基于ITS的智能车辆定位导航系统可划分为三个层次：自主导航系统、单向通信系统和双向通信系统。
Based ITS Intelligent Vehicle location and navigation system could be divided into three levels: autonomous navigation systems, communications systems and two-way one-way communication system.
针对传统无线通信是单向传输的局限问题，设计了基于nRF 905射频芯片的双向通信系统并以单片机为主控制单元。
Based on the traditional wireless communications limited transmissions is limited, based on the NRF905 rf chip design of two-way communication system and MCU control unit mainly.
摘要：本系统将蓝牙无线通信技术应用于有线数字电视系统，在单向机顶盒的数字电视系统上实现各种增值业务。
Abstract: This system applies wireless blue-tooth technology to digital television system, and realizes the different value-added services in one direction system.
摘要：本系统将蓝牙无线通信技术应用于有线数字电视系统，在单向机顶盒的数字电视系统上实现各种增值业务。
Abstract: This system applies wireless blue-tooth technology to digital television system, and realizes the different value-added services in one direction system.
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