Digital microwave signal adjusting circuit

Abstract

The invention discloses a digital microwave signal adjusting circuit. The digital microwave signal adjusting circuit comprises an input impedance matching module, a baseband transmission modulation module and an output impedance matching module, wherein the input impedance matching module is used for carrying out isolation processing on the digital microwave signal, and transmitting the isolated digital microwave signal to an LC network for impedance matching; the baseband transmission modulation module comprises a signal lifting unit and a phase shift adjusting unit, the signal lifting unit has a good anti-noise effect and anti-attenuation performance, Gaussian noise is effectively suppressed, and nonuniformity and distortion of signals in a transmission band are prevented; and the phaseshift adjusting unit ensures the high utilization rate of bandwidth in the modulation process, enables phase shift adjustment to be more precise and effective, greatly reduces the error rate of signals, and finally outputs the signals after output impedance matching processing, so that digital microwave signal transmission is more accurate and reliable.

Description

technical field [0001] The invention relates to the technical field of digital microwave communication, in particular to a digital microwave signal adjustment circuit. Background technique [0002] Digital microwave is a digital wireless transmission system working in the microwave frequency band. Due to the characteristics of microwave transmission and the curved surface of the earth, a digital microwave line is usually composed of sections, and each section can be regarded as a point-to-point wireless communication system. . The purpose of using microwaves for communication is to transmit information over long distances. Digital baseband transmission does not move the spectrum of digital baseband signals. The digital baseband signal sequence output by the terminal equipment or the digital baseband signal after some code conversion (channel coding), The method of transmission using cables. The terrestrial digital microwave network has established a unique position with it...

AI Technical Summary

Problems solved by technology

The terrestrial digital microwave network has established a unique position with its large amount of information and low construction investment. The large-capacity (above 140Mb / s) digital microwave communication transmits a high amount of information, and the multi-path transmission from the ground and the atmosphere causes The fading of the signal will cause inhomogeneity and distortion in the signal transmission band, resulting in low bandwidth utilization and strong Gaussian noise in the modulation process of the signal, so that the inhomogeneity and distortion in the transmission band seriously affect the bit error rate and transmission reliability.

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