The Research Of 350M Trunking Communication System Data Transmission Performance

As the public security departments of the trunking communication system requirements increase, simply call scheduling feature can no longer meet the needs of the public security departments to simulate the cluster must be developed into a wireless data transmission capability of the communication system, using it to send some documents, pictures, etc. data. This requires the trunking communication system must have data transfer capability.350M analog trunking communication system based on the data transmission system has been under the operational, it is by simulating the cluster voice channels for data transmission, but their performance is not as reliable data transmission speed and reliability is not high, so voice channels bandwidth is very limited circumstances, to improve data transmission performance and reliability of cluster communication feature rich communications system will play an important role. In this paper, the cluster transmission of radio channel communication system to conduct in-depth study, through the wireless channel experiences multipath transmission and receive radio channel path loss simulation of the signal attenuation characteristics. In order to achieve efficient data transmission, several studied in this paper is suitable for analog trunking voice channel modulation mode, on their characteristics and performance analysis, and came to use them for transmission bit error rate performance simulation, but also with the under the fading characteristics of wireless channel combining performance simulation, the adaptive control system is designed to provide data base, in the end system, the introduction of adaptive technology, power and modulation to achieve a joint adaptive control. Data transmission system for the overall design.