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An adaptive soft demodulation method based on the state of 5g downlink shared channel

A channel state, shared channel technology, applied in the field of communication, can solve the problem of reducing demodulation performance, and achieve the effect of strong anti-interference and good demodulation effect

Active Publication Date: 2022-03-11
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0017] The traditional demodulation technology is to select different demodulation methods according to different modulation methods, but in the transmission process of the wireless channel, it will experience various complex propagation paths, be interfered by different situations, and there will be real-time changes in the channel state, thus Reduced demodulation performance

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  • An adaptive soft demodulation method based on the state of 5g downlink shared channel
  • An adaptive soft demodulation method based on the state of 5g downlink shared channel
  • An adaptive soft demodulation method based on the state of 5g downlink shared channel

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Embodiment Construction

[0041] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

[0042] Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than physical drawings, and should...

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Abstract

The invention relates to an adaptive soft demodulation method based on the state of a 5G downlink shared channel, belonging to the technical field of communication. For the 5G downlink shared channel, this method is compatible with two types of demodulation methods, QPSK and QAM, and adopts the mechanism of dynamic detection of the channel state and the comparative analysis of the distance range from the signal point to the constellation point to obtain the most suitable demodulation method for real-time channel transmission. Adaptive soft demodulation under dynamic channel conditions is realized. The present invention directly determines the selected demodulation mode according to the value range by calculating the distance from the signal point to the constellation point. Abandoning the traditional way of calculating the distance from the received signal to the constellation point fixedly, and further adapting to different channel environment changes.

Description

technical field [0001] The invention belongs to the technical field of communications, and relates to an adaptive soft demodulation method based on the state of a 5G downlink shared channel. Background technique [0002] Demodulation is the process of recovering a message from a modulated signal that carries it. In various information transmission or processing systems, the sending end modulates the carrier wave with the message to be transmitted to generate a signal carrying the message, and the receiving end must recover the transmitted message before it can be used. This process is the demodulation process . In a wireless communication system, the decoding at the receiving end usually uses soft information input, so in order to improve system performance, soft information demodulation based on logarithmic likelihood ratio is used, that is, soft demodulation. [0003] Demodulation is the inverse process of modulation. Different modulation methods have different demodulat...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/00
CPCH04L27/0012
Inventor 程方王泽宽张治中毛亚丽
Owner CHONGQING UNIV OF POSTS & TELECOMM
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