Supercharge Your Innovation With Domain-Expert AI Agents!

A Joint Method of Adaptive Modulation Coding and Adaptive Threshold Adjustment

An adaptive modulation and adaptive threshold technology, applied in digital transmission systems, electrical components, error prevention, etc., can solve problems such as performance degradation, achieve maximum system throughput, improve spectrum efficiency, and solve the effects of significant performance degradation

Inactive Publication Date: 2016-03-30
HARBIN INST OF TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the performance of the AMC method will decrease significantly when the channel characteristics change greatly, that is, how to ensure that the communication system can still perform optimal transmission when the channel characteristics change greatly, so that The present invention proposes a joint method of adaptive modulation coding and adaptive threshold adjustment

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Joint Method of Adaptive Modulation Coding and Adaptive Threshold Adjustment
  • A Joint Method of Adaptive Modulation Coding and Adaptive Threshold Adjustment
  • A Joint Method of Adaptive Modulation Coding and Adaptive Threshold Adjustment

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0064] Specific implementation mode one, combination figure 1 Specifically describing this embodiment, the specific operation steps of the joint method of adaptive modulation and coding and adaptive threshold adjustment described in this embodiment are as follows:

[0065] Step 1. In the offline state of the SC-FDE adaptive baseband system, perform system simulation on a given channel state to obtain a performance graph of the relationship between bit error rate and signal-to-noise ratio; according to the target error rate P e The limitation of dividing the signal-to-noise ratio fading area [γ i ,γ i+1 ), and determine the switching threshold of the modulation coding strategy γ i ; By searching for all areas that satisfy P e The required optimal modulation and coding strategy is determined to determine the optimal modulation and coding strategy switching table, the SC-FDE adaptive baseband system is a block transmission system, and step 2 is executed;

[0066] Step 2: Determine wheth...

specific Embodiment approach 2

[0073] Specific embodiment two, the difference between this embodiment and the joint method of adaptive modulation and coding and adaptive threshold adjustment described in specific embodiment one is that the signal-to-noise ratio fading area described in step one [γ i ,γ i+1 ) Is determined by the following method: using the target error rate P e Make a straight line parallel to the horizontal axis in the performance curve of the relationship between the bit error rate and the signal-to-noise ratio, and obtain an intersection point with the performance curve of the relationship between the bit error rate and the signal-to-noise ratio of each strategy. The abscissa corresponding to each intersection is the switching threshold of the transmission strategy γ i , The SNR range between every two thresholds is the SNR fading area [γ i ,γ i+1 ).

specific Embodiment approach 3

[0074] Embodiment 3 The difference between this embodiment and the joint method of adaptive modulation and coding and adaptive threshold adjustment described in Embodiment 1 or 2 is that the step 1 described in step 1 searches for the fading area of ​​each SNR All meet P e The specific process of the required optimal modulation and coding strategy to determine the optimal modulation and coding strategy switching table is:

[0075] Search for all areas that meet the target error rate P in the fading area of ​​the signal-to-noise ratio e The required optimal transmission strategy corresponding to the fading area of ​​the signal-to-noise ratio, the target bit error rate P e The required optimal strategy constitutes an optimal strategy set, and the optimal transmission strategy switching table is determined according to the optimal transmission strategy set.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a conjoint method for AMC (Adaptive Modulation and Coding) and adaptive threshold adjustment (ATA), belongs to the field of wireless, and aims to solve the problem that when the characteristics of a channel are changed greatly, the performance of the channel is remarkably reduced in the AMC method. The conjoint method for the AMC and the adaptive threshold adjustment is provided to overcome the defects in the AMC technology when the characteristics of the channel are changed greatly. According to the method, not only is an optimal transmission strategy provided for an adaptive system according to current channel state information (CSI) to improve frequency spectrum efficiency, but also still carrying out optimal transmission is ensured by switching the threshold according to the modulation scheme when the characteristics of the channel are changed greatly. The method can provide the optimal transmission scheme to improve the frequency spectrum efficiency and reasonably regulate the threshold to adapt to the change of the channel so as to enable the communication system to better adapt to the complex electromagnetic environments of the wireless channel, and is suitable for the technical field of wireless communication.

Description

Technical field [0001] The present invention relates to the radio field, in particular to a joint method of adaptive modulation and coding and adaptive threshold adjustment. Background technique [0002] In order to overcome the time-varying and multipath effects of wireless multipath channels, and to achieve the purpose of improving the system's spectrum efficiency and maximizing throughput, adaptive modulation and coding (AMC) technology has attracted widespread attention. This technology can adaptively adjust transmission parameters such as transmission power, modulation mode, and code rate according to the current channel state information (CSI) to achieve the goal of maximizing average throughput. However, the use of the AMC method must solve how to reasonably set the switching threshold of the modulation and coding scheme (modulation and coding scheme, MCS). In the multipath time-varying channel, the signal-to-noise ratio (SNR) of the receiver is commonly used in wireless ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L5/00
Inventor 谭学治于洋迟永钢马琳殷聪张闯
Owner HARBIN INST OF TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com