Pseudo code assistance based synchronization method for THz communication

Abstract

The invention discloses a pseudo code assistance based synchronization method for THz communication, and belongs to the field of communication signal processing. A sending end inserts a pseudo randomsequence carrier synchronizing pilot to a zero frequency position of a data baseband signal frequency spectrum, and inserts a pseudo random sequence bit synchronizing pilot into a first zero point f0of the data baseband signal frequency spectrum; and then such combined signal is input to a DAC (Digital To Analog Converter), and after an output analog signal is mixed with a THz carrier, an obtained signal is sent to a wireless channel by an antenna. A receiving end carries out primary mixing with the received signal by utilizing a local quadrature THz carrier, and extracts a carrier synchronizing pilot; by capturing and tracking the carrier synchronizing pilot, a data signal is assisted in implementing carrier synchronization; after carrier synchronization, an I-path signal after primary mixing and a carrier with a frequency of F0 are subjected to secondary quadrature mixing, and a bit synchronizing pilot is extracted; and by capturing and tracking the bit synchronizing pilot, the datasignal is assisted to implement bit synchronization. According to the invention, a signal processing operation amount and complexity of hardware circuit implementation can be reduced.

Description

A Synchronization Method for Terahertz Communication Based on Pseudocode Assistance technical field The invention relates to a synchronization method for terahertz communication, belonging to the field of communication signal processing. The synchronization method includes a carrier synchronization method and a bit synchronization method. Background technique Terahertz (THz) wave is an electromagnetic wave band with an electromagnetic frequency between 0.1-10THz (wavelength 3mm-30μm), between microwave and far-infrared light, and located 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 ...

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Problems solved by technology

In view of the above-mentioned defects in the existing synchronization methods for terahertz communication, the technical problem to be solved by a pseudo-code-assisted synchronization method for terahertz communication disclosed by the present invention is: in terahertz communication, by extending The frequency code pseudo-random (Pseudo-Noise Code, PN) sequence pilot is assisted to realize carrier synchronization and bit timing synchronization under the condition of low signal-to-noise ratio and low sampling rate, which can reduce the amount of signal processing calculations, thereby reducing hardware circuit design and implementation complexity

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