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SI-DFT-s-OFDM system for terahertz communication

A terahertz, si-dft-s-ofdm technology, applied in the field of terahertz communication, can solve problems such as sacrificing data rate and not being applicable to THz systems

Active Publication Date: 2021-05-28
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, OFDM has high PAPR and may not be suitable for THz systems
In contrast, pure single-carrier waveforms achieve distance estimation by using coded sequences with good autocorrelation properties, but at the expense of data rate

Method used

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  • SI-DFT-s-OFDM system for terahertz communication

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Embodiment Construction

[0014] Such as figure 1 As shown, this embodiment relates to a SI-DFT-s-OFDM system for terahertz communication, including: a communication-aware sending end, a sensing receiving end, and a communication receiving end, wherein: the communication-aware sending end transmits data according to the transmitted data source The communication information is digitally modulated, digital-to-analog conversion (DAC) processed and output SI-DFT-s-OFDM modulated radio frequency signal, and the sensing receiver performs analog-to-digital conversion (ADC), digital demodulation, parameter estimation processing and The target distance and speed estimation results are output, and the communication receiving end performs analog-to-digital conversion and digital demodulation processing according to the received signal and outputs communication information.

[0015] The specific steps of the parameter estimation process include:

[0016] Step 1. Perform channel estimation according to the receive...

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Abstract

An SI-DFT-s-OFDM system for terahertz communication comprises a communication sensing sending end, a communication receiving end connected with the communication sensing sending end through a terahertz wireless communication channel and a sensing receiving end connected with the communication sensing sending end through a sensing channel. The communication sensing sending end modulates communication data and transmits a terahertz wireless signal, the sensing receiving end receives the terahertz wireless signal reflected by a target, the distance and the speed of the target are output through parameter estimation, and the communication receiving end performs digital demodulation according to the received terahertz wireless signal and outputs the communication data. According to the invention, the sensing function is integrated into the DFT-s-OFDM system, the terahertz channel characteristics are fully utilized, and the peak-to-average power ratio of the transmitted signal is reduced.

Description

technical field [0001] The present invention relates to a technology in the field of terahertz communication, in particular to a perceptually integrated discrete Fourier transform orthogonal frequency division multiplexing (SI-DFT-s-OFDM) system for terahertz communication. Background technique [0002] THz joint communication and sensing (THz joint communication and sensing) technology integrates communication and perception while providing services including radar perception, positioning, imaging and spectrogram. But since the propagation loss and reflection loss in free space become stronger in the THz frequency band, the effective number of rays of the communication link is reduced. Directional antennas are used to provide high antenna gain and compensate for severe path loss, thereby increasing the coherent bandwidth of the communication channel. Second, the power amplifier (PA) efficiency of the transmitter at higher frequencies is more sensitive to the peak-to-averag...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04B10/90
CPCH04B10/90H04L27/2614H04L27/2636H04L27/2647
Inventor 韩充吴永知
Owner SHANGHAI JIAO TONG UNIV
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