Unlock instant, AI-driven research and patent intelligence for your innovation.

Detecting method for continuous gradient search vertical bell labs layered space-time code based on power constraint

A technology of power constraint and gradient search, applied in the field of communication, to simplify the design cost, improve the efficiency, and reduce the robustness and complexity of the system

Inactive Publication Date: 2012-10-03
XIDIAN UNIV
View PDF2 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Calculate the power constraint value

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
  • Detecting method for continuous gradient search vertical bell labs layered space-time code based on power constraint
  • Detecting method for continuous gradient search vertical bell labs layered space-time code based on power constraint
  • Detecting method for continuous gradient search vertical bell labs layered space-time code based on power constraint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] The present invention is realized by relying on the following system. The number of transmitting antennas and the number of receiving antennas are both 4, and the modulation mode is a MIMO system of QPSK modulation. At the transmitting end, the information sequence is encoded by the vertical layered space-time code V-BLAST, and the serial data stream is converted into a parallel data stream, and then the parallel data streams are modulated separately and sent out. At the receiving end, the received signal is y, expressed as y=hx+w, where y is the received signal, h is a channel matrix with independent elements that obey the complex Gaussian distribution, x is the transmitted information sequence, and w is the Gaussian white noise vector .

[0037] Attached below figure 1 The present invention is further described in detail.

[0038] Step 1, receive the signal. The communication receiving end receives the detection signal and channel information sent by the transmitt...

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 a detecting method for continuous gradient search vertical bell labs layered space-time code based on power constraint. The method comprises the following steps: (1) setting up initial value signals; (2) setting up initial thresholds; (3) setting up the value which is three times higher than the sent signal power as a power constraint value; (4) performing singular value decomposition in the channel matrix; (5) obtaining a Lagrange function; (6) employing a Newton iteration method to iterate the Lagrange function to obtain the iterated decoded signals; (7) judging whether the signals meet a condition of convergence, if yes, going to the step (8), otherwise, going to the step (6); (8) performing hard decision on the iterated decoded signals obtained in the step (6) to obtain the detection signals. Compared with the prior art, the detecting method has the following advantages that the method is better than linear ZF (zero forcing) in detecting performance and close to MMSE (minimum mean square) in detecting performance; the detecting method is lower than the linear MMSE detecting method in complexity; and the detecting method is better than the linear MMSE detecting method in robustness.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a power constraint-based continuous gradient search vertical layered space-time code detection method in the technical field of space-time signal detection. The invention can be used to detect vertically layered space-time codes in a multiple input multiple output (Multiple Input Multiple Output, MIMO) system. Background technique [0002] Using multiple-input multiple-output MIMO systems in wireless channels can significantly increase communication capacity. Vertical Bell Labs layered Space-Time (VBLAST) is a typical application of the MIMO space multiplexing technology. [0003] Existing MIMO detection algorithms are mainly divided into two categories: nonlinear detection algorithms and linear detection algorithms. Nonlinear detection algorithms mainly include maximum likelihood (Maximum Likelihood, ML), spherical detection, tree search and maximum likelihood sear...

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): H04L1/06H04L25/03
Inventor 卢小峰张海林张亮周洋韩金张立
Owner XIDIAN UNIV
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