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Signal modulation method, device and system

A technology for modulating signals and frequency domain signals, applied in multi-frequency code systems, baseband system components, shaping networks in transmitters/receivers, etc. problems, to achieve the effect of improving the transmission rate and user experience, reducing the demodulation time, and reducing the complexity

Active Publication Date: 2016-10-12
SHANGHAI HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a method, device and system for modulating a signal, which can solve the problem that the prior art cannot simultaneously satisfy higher average signal power and uplink coverage

Method used

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  • Signal modulation method, device and system
  • Signal modulation method, device and system
  • Signal modulation method, device and system

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Embodiment Construction

[0061] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on The embodiments of the present invention, and all other embodiments obtained by those skilled in the art without creative efforts, all belong to the protection scope of the present invention.

[0062] The terms "first", "second" and the like in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments described herein can be practiced in sequences other than those illustrated or described herein. ...

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Abstract

The invention provides a signal modulation method, device and system. The method comprises the steps that a sending end carries out periodic extension on a first frequency domain signal acquired by converting to-be-sent data into a frequency domain; the sending end uses a preset frequency domain filter to carry out filtering processing on the first frequency domain signal after the periodic extension to acquire a second frequency domain signal; the sending end maps the second frequency domain signal onto a target subcarrier used for transmitting the second frequency domain signal; and the sending end transforms the second frequency domain signal mapped onto the target subcarrier onto a time domain via inverse Fourier transform to acquire a time domain signal and modulates a baseband signal corresponding to the time domain signal onto the carrier to be sent. A peak-to-average ratio of the sending signal and the complexity of channel estimation of a receiving end can be reduced.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method, device and system for modulating a signal. Background technique [0002] The sending end adopts Orthogonal Frequency Division Multiplexing (English full name: Frequency Division Multiplexing, English abbreviation: OFDM) technology to send data, which can realize multi-carrier transmission and channel equalization, but due to the peak-to-average power ratio of OFDM signals, referred to as peak-to-average Ratio (full name in English: Peak to Average Power Ratio, English abbreviation: PAPR) is relatively large, and because the dynamic range of a general power amplifier is limited, when sending a signal with a higher power, the signal with a relatively large peak-to-average ratio is easy to enter the power The non-linear region of the amplifier leads to non-linear distortion of the signal, significant spectrum spread interference, in-band signal disto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L25/03
Inventor 朱有团
Owner SHANGHAI HUAWEI TECH CO LTD
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