Check patentability & draft patents in minutes with Patsnap Eureka AI!

Adaptive modulation coding method and device

A technology of adaptive modulation and coding method, which is applied in the direction of adjusting channel coding, modulating carrier system, and devices dedicated to transmitters. And other issues

Active Publication Date: 2015-07-29
IBM CORP
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when there is interference in the working environment of the system, the signal-to-interference-noise ratio (SINR) estimated by the user terminal may not truly reflect the state of the wireless channel, resulting in the modulation and coding method determined according to this parameter is not the most suitable
If the modulation and coding mode of the user terminal is set too high, it will cause a large number of bit errors, making the system work very unstable. If the modulation and coding mode of the user is set too low, it will waste the system throughput

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
  • Adaptive modulation coding method and device
  • Adaptive modulation coding method and device
  • Adaptive modulation coding method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0013] Those skilled in the art know that the present invention can be implemented as a system, method or computer program product. Therefore, the present disclosure can be specifically implemented in the following forms, namely: it can be complete hardware, it can also be complete software (including firmware, resident software, microcode, etc.), and it can also be a combination of hardware and software. Called a "circuit", "module" or "sy...

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

An adaptive modulation coding method includes obtaining an estimated signal-to-interference-plus-noise ratio (SINR) and a packet error rate (PER) of a communication link of a user terminal; setting a first adjustment amount of the SINR of the communication link according to the PER of the communication link; calculating an effective SINR of the communication link according to the estimated SINR of the communication link and the first adjustment amount of the SINR of the communication link; and determining a modulation coding scheme of the communication link according to the effective SINR of the communication link.

Description

technical field [0001] The present invention relates to wireless communication, and more specifically, to an adaptive modulation and coding method and device. Background technique [0002] In the wireless communication system, in order to improve the throughput rate of the whole system, AMC (Adaptive Modulation Coding) is widely used. Adaptive Modulation and Coding (AMC) is a technology that adaptively changes modulation and coding methods according to channel conditions. The basic working principle is: users in the center of the cell are usually assigned higher-order modulation and coding methods or coding rates to improve throughput due to better SINR, such as 64QAM and 3 / 4 code rate Turbo code. The users at the edge of the cell have lower signal-to-interference-noise ratio (SINR). In order to ensure user stability, they are assigned lower-order modulation or coding rates (such as QPSK, 1 / 2 code rate Turbo code). The use of AMC has the following advantages: (1) Users in ...

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
IPC IPC(8): H04W24/04H04L1/00
CPCH04L1/0015H04L27/3405H04L1/0009H04L1/0035H04L1/20H04L1/0026H04L1/0003
Inventor 王启军王均松汤剑斌林咏华
Owner IBM CORP
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