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Method and apparatus for quadrature signal modulation

A signal and amplitude modulation technology, which is applied in the direction of modulation carrier system, coding, digital transmission system, etc., can solve the problems of high error rate and problems

Active Publication Date: 2018-11-09
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, such communication must contend with the presence of noise such as thermal and phase noise, and other constraints such as transmitter power limitations
Phase noise (frequency offset) is especially problematic at higher frequencies such as 60GHz and above, and can arise from imperfect oscillators in both the transmitter and receiver
Using higher-order QAM in the presence of thermal noise, phase noise, and other constraints can result in unacceptably high error rates, especially for high-frequency communication systems

Method used

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  • Method and apparatus for quadrature signal modulation
  • Method and apparatus for quadrature signal modulation
  • Method and apparatus for quadrature signal modulation

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Embodiment Construction

[0049] Embodiments of the present invention relate to a method and apparatus for wireless communication using a digital QAM signal constellation as described herein. The method includes modulating and / or demodulating a signal according to the described constellation using a wireless transmitter and / or receiver or associated signal processing electronics. The apparatus includes a wireless transmitter and / or receiver or associated signal processing electronics configured to modulate and / or demodulate signals according to the described constellation. As used herein, QAM generally refers to any amplitude modulation, including in-phase and quadrature components, used to modulate two carrier signals in quadrature with each other. For example, phase shift keying is considered a specific form of QAM.

[0050] Embodiments of the invention may be used to communicate information wirelessly between a transmitter and a receiver. For example, this information may include control plane dat...

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Abstract

Methods and apparatus for facilitating wireless communication using digital Quadrature Amplitude Modulation are disclosed. A mapping module electronic component of a wireless communication device utilizes a signal constellation for quadrature modulating a signal for transmission or quadrature demodulating a received signal. The signal constellation includes multiple constellation symbols and associated bit sequences. Specific signal constellations are disclosed. The signal constellations may be obtained through an optimization procedure which accounts for both phase noise and power amplifier nonlinearity.

Description

technical field [0001] The present invention relates to the field of wireless communication, and particularly relates to a method and a device for performing quadrature amplitude modulation using a specific quadrature amplitude modulation constellation diagram. Background technique [0002] Quadrature amplitude modulation (quadrature amplitude modulation, QAM) has been widely used in wired and wireless digital communication systems. In digital QAM schemes, a QAM constellation is specified by both its magnitude and phase in quadrature coordination. Phase-shift keying (PSK) modulation can be considered as a special case of QAM, where the amplitude of the PSK modulation scheme is constant and the PSK constellation is equally spaced on a circle. [0003] The purpose of digital QAM is to transfer messages from a transmitter to a receiver. However, such communications must contend with the presence of noise such as thermal and phase noise, as well as other constraints such as tr...

Claims

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Application Information

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IPC IPC(8): H04L27/34
CPCH04L27/3422H03M13/152H04B1/02H04L27/36
Inventor 基多·蒙托里西塞吉奥·贝勒迪多辛岩颜敏
Owner HUAWEI TECH CO LTD
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