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Multi-carrier synchronization method and system for nested loop pn sequence

A nested, multi-carrier technology, applied in modulation carrier systems, multi-frequency code systems, transmission systems, etc., can solve the problems of high frequency offset estimation accuracy and low computational complexity.

Active Publication Date: 2019-09-27
HANGZHOU DIANZI UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method with lower complexity and better frequency offset estimation performance for the existing digital communication carrier synchronization that cannot have low computational complexity and high frequency offset estimation accuracy at the same time. The multi-carrier synchronization method and system of the nested cyclic PN sequence are applicable to digital communication fields such as terrestrial wireless communication, satellite and power line communication suitable for low signal-to-noise ratio transmission and harsh clutter interference

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  • Multi-carrier synchronization method and system for nested loop pn sequence
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  • Multi-carrier synchronization method and system for nested loop pn sequence

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Embodiment Construction

[0075] The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

[0076] The carrier synchronization system and method provided by the present invention can be used in digital communication fields such as wireless and power line, and is not limited to the field of power line communication described in detail in the following embodiments. In the following, a typical field is selected to describe the specific implementation manner of the present invention in detail for the power line communication system and method.

[0077] The multi-carrier synchronization method of the nested cyclic PN sequence of this embodiment is realized through the following main steps in sequence:

[0078] (1) Using the existing method (for the method, see "Lu Hui, He Jing, Wang Gang. Algorithm for Generating Primitive Polynomials in Pseudorandom Sequences [J]. Computer Engineering, 2004, 30(16): 108-109."), generate ...

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Abstract

The invention discloses a multicarrier synchronization method and system of a nested recurrent PN sequence. According to the method, a carrier frequency offset estimation step and a frequency offset correction step are carried out successively, in the carrier frequency offset estimation step, the separated nested recurrent PN sequence is processed; and in the frequency offset correction step, the carrier frequency offset of a received signal is corrected. According to technical schemes of the invention, the method and device can be applied to the digital communication fields with low signal to noise ratio transmission and severe clutter interference, as ground wireless communication and satellite and power line communication.

Description

technical field [0001] The invention belongs to the technical field of digital communication, in particular to a multi-carrier synchronization method and system of a nested cyclic pseudo-random sequence (PN). Background technique [0002] In general, multi-carrier digital communications require good synchronization for effective reception of signals. In order to make full use of spectrum resources, it can be used for the transmission technology of asymmetric digital services, and effectively resist multipath effects. In digital communication technologies such as power lines and wireless, the current relatively mature technology of Orthogonal Frequency Division Multiplexing (OFDM) is often used. Modulation. However, it is extremely sensitive to synchronization deviation, and a small deviation can cause relatively large inter-carrier interference (ICI) and inter-symbol interference (ISI), thereby greatly affecting system performance. The basic principle of OFDM is to convert...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/00H04L27/26
Inventor 姜斌包建荣李阳光王天枢唐向宏
Owner HANGZHOU DIANZI UNIV
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