Combined signal processing method for source end and relay end in bidirectional relay system

A technology of two-way relay and processing method, which is applied in the joint signal processing field of the source end and the relay end in the two-way relay system, and can solve problems such as mean square error, bit error rate, system performance loss, etc.

Inactive Publication Date: 2012-07-11
SHANGHAI JIAO TONG UNIV
View PDF3 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] After retrieval, it was also found that Rui Wang Meixia Tao, "Joint Source and Relay Precoding Designs for MIMO Two-wWay Relay Systems," IEEE ICC, 2011 ("Joint Source and Relay Precoding Designs in MIMO Two-Way Relay Systems", IEEE International Communication Conference, 2011), this article jointly designs the signal processing of the source a

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
  • Combined signal processing method for source end and relay end in bidirectional relay system
  • Combined signal processing method for source end and relay end in bidirectional relay system
  • Combined signal processing method for source end and relay end in bidirectional relay system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0077] Below in conjunction with accompanying drawing, the method of the present invention is further described: present embodiment is carried out under the premise of technical solution of the present invention, has provided detailed embodiment and concrete operation process, but protection scope of the present invention is not limited to following Example.

[0078] In this embodiment, the number of antennas M of the source end 1 and the source end 2 1 = 4, M 2 =4, the number of relay antennas is N=4, the symbols to be transmitted to each other are randomly generated QPSK modulation symbols, the backward and forward channels are Rayleigh (Rayleigh) flat fading, and the receiving noises of the relay and the two receiving ends are equal is complex white Gaussian noise with zero mean and unit variance, The signal-to-noise ratio of the backward channel is and The signal-to-noise ratio of the forward channel is and SNR 1 = SNR 2 = SNR r =8□20dB, the transmit power of s...

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

A combined signal processing method for a source end and a relay end in a bidirectional relay system comprises the following steps: the source end emits a training sequence to a relay, and the relay performs backward channel estimation to obtain an estimation channel between the source end and the relay; the relay emits a training sequence to the source end, and the source end performs forward channel estimation to obtain an estimation channel between the relay and a user; the source end feed forward channel information back to the relay, the relay performs iterative computation to source end nonlinear pre-coding matrixes, relay linear pre-coding matrixes and source end receiving equalization matrixes; the relay feeds the information of the source end back to the source end; emitting signals are subjected to nonlinear pre-treatment through the source end and then emitted to the relay; the signals received by the relay are subjected to linear pre-treatment through the relay and then broadcasted to the source end; and the source end detects the received signals to obtain information required to be transmitted therebetween. According to the invention, the bidirectional relay information transmission mode is adopted to improve the channel capacity, and the nonlinear signal processing method is adopted at the source end, so that the bit error rate performance of the system is improved.

Description

technical field [0001] The invention relates to a method in the field of wireless communication, in particular to a joint signal processing method of a source end and a relay end in a two-way relay system. Background technique [0002] The relay technology in the mobile communication system can effectively expand the coverage of the network and improve the system capacity. Long Term Evolution-Advanced) standard adopted. At present, the relay methods mainly include DF (Decode-and-Forward, decoding and forwarding), AF (Amplify-and-Forward, amplification and forwarding), etc. Among them, the AF method has been widely used because of its simple implementation and low complexity. The traditional relay system needs 4 time slots to realize the mutual transmission of information between two users. However, the two-way relay system only needs 2 time slots to realize the mutual transmission of information between two users. Therefore, the system capacity can be doubled by using the...

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): H04L1/00H04L1/06H04L25/02
Inventor 钱成张萌黄剑罗汉文俞晖
Owner SHANGHAI JIAO TONG 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
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