Adaptive modulation coding method and apparatus

A technology of adaptive modulation and coding method, applied in the field of communication, can solve the problems of video pause, different anti-error ability, poor anti-error ability, etc., to reduce error rate, improve spectral efficiency, and strong adaptability Effect

Active Publication Date: 2009-04-01
CHINA MOBILE COMM GRP CO LTD
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Problems solved by technology

Different services have different requirements for transmission error rate and signal-to-noise ratio. If there is a bit error in the transmission of real-time video services, it may cause video pauses and seriously affect user experience; Even if there are a small amount of bit errors, it will not have much impact on the user experience
Different modulation and coding methods have different ant

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  • Adaptive modulation coding method and apparatus
  • Adaptive modulation coding method and apparatus
  • Adaptive modulation coding method and apparatus

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[0033] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0034] Since the existing AMC only considers the current signal-to-noise ratio and does not consider the adaptability to service types, the modulation and coding methods adaptively selected by the existing AMC may have the best performance for one service type, while for Another business type is poorer performance. For example, in order to pursue the highest spectral efficiency, the existing AMC technology is optimal for non-real-time Internet access services by selecting modulation and coding methods, but the anti-error capability of this modulation and coding method with the highest spectral efficiency is relatively poor in channels. The environment is not optimal for real-time video services, because this modulation and coding method will affect the quality of real-time video services and cause more video pauses.

[0035] The purpose of the embodi...

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Abstract

The invention discloses a self-adaptive modulation and coding method and a device thereof. The method comprises the following steps: obtaining the existing signal-to-noise ratio and service type parameters of a channel transmitting data; determining the modulation mode and coding rate according to the signal-to-noise ratio and the service type parameters; and modulating and coding according to the determined modulation mode and coding rate. The self-adaptive modulation and coding method and the device have strong service adaptability, can perform the modulation and coding according to different service types used by users, which can guarantee the feeling of the users, maximize the frequency spectral efficiency of the system and reduce the error rate.

Description

technical field [0001] The present invention relates to communication technology, in particular to an adaptive modulation and coding method and device. Background technique [0002] AMC (Adaptive Modulation Coding, Adaptive Modulation Coding and Modulation) is a link adaptation technology that uses more coding rates and multiple modulation methods, such as QPSK (Quadrature PhaseShift Keying), 16QAM (Quadrature Amplitude Modulation, quadrature amplitude modulation), 64QAM, etc. AMC technology sets an adaptive optimal modulation and coding scheme for each user according to the link quality to compensate for the fading effect caused by channel changes on the received signal, thereby The SNR (Signal-to-Noise Ratio, signal-to-noise ratio) of the signal is improved. In the fading channel, the adoption of AMC technology can significantly increase the throughput of the system. [0003] At present, in the high-speed data services of various wireless standards, such as EGPRS (enhanc...

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Application Information

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IPC IPC(8): H04L1/00H04L27/34
Inventor 李新盛震山
Owner CHINA MOBILE COMM GRP CO LTD
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