The Research Of TDMA-OFDM Technology Application In High-speed Data Transmission

TDMA technology and OFDM technology are two popular technologies in today’s communications field. The former is widely used in the mobile communication system of the public network. In the situation of the precious frequency resources, TDMA technology is one of the most popular multiplexing and has high research application value also. The latter which has a high degree of application prospects is the domestic LTE framework technology and is the key technology of communication within the future period of time.For the demand of high-speed data transfer between the aerial cluster users of manned space landing field and ground search and rescue mission, and for the purpose of efficient and reliable transmission of communication system under the conditions of high-speed mobile, multi-path, low latency, harsh electromagnetic environment and broadband in task environment and task organization mode, this article seeks suitable communications solutions.Articles study the communication systems of high-speed data transmission between the domestic and international air users, especially the development and status of the data chain. At the same time, articles analysis the various systems and technological regime which is referential significance.In the ensuing detailed engineering design of high-speed data radio system, the article describes the system frame structure, system bandwidth, antenna selection, information calculating. A common hardware platform was built through the software radio technology, It was completed that the design of the principles prototype of the OFDM high speed modem and the system transmitting terminal and a receiving terminal. Through the system simulation, test validation and indicators testing, the correctness of system design was proved.