Signal transmission method and device based on SCPC array and symbol space synthesis

Abstract

Embodiments of the present invention provide a signal transmission method and device based on SCPC array and symbol space synthesis, the method includes: performing serial-to-parallel conversion on the information to be sent to generate multiple parallel code streams; Two orthogonal subcarriers are modulated to generate multi-channel modulated sub-carriers; multiple antenna units are used to radiate the multi-channel modulated sub-carriers to space, and each antenna unit radiates one modulated sub-carrier, so that the antenna radiation area contains all Full-wave Orthogonal Frequency Division Multiplexing OFDM symbols with subcarrier information. Embodiments of the present invention provide a signal transmission method and device based on SCPC array and symbol space synthesis. Each modulated subcarrier inside the transmitter is processed by a transmission channel of the transmission array, and OFDM symbols are synthesized in space, so that the transmitter can achieve The lowest power consumption and heat dissipation are required for the same transmit power level, and correspondingly, the debugging and maintenance are the easiest.

Description

technical field [0001] Embodiments of the present invention relate to the field of communication technologies, and in particular, to a signal transmission method and device based on SCPC array and symbol space synthesis. Background technique [0002] The demand for communication in modern society is growing explosively. In order to achieve the maximum capacity of information transmission within limited spectrum resources, the industry has developed orthogonal frequency division multiplexing technology, which decomposes the high-speed information flow that needs to be transmitted into N low-speed code streams , respectively modulate N mutually orthogonal subcarriers to form a so-called Orthogonal Frequency Division Multiplexing (OFDM) symbol and send it to the destination. Different from the previous single-carrier modulation method, this OFDM symbol contains multiple equally spaced subcarriers, and each subcarrier independently carries the information to be transmitted. The ...

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Problems solved by technology

[0004] However, this method directly obtains full-wave OFDM symbols, which contain multiple carrier components, so the transmitter used to transmit such full-wave OFDM signals must strictly guarantee linearity during frequency conversion, amplification, etc., and avoid subcarrier The non-linear products generated by the intermodulation between them cause signal distortion. Usually, it is necessary to implement more power back-off or linear compensation measures for unstaged power amplifiers. As a result, such transmitters either have extremely low power supply efficiency and low power and heat dissipation pressure, or the composition is complex, and equipment debugging and maintenance are difficult

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