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Method for extracting signal parameters in paired carrier multiple access multiuser random access

A technology of carrier multiplexing and extraction method, which is applied in the communication between multiple stations, etc.

Inactive Publication Date: 2013-11-27
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention provides a signal parameter extraction method in paired carrier multiplexing multi-user random access, which solves the problem of paired carrier multiplexing multi-user random access signal parameter extraction of VSAT network

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  • Method for extracting signal parameters in paired carrier multiple access multiuser random access
  • Method for extracting signal parameters in paired carrier multiple access multiuser random access
  • Method for extracting signal parameters in paired carrier multiple access multiuser random access

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Embodiment Construction

[0025] The signal parameter extraction technology of paired carrier multiplexing multi-user random access of the present invention mainly includes the following parts:

[0026] (1) Realize the joint extraction of signal delay and frequency through the overall design;

[0027] (2) Realize the extraction of the amplitude and initial phase of the burst paired carrier multiplexing signal through the training sequence.

[0028] The premise of realizing the joint extraction of signal delay and frequency through the overall design is that all signals in the multi-user random access network of paired carrier multiplexing need to strictly realize time and frequency synchronization, and the benchmark of signal synchronization is network control frequency time and frequency The reference signal, and all users in the network need to measure the time difference and frequency difference between their transmitted signal and the time and frequency reference signal, and then correct the error ...

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Abstract

The invention discloses a method for extracting signal parameters in paired carrier multiple access (PCMA) multiuser random access. The method comprises the following steps of: extracting the amplitude and the initial phase of a signal by using a short training head in a PCMA frame, wherein the short training head uses a pulse compression signal which is Spulse(t)=exp{jpiu(t-T / 2)<2>}; and the received training head is Spulse-rec (T)=Aexp{jpiu(t-T / 2)<2>+theta0}, where A is the amplitude of the signal, and theta0 is the initial phase of the PCMA signal; multiplying the received training head by a signal s(t) =exp{-jpiu(t-T / 2)<2>}; cumulating the multiplied result of two sequences to obtain a result of MAexp(theta0), where M is the cumulative frequency; calculating the absolute value of the cumulated result; dividing the result by M to obtain the amplitude A; and calculating the phase angle of the cumulated result to obtain the initial phase.

Description

technical field [0001] The invention belongs to the technical field of VSAT satellite communication, and in particular relates to a method for extracting signal parameters in the user channel allocation process of the multi-user random access technology with paired carrier multiplexing. Background technique [0002] VSAT satellite communication system has been widely used due to its portability, flexibility, low price, and ease of use. With the increase of traffic and users, bandwidth resources become very valuable; and paired carrier multiplexing technology (PCMA, Paired Carrier Multiple Access) as a new satellite communication multiple access method, its spectrum utilization efficiency has been increased by 100%, and it also has the characteristics of high data security. If the carrier pair multiplexing technology can be introduced into VSAT satellite communication, both Advantages to reduce system operating costs. [0003] However, the VSAT satellite communication system...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/26
Inventor 汪春梅孙洪波
Owner SHANGHAI NORMAL UNIVERSITY