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Terahertz multi-carrier communication system

A multi-carrier communication and terahertz technology, applied in the field of terahertz communication, can solve the problems of limiting the communication rate of the terahertz communication system, reducing the efficiency of spectrum resource utilization, and unable to fully utilize the advantages of the large bandwidth of the terahertz frequency band, to prevent energy consumption. waste, prevent aliasing, avoid wasteful effects

Pending Publication Date: 2019-06-28
四川众为创通科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, solid-state terahertz communication systems based on semiconductor technology are all single-carrier solutions, which can only realize signal processing from a single digital-to-analog converter (DAC) to a single analog-to-digital converter (ADC), and are limited by the development of the ADC. At present, the sampling rate of commercial ADC chips is only 10.25GSPS. The single-carrier solution can only use a part of the spectrum resources in the terahertz channel, and cannot give full play to the advantages of the large bandwidth of the terahertz frequency band, which limits the communication rate of the terahertz communication system and reduces the frequency spectrum. resource efficiency

Method used

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Embodiment 1

[0034] This embodiment proposes a terahertz multi-carrier communication system, which includes a transmitter and a receiver. In this embodiment, N channels of DAC signals are moved to different frequency bands in the transmitter for combination, and then the combined signals are moved to the terahertz channel; N is a positive integer greater than or equal to 2; similarly, in the receiver, the The mixer is mixed and moved to the intermediate frequency and divided into N signals, each signal is processed separately by its own ADC; that is, the multi-carrier method is used to maximize the use of the spectrum resources of the terahertz signal. Under normal circumstances, the communication rate is N times that of the single-carrier system, and the utilization efficiency of spectrum resources is also greatly improved.

[0035] Such as figure 1 and2 As shown, the transmitter includes a transmitter terahertz antenna, a transmitter terahertz radio frequency front end, a transmitter in...

Embodiment 2

[0049] Based on the above-mentioned embodiment 1, this embodiment 2 proposes a terahertz dual-carrier communication system, that is, when N=2.

[0050] Such as image 3 and 5 As shown, the terahertz dual-carrier communication system includes a transmitter and a receiver, and the transmitter includes a transmitter terahertz antenna, a transmitter terahertz radio frequency front end, a transmitter intermediate frequency dual-carrier circuit and a transmitter baseband circuit; The receiver includes a receiver terahertz antenna, a receiver terahertz radio frequency front end, a receiver intermediate frequency dual-carrier circuit and a receiver baseband circuit.

[0051] The transmitter works as Figure 4 shown. The two DACs respectively generate two modulated signals and input them to the IF dual-carrier circuit. One of the signals passes through the IF mixer for frequency shifting, and then passes through the duplexer to combine the modulated signals of two different frequenc...

Embodiment 3

[0055] The difference between this embodiment and the above-mentioned embodiment is that a terahertz bandpass filter is added at the back end of the mixer of the transmitter and the front end of the mixer of the receiver to effectively suppress a sideband, such as Figure 7 and Figure 8 shown. In this embodiment, a terahertz bandpass filter is used to effectively filter out one sideband, which prevents energy waste caused by simultaneous transmission of two sidebands, and also avoids waste of signal channel resources.

[0056] The working principle of the transmitter in this embodiment: the multi-channel DACs respectively generate N-channel modulated signals and input them to the intermediate frequency multi-carrier circuit, wherein the N-1-channel signals are respectively moved to different frequencies through respective intermediate frequency mixers, and then passed through multiple The multiplier combines the modulated signals of N channels of different frequency bands in...

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Abstract

The invention discloses a terahertz multi-carrier communication system. The system comprises a transmitter and a receiver. The transmitter comprises a transmitter terahertz antenna, a transmitter terahertz radio frequency front end, a transmitter intermediate frequency circuit and a transmitter baseband circuit. The receiver comprises a receiver terahertz antenna, a receiver terahertz radio frequency front end, a receiver intermediate frequency circuit and a receiver baseband circuit. The transmitter baseband circuit comprises N paths of DACs, and the receiver baseband circuit comprises N paths of ADCs, wherein N is a positive integer greater than or equal to 2. According to the invention, the front-end circuit part is improved, N paths of DAC signals are moved to different frequency bandsfor combining. According to the technical scheme of the invention, the Terahertz signal is combined and then the combined signal is moved to the Terahertz channel, namely, a multi-carrier mode is adopted, the spectrum resource of the Terahertz channel is utilized to the maximum extent, the communication rate is N times of that of a multi-carrier system under the condition of the same ADC samplingrate, and meanwhile, the use efficiency of the spectrum resource is greatly improved.

Description

technical field [0001] The present invention relates to the technical field of terahertz communication, in particular to a terahertz multi-carrier communication system. Background technique [0002] In the electromagnetic spectrum family, terahertz (Terahertz, THz) waves with frequencies ranging from 0.1 THz to 10 THz occupy a special position between the frequency bands of electronics and photonics research. In the development of science and technology, the research, development and utilization of this frequency band was restricted by the scientific research methods and technical conditions at that time and developed late. It was once called the "gap" in the electromagnetic spectrum. Research and technology development are limited to the fields of astrophysics and radio astronomy, where molecular spectroscopy at terahertz frequencies is required to probe the material composition of the universe. With the advancement of science and technology, and because of the particulari...

Claims

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Application Information

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IPC IPC(8): H04B1/04H04B1/16H04B1/00
Inventor 张波牛中乾陈波
Owner 四川众为创通科技有限公司
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