Uplink non-orthogonal multiple access method based on power and code word joint domain

A non-orthogonal multiple access and access method technology, applied in the field of uplink non-orthogonal multiple access, can solve the problems that the measurement end cannot correctly identify sparse blocks, it is difficult to adapt to the communication scene, and it cannot complete signal recovery, etc., to achieve improved Effects of overload ratio, increased degrees of freedom, and reduced computational load

Active Publication Date: 2017-11-07
UNIV OF SCI & TECH OF CHINA
View PDF4 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Taking the block orthogonal matching pursuit (BOMP) iterative recovery algorithm as an example, BOMP needs to select the most likely non-zero signal block position through correlation calculation and comparison in each iteration step, and then perform signal update and The residual signal is updated. When the number of sparse blocks is large, the interference between blocks will make the measurement end unabl

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
  • Uplink non-orthogonal multiple access method based on power and code word joint domain
  • Uplink non-orthogonal multiple access method based on power and code word joint domain
  • Uplink non-orthogonal multiple access method based on power and code word joint domain

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0037] In this embodiment, it includes but is not limited to a small data packet access scenario in communication. The uplink non-orthogonal multiple access method in the joint power and codeword domain considered in this embodiment includes the following processes: precoding of active users at the transmitting end, determining the power factor based on the amplitude of the channel response; and orthogonal matching tracking identification at the receiving end Active users, perform serial interference cancellation. Specifically, an uplink non-orthogonal multiple access method based on the combined power and codeword domain, such as figure 1 with figure 2 As shown, proceed as follows:

[0038] Step 1. Suppose there are N online users simultaneously sending d×1 dimensional original signals to a base station with M receiving antennas, and a block sparse signal is composed of N original signals, denoted as Where s n Represents the original signal sent by the nth online user, and T ...

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 uplink non-orthogonal multiple access method based on a power and code word joint domain. The uplink non-orthogonal multiple access method is characterized by comprising the following steps: 1, allocating different pre-coding matrixes to users; 2, making the users determine transmission power according to amplitude information of own channel responses; and 3, performing user detection and signal recovery by using an iteration algorithm, and performing successive interference cancellation in an iteration process. Specific to the problem of sparse signal reconstruction of large-scale user access, the user overload rate can be increased extremely by the uplink non-orthogonal multiple access method without central scheduling of a base station.

Description

technical field [0001] The invention belongs to the field of communication, and specifically relates to an uplink non-orthogonal multiple access method based on the combined domain of power and code words. Background technique [0002] Compressed sensing technology has been widely used in image and video signal processing, communication signal processing and other fields. Compressed sensing theory shows that when the signal vector is sparse, that is, many elements are zero, and the sampling frequency is lower than the Nyquist sampling frequency, the signal acquisition end or receiver can also reconstruct the original signal. Block sparse signals widely exist in practical applications, such as multi-band signals, sparse channel gain vectors, radar pulse signals, small data packet access, etc. A block-sparse signal means that when a signal sequence is divided into blocks, only some of the signal blocks are non-zero. Existing studies have shown that the introduction of compre...

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): H04B7/0456H04J11/00H04L1/00H04W72/04
CPCH04B7/0456H04J11/0026H04L1/0009H04L1/005H04L1/0061H04W72/0473
Inventor 宋强谢榕贵尹华锐王卫东
Owner UNIV OF SCI & TECH OF CHINA
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