【摘要】 结合第二代移动通信系统GSM蜂窝网及陆地集群无线通信集群网提出了一种实用的数字集群移动通信方案 .即采用TETRA系统的信源编解码和信道编解码技术 ,调制解调采用GSM蜂窝移动通信系统的GMSK技术 ,对国内成熟的模拟集群系统稍加改进 ,如将基带话音处理及载波调制数字化 ,就成为国内企业可批量生产的数字集群系统 .并用硬件及软件对此方案进行了仿真 ,分析结果表明这是一种易于实现 ,性能良好的数字集群移动通信系统方案更多还原

【Abstract】 Combined with the TETRA digital trunking system and GSM mobile communication system, a digital scheme was presented. The scheme was composed of the speeding compression encoding algorithm, channel encoding and decoding algorithm in TETRA system and GMSK modulation and demodulation in GSM system. The analogy trunking system could be improved by implementing the digital audio, modulation and demodulation. The scheme was simulated by soft and hard methods. The simulation results showed that the scheme could easily work and had excellent performance.更多还原