Multidimensional constellations for coded transmission

A constellation diagram and multi-dimensional technology, applied to the separation device of the transmission path, transmission system, digital transmission system, etc., can solve the problems that the subcarriers are prone to errors, the codewords have no small diversity, and the average error rate will not be improved.

Inactive Publication Date: 2011-02-23
QUALCOMM INC
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technique may not improve the average error rate, and the technique leaves some codewords with little or no minor diversity, which is prone to errors when subcarrier fading occurs

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
  • Multidimensional constellations for coded transmission
  • Multidimensional constellations for coded transmission
  • Multidimensional constellations for coded transmission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] The following description describes and illustrates one or more specific embodiments with reference to the accompanying drawings and the detailed description incorporated in the accompanying drawings. These embodiments are shown and described in sufficient detail to enable those skilled in the art to practice what is claimed, where these embodiments are presented by way of illustration and teaching only and not limitation. Therefore, for the sake of brevity, certain information that is known to those skilled in the art is omitted herein.

[0030] The word "exemplary" is used herein to mean "serving as an example, instance, or instance." Any feature, embodiment or variation described herein as "exemplary" is not to be construed as preferred or advantageous over other features, embodiments or variations. All embodiments and variations described herein are exemplary embodiments and variations provided to enable those skilled in the art to make and use the invention and no...

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

Techniques for rotating and transmitting multidimensional constellations are disclosed. A method for rotating a multidimensional constellation may include constructing a first rotation matrix, constructing a second rotation matrix, applying orthogonality constraints to the first and second rotation matrices; selecting an optimizing rotation matrix from the first and second rotation matrices; and rotating the multidimensional constellation using the optimizing rotation matrix. Constructing the first rotation matrix and second rotation matrices may include constructing a first column that includes first matrix elements based on the number of axes in the multidimensional constellation, and additional columns that include permutations of the first matrix elements.

Description

[0001] related application [0002] This patent application claims priority to Provisional Application No. 61 / 041,131, filed March 31, 2008, entitled "Multi-dimensional Constellations for Coded Transmission in Fading Channels," assigned to the assignee of this application, and approved by Reference is hereby expressly incorporated in its entirety. technical field [0003] The present invention relates generally to wireless communications and, more particularly, to techniques for rotating and transmitting multi-dimensional constellations in wireless communications systems. Background technique [0004] In high data rate Orthogonal Frequency Division Multiplexing (OFDM) systems, such as but not limited to WiMedia Ultra Wideband (UWB), channel diversity is a major concern. In such a system, the associated codewords may span multiple subcarriers. The distance between the first codeword and the second related codeword may not span enough subcarriers to maintain efficient commun...

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 Applications(China)
IPC IPC(8): H04L1/00
CPCH04L5/0007H04L1/0058H04L1/0041H04L5/0044H04L5/006H04L1/0071H04L1/02H04L27/26
Inventor R·克拉比O·杜拉尔
Owner QUALCOMM INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap