A Study On Frequency Transposition And Power Amplification Technique Based On TD-LTE

With the changing of the battlefield circumstances and demand of the campaign, as well as the development of communicating technology, the modern tactics communication system has developed towards the broadbandization and the High-speed gradually.The current technology can not meet the demand of the modern battlefield’s communications, however the civil communicating technology has developed rapidly, especially for the fourth generation mobile communication system on the TD-LTE, it has much faster rate of data signaling, much higher efficiency of spectrum utilization, much better communication architecture and other outstanding characteristic, are qualified for the tactics communication system’s modernization construction.This research topic is based on the TD-LTE mobile communication system and focusing on the disadvantage of the mobile communication technology when its application on the tactics communication, to enhance TD-LTE mobile communication’s transmission distance, improve its anti-interference ability and meet development of the tactics communication technology, through the frequency’s alternation, wireless transmitted power’s magnification and other technique’s research.By means of the research, The TD-LTE mobile communication system moved to the lower end part of the UHF band from the original communication band, the average transmit power is 10 dB more than the original RF power. Based on the transmission rate of the cell edge up to 10Mbps, the cell coverage range up to 20 km or more.Firstly the article introduces the system structure of the TD-LTE mobile communication system, the RF circuit is focused on research. Then it introduces how to realize the Frequency conversion and the Power amplification. As the most important part of the paper, the key technology for the research are studied fuether. By means of the testing simulation and independent research and development, this research is about the realization principle prototype and completes the relevant functional verification and performance test. Finally the paper summarizes the research results, suggests the improvement of the insufficient place.The new research exhibits high application potential for Strong universality relative to high performance.