5G broadcast transmitting system based on distributed power amplifier

Abstract

The invention discloses a 5G broadcast transmitting system based on a distributed power amplifier, and the system comprises: an adaption and modulation-demodulation module which is used for synchronizing a signal source and modulating and demodulating the signal source into a broadband radio frequency signal; a broadband pre-stage power amplifier module which is used for carrying out pre-amplification on the modulated and demodulated broadband radio frequency signal; a power divider module which is connected to the broadband preceding-stage power amplifier module through a main feeder line andis used for carrying out 1: N power distribution on the broadband radio frequency signals amplified by the broadband preceding-stage power amplifier module; and N distributed power amplifier unit modules which amplify the broadband radio frequency signals amplified by the pre-power amplifier again, and directly feed the amplified broadband radio frequency signals into the cross polarization on-board antennas in one-to-one correspondence. According to the 5G broadcast transmitting system, the centralized amplified power amplifier of an HPHT and MPMT transmitting system can be improved into a distributed power amplifier, high-power main feeder loss and high-power synthesizer loss are avoided, the efficiency of a transmitter can be effectively improved, and the cost of the transmitter is reduced.

Description

technical field [0001] The present invention relates to the field of 5G broadcasting, in particular to a distributed power amplifier-based 5G broadcasting transmission system. Background technique [0002] How to realize the "highlighting the strategy of mobile priority" and how to build a "5G-oriented mobile interactive TV broadcasting technology system" are the top priorities of Smart Broadcasting. [0003] With the rapid growth of high-quality audio-visual media content consumption such as 4K / 8K and VR / AR, and the trend of diversification and refinement of broadcast and TV business forms, the existing broadcast and TV networks cannot meet the needs of consumers to upgrade their consumption experience. Especially in the 5G era, high-speed mobile communication networks can carry and disseminate richer audio and video content, and will also become an important communication channel for radio and television media. [0004] The three aspects of transmission content, coverage ...

AI Technical Summary

Problems solved by technology

[0012] (1) The cost of traditional HPHT is high. Due to HPHT, high-standard computer rooms and high towers need to be built, and air conditioners, high-power power supply systems and professional technicians are also required. The construction and maintenance costs are very high, which is not suitable for the actual situation in our country.

[0013] (2) The transmission efficiency of traditional HPHT is low. Since the high-power tower (HPHT) needs multiplexers, main feeders, power dividers, sub-feeders and other supporting facilities, the power loss of the 5KW transmitter to the antenna needs at least 3~ 6dB

[0014] (3) Many scenarios of traditional HPHT have invalid coverage. Because HPHT adopts omnidirectional coverage, there is no difference in coverage regardless of whether there are users or not, and AI cannot be used to intelligently mobilize resources for redistribution, resulting in a great waste of limited frequency and power resources.

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