(β) - ( 4-pyridyloxy ) zinc phthalocyanines were measured in this paper .

测定 了新合成的α位取代和β位取代的 四-（ 4-吡啶氧基）酞菁锌配合物的UV-Vis吸收光谱、荧光光谱及激发单重态寿命、纳秒瞬态吸收光谱与激发三重态寿命。