Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Overlapping multiplexing transmission method, base station and user terminal

A technology of a user terminal and a transmission method, applied in the field of overlapping multiplexing transmission between base stations and user terminals, can solve the problems of unreliable data transmission, difficulty in ensuring the reliability and validity of data transmission, and achieve the effect of optimal transmission efficiency

Active Publication Date: 2009-05-13
CHINA MOBILE COMM GRP CO LTD
View PDF0 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the above analysis, for the OVxDM transmission system, if a fixed number of overlaps and a constraint length of overlapping codes are used, the performance of service data transmission varies greatly with the distance between the user terminal and the base station. When the user terminal is close to the base station, the link performance Well, the data transmission is reliable, but when it is far away from the base station, the data transmission is very unreliable, and it is difficult to guarantee the reliability and effectiveness of data transmission

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
  • Overlapping multiplexing transmission method, base station and user terminal
  • Overlapping multiplexing transmission method, base station and user terminal
  • Overlapping multiplexing transmission method, base station and user terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Embodiment 1: OVxDM coded transmission is performed once on the modulation symbols.

[0050] see Figure 4 , is a flow chart of specific implementation steps in Embodiment 1 of the present invention, including:

[0051] Step S101 , designing several combinations (L, K) of overlapping coding constraint length L and overlapping times K. Preferably, the link performance of overlapping codes corresponding to various designed combinations can change evenly with the change of SNR.

[0052] In this step S101, the value of the overlapping encoding constraint length L is generally a positive integer not greater than 10, and the value of the number of overlapping K is generally a positive integer not greater than 5. In this way, there are many combinations of L and K, and among all possible combinations of L and K, several combinations of L and K need to be determined as preset combinations of L and K. In order to make the designed combinations of several L and K meet the need...

Embodiment 2

[0093] Embodiment 2: The second iterative OVxDM coded transmission is performed on the modulation symbols, or more than two iterative OVxDM coded transmissions are performed.

[0094] see Figure 8 , which is a flowchart of specific implementation steps in Embodiment 2 of the present invention, including:

[0095] Step S201, designing several iterative combinations (more than or equal to two types), the iterative combinations include overlapping code constraint lengths and overlapping times respectively corresponding to two or more iterative overlapping multiplexing codes. Preferably, the link performance of concatenated overlapping codes corresponding to various iterative combinations designed can change evenly with the change of SNR.

[0096] For example, design four quadratic iterative combinations as:

[0097] The first iterative combination: (L1, K1; L2, K2), in the first iterative combination, it means that the modulation symbols are subjected to the first-level overlapp...

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 discloses an overlapping multiplex transmission method, a base station and a user terminal. The method comprises the following steps: the quality of an up link and / or a down link between the base station and the user terminal is acquired; a combination or an iteration combination of L and K of the up link and / or the down link meeting the requirement of service data transmission quality can be selected from predetermined more than one combinations or iterations of overlapping encoding constraint lengths L and overlapping frequencies K of overlapping complex codes for the user terminal according to link quality; service data interacted between the base station and the user terminal is transmitted after the service data is subject to overlapping complex coding by the selected combination or iteration combination of the L and the K. With the invention, the reliability of data transmission can effectively ensured, and the efficiency of system transmission can further improved.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to an overlapping multiplexing transmission (OVxDM) method, and a base station and a user terminal with the overlapping multiplexing transmission function. Background technique [0002] The overlapping multiplexing transmission technology performs overlapping transmission of multiple parallel low-order modulation signals in the time domain, frequency domain, or code domain. Such as figure 1 Shown is a schematic diagram of OVTDM, the transmit symbol period is T s , in order to improve the signaling rate, the transmitted symbol interval is forcibly reduced to T s / K. According to the basic linear superposition principle of linear systems, such symbol superposition will not expand the signal bandwidth. Therefore, the spectral efficiency of the system is improved by K times. That is, by artificially manufacturing overlapping interference between symbols, high-efficiency data t...

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): H04L1/06H04B1/707H04W88/08H04W88/02H04L1/00
Inventor 刘光毅韩璐黄宇红
Owner CHINA MOBILE COMM GRP CO LTD
Features
  • Generate Ideas
  • 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