A synchronization method for terahertz communication
An implementation method and signal technology, applied in the direction of synchronization devices, synchronization devices, wireless communication, etc., can solve the problems of increased difficulty in signal processing and large hardware overhead
Active Publication Date: 2020-07-28
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is: the high-frequency deviation, code deviation and high sampling rate caused by the terahertz communication system increase the difficulty of signal processing and the problem of excessive hardware overhead, and provide a synchronization method for terahertz communication
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Embodiment 1
[0100] In order to verify the feasibility of this method, the Binary Phase Shift Keying (BPSK) modulation is taken as an example, where the information rate R b : 10Gbps, insert pilot frequency f 0 : 10GHz, carrier frequency f c : 340GHz, relative movement speed v: 7900m / s, bandwidth B of low-pass filter 1: 10MHZ, bandwidth B' of low-pass filter 2: 5MHZ, first sampling rate f s : 40MHz, second sampling rate f s ': 10MHz, signal-to-noise ratio SNR: 10dB, fast Fourier transform FFT points N: 32768.
[0101] like figure 1 As shown, the synchronization method for terahertz communication disclosed in this embodiment, the specific implementation steps are as follows:
[0102] Step 1, the structure of the sender is as follows figure 2 shown, the data baseband signal R b The information rate is 10Gbps, that is, the first zero of the spectrum of the data baseband signal m(t) is located at f 0 =R b =10GHz, that is, the inserted single-tone pilot frequency is 10GHz. The combine...
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The invention discloses a terahertz communication synchronization method, which belongs to the field of communication signal processing. According to the invention, a baseband signal inserted into a pilot frequency is upconverted to a terahertz band and transmitted to a wireless channel; after a wireless signal passes through a low noise amplifier, the first time of analog quadrature mixing is carried out to filter out high frequency components; after filtering is carried out again through a narrowband filter, downsampling, squared demodulating and fast Fourier transform are carried out in order; the maximum peak position is searched to find the corresponding frequency offset; the frequency offset is fed back to a local oscillator, so that the carrier frequency of a receiving end and the carrier frequency of a received signal are dynamically synchronized; the baseband signal with offset is acquired; the second time of analog quadrature mixing is carried out to filter out high frequencycomponents; sampling and fast Fourier transform are carried out; the signal peak is observed to acquire the estimated value of the frequency and the phase offset; and the frequency and phase of the sampling clock of a high-speed analog-to-digital converter are compensated to realize terahertz communication synchronization. According to the invention, the signal processing difficulty and hardwareoverhead can be reduced.
Description
technical field [0001] The invention relates to a synchronization method for terahertz communication, in particular to a carrier synchronization and bit timing synchronization method for terahertz communication, belonging to the field of communication signal processing. Background technique [0002] Terahertz (THz) waves are electromagnetic wave bands with electromagnetic frequencies between 0.1 and 10 THz (wavelengths between 3 μm and 30 mm), between microwaves and far-infrared light, and in the transition zone from macroscopic classical theory to microscopic quantum theory. The last frequency band that has not yet been fully recognized and utilized. Terahertz communication is the communication using terahertz waves as the information carrier, which integrates the advantages of microwave communication and optical communication. Compared with the two existing communication methods, terahertz communication shows some unique and excellent properties. First, terahertz communica...
Claims
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IPC IPC(8): H04L27/00H04W56/00H04B10/90H04L7/00
CPCH04B10/90H04L7/007H04L27/0014H04L2027/0026H04W56/0035
Inventor 丁旭辉尹雪宋世琦聂之君汪菲刘德康卜祥元安建平李建国马思奇张卫东
Owner BEIJING INSTITUTE OF TECHNOLOGYGY