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Pseudo-code auxiliary carrier synchronization implementation method for terahertz communication

An implementation method and auxiliary carrier technology, which is applied in the direction of modulated carrier system, multi-frequency code system, digital transmission system, etc., can solve the problems of increased difficulty in signal processing, high sampling rate, and large hardware overhead

Active Publication Date: 2018-06-19
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Claims
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Problems solved by technology

[0005] Aiming at the problems of high carrier frequency offset and high sampling rate caused by the existing terahertz communication system, the difficulty of signal processing is increased and the hardware overhead is too large

Method used

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  • Pseudo-code auxiliary carrier synchronization implementation method for terahertz communication
  • Pseudo-code auxiliary carrier synchronization implementation method for terahertz communication
  • Pseudo-code auxiliary carrier synchronization implementation method for terahertz communication

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Embodiment 1

[0085] In order to verify the feasibility of this method, taking the binary phase shift keying (Binary Phase Shift Keying, BPSK) modulation method as an example, specific steps are given for this realization method, and the parameters used in it are: data information rate R b : 10Gbps; the rate R of inserting the spreading code pilot signal c : 30.69MHz; Spreading ratio L: 1023; Terahertz carrier frequency f THz : 340GHz; the sending end and the receiving end move towards each other, the relative speed v: 13235.29m / s; the signal-to-noise ratio SNR: 15dB; the narrow-band low-pass filter bandwidth B: 50MHz; the low sampling rate ADC sampling rate f s : 100MHz; broadband low-pass filter bandwidth: 10.01GHz.

[0086] Such as figure 1 As shown, a pseudocode-assisted carrier synchronization implementation method for terahertz communication disclosed in this embodiment, the specific implementation steps are as follows:

[0087] Step 1, the structure of the sender is as follows f...

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Abstract

The invention discloses a pseudo-code auxiliary carrier synchronization implementation method for terahertz communication, and belongs to the field of communication signal processing. The method comprises the following steps: inputting a data baseband signal with a low-power spread spectrum code pseudo-random sequence pilot inserted into a digital to analog converter DAC by a sending end, and after analog mixing is carried out on analog signals output by the DAC and a terahertz carrier, sending the analog signals to a wireless channel by an antenna; using local two paths of orthogonal terahertz carriers to mix with the received signals to obtain I and Q two paths of baseband signals by a receiving end; using a narrowband low-pass filter to filter the I and Q two paths of signals after orthogonal mixing to extract a pilot part; calculating the pilot carrier frequency offset, that is the data signal carrier frequency offset in real time and accurately by capturing and tracking the pilotpart; and continuously modifying the frequency of the local terahertz carrier by using the frequency offset to complete the carrier synchronization. The pseudo-code auxiliary carrier synchronization implementation method for the terahertz communication provided by the invention can reduce the signal processing calculation amount, and reduce the complexity of the hardware circuit design and implementation.

Description

technical field [0001] The invention relates to a method for realizing carrier synchronization, in particular to a pseudo-code-assisted carrier synchronization method for terahertz communication, which belongs to the field of communication signal processing. Background technique [0002] The frequency band of terahertz wave is 0.1-10THz, and the wavelength is between 30μm-3mm. It is an electromagnetic wave between microwave and infrared, and its frequency is 1-4 orders of magnitude higher than that of existing microwave communication. Terahertz communication has the characteristics of rich bandwidth resources, high transmission rate, and low transmission interference, which meets the application requirements of high-speed wireless transmission in future communication systems. However, the high transmission rate also increases the difficulty of signal processing. [0003] In the process of wireless communication, due to the relative movement between the signal transmitting en...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L27/00
CPCH04L27/2665H04L27/2675H04L2027/0026
Inventor 丁旭辉刘德康张卫东汪菲聂之君宋世琦尹雪卜祥元安建平李建国马思奇
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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