Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Demodulation method for bidirectional relay spatial shift key modulation signal

A technology for two-way relay and demodulation of signals, applied in radio relay systems, space transmit diversity, diversity/multi-antenna systems, etc. It can solve problems such as low receiver computational complexity, improve throughput, and increase user capacity. , the effect of increasing revenue and profits

Inactive Publication Date: 2014-10-01
PEKING UNIV
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this communication mode, how to best demodulate the signal and make the receiver have very low computational complexity is still an open problem in academia and industry

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
  • Demodulation method for bidirectional relay spatial shift key modulation signal
  • Demodulation method for bidirectional relay spatial shift key modulation signal
  • Demodulation method for bidirectional relay spatial shift key modulation signal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0014] figure 1 It shows the communication block diagram targeted by the present invention, and its communication process is described as follows:

[0015] Launch phase: two source nodes, S 1 and S 2 , the input bit stream is mapped to the corresponding antenna number (for example, assuming that the number of transmitting antennas is 2, bit 0 indicates that the first antenna is active, and bit 1 indicates that the second antenna is active.). Suppose S 1 The k-th antenna is activated, with energy launch 1; s 2 The qth antenna is activated, with energy Launch 1. Therefore, the received signal at the relay node R is

[0016] y R = P ...

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 provides three signal demodulation schemes for adopting spatial shift key modulation specific to source nodes and adopting an amplifying-forwarding way specific to single-antenna relay nodes in a bidirectional relay communication scene. The first scheme is maximum-likelihood demodulation. The first scheme has optimal performance, but the computation complexity increases along with the third-power speed of the number of receiving antennas. The second scheme is zero-forcing equalization. The second scheme has the worst performance, but the computation complexity is low, and each transmitting antenna is modulated independently. The third scheme is maximal ratio combination. The performance of the third scheme is approximate to the performance of maximum-likelihood demodulation, and the computation complexity is low. By using any of the three schemes, bidirectional relay communication can be supported.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a signal demodulation method in which a transmitting end adopts spatial keying modulation and a single antenna of a relay node is amplified and forwarded in a two-way relay communication scenario. Background technique [0002] Spatial keying (SSK) modulation is a novel multiple-input multiple-output (MIMO) technique. In SSK modulation, only one transmit antenna is activated at each moment, and the spatial position (or antenna number) of the activated antenna carries transmit information. Therefore, compared with the traditional MIMO technology, V-BLAST and SSK modulation can completely avoid the signal synchronization and interference problems between transmitting antennas and greatly reduce the complexity of the receiver. It has been proved that, for a certain number of transmitting antennas, SSK modulation can achieve a smaller bit error probability (BER) under th...

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): H04B7/06H04B7/14
Inventor 程翔温淼文焦秉立
Owner PEKING UNIV
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
Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com