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Method and device of signal modulation

A technology of signal modulation and modulation method, applied in the field of modulation, which can solve the problems of large inter-symbol interference of two demodulated signals, and achieve the effect of improving reliability and reducing inter-symbol interference

Active Publication Date: 2015-07-08
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] This modulation method makes the intersymbol interference of the demodulated two-way demodulated signal at the non-sampling point larger

Method used

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  • Method and device of signal modulation
  • Method and device of signal modulation
  • Method and device of signal modulation

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Embodiment Construction

[0036] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0037] In addition, the term "and / or" in this article is only an association relationship describing associated objects, which means that there may be three relationships, for example, A and / or B, which may mean: A exists alone, A and B exist at the same time, There are three cases of B alone. In addition, the character " / " in this article generally indicate...

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Abstract

Embodiments of this application provide a signal modulation method and device. According to the embodiments of this application, a first input signal and a second input signal are received, a phase of the first input signal being the same as that of the second input signal, and further, phase shift processing is performed on the first input signal, so as to generate a third input signal, a difference between a phase of the third input signal and that of the first input signal being an odd multiple of pi, so that CAP modulation can be performed on the third input signal and the second input signal because a phase difference of an odd multiple of pi exists between two input signals that the CAP modulation is performed on.

Description

technical field [0001] The present application relates to modulation technology, in particular to a signal modulation method and device. Background technique [0002] From the perspective of current and future technology trends, in short-distance interconnection services, such as broadband access services or Asynchronous Transfer Mode (Asynchronous Transfer Mode, ATM) LAN services, etc., Carrierless Amplitude Phase (Carrierless Amplitude Phase, CAP) modulation technology for data modulation. In CAP modulation, two filters with a phase difference of π / 2 can be used to realize quadrature modulation. Since the multiplier is not used in CAP modulation, but the shaping filter is directly used to form a band-pass pulse, which reflects the transmitted data stream by changing the waveform of the in-phase input signal and the waveform of the quadrature input signal, so this technology is called "no Carrier". [0003] In this modulation mode, the two channels of demodulated signals...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03H04L27/00
CPCH04L27/36
Inventor 左天健
Owner HUAWEI TECH CO LTD