Spectrum-spread type PDH microwave communication system and method

Abstract

The invention provides a spectrum-spreading PDH microwave communication system and a method. The system comprises a transmitting device consisting of a broadband spectrum-spreading module, a medium frequency modulation module and a microwave emitter; a receiving device consisting of a broadband de-spreading module, a medium frequency demodulation module and a microwave receiver; an OFDM modulation module consisting of a first serial-to-parallel module, an IFFT module and a first parallel-to-serial module; and an OFDM demodulation module consisting of a second serial-to-parallel module, a FFT module and a second parallel-to-serial module, wherein the broadband spectrum-spreading module includes broadband spectrum-spreading sub-modules numbering N connected with each other in parallel between the first serial-to-parallel module and the IFFT module; and the broadband de-spreading module comprises N broadband de-spreading sub-modules connected with each other in parallel between the FFT module and the second parallel-to-serial module. The system can improve the RF spectrum utilization rate of spectrum-spreading microwave, increase number of independent channels, obviate mutual interface among spectrum-spreading microwaves in the same area, and remarkably improve spreading gain.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a spread spectrum PDH microwave communication system and method. Background technique [0002] In the past several years, in solving the point-to-point wireless transmission problem, people have adopted a large number of PDH microwaves, that is, Plesiochronous Digital Hierarchy (PDH) microwaves. They have 7G / 8G and 13G / 15G, none of them use spread spectrum technology, we call them conventional PDH microwave. With the continuous development of communication technology, people's requirements for communication quality are gradually increasing. These conventional PDH microwaves can no longer meet the requirements of wireless data transmission. Spread spectrum communication (Spread Spectrum Communication) is a major breakthrough in contemporary communication technology. In the 1990s, civil spread spectrum microwave came into being. More and more people apply spread spectrum tech...

AI Technical Summary

Problems solved by technology

[0011] In order to solve the problems of low utilization rate of radio frequency spectrum of spread spectrum microwave used in point-to-point wireless data transmission in the prior art, few independent channels, mutual interference between spread spectrum microwaves in the same area, and low spread spectrum gain, the present invention provides a spread spectrum microwave Frequency PDH Microwave Communication System and Method

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