1 / 10

Cooperative Wireless Communication and Networked Methods for Spectrum Sharing and Interference

Cooperative Wireless Communication and Networked Methods for Spectrum Sharing and Interference 14 – 17 November 2011. Presented by Dr . Wei Chen, Professor Cornel Zlibut , Undergraduate Junior Tennessee State University. Problem Statement .

gina
Download Presentation

Cooperative Wireless Communication and Networked Methods for Spectrum Sharing and Interference

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Cooperative Wireless Communication and Networked Methods for Spectrum Sharing and Interference 14 – 17 November 2011 Presented by Dr. Wei Chen, Professor Cornel Zlibut, Undergraduate Junior Tennessee State University

  2. Problem Statement Study the benefits that the cooperation brings to cognitive radio networks. Focus on the cooperative MIMO technology, where multiple distributed secondary users cooperate on data transmission and reception. Goal: Design of novel cooperative paradigms that can significantly improve the performance of both overlay and underlay systems in cognitive radio networks.

  3. Approach 1. Cooperative Relay in Overlay System Multiple secondary users help primary users’ data transmission (in order to use the primary users channel) 2. Cooperative Transmission in Underlay Systems Multiple secondary users cooperate on data transmission (in order to reduce the energy level without disturbing the primary users transmission) Primary users PT PR PR PT Primary users CT CR Secondary users Secondary users Approach: Use MIMO technology and optimize the parameters in the cooperative relay/transmission

  4. Approach - continue 3. Cooperatively limit the interference towards primary users. Prx2 Ptx2 Ptx1 Prx1 Stx2 Null constraints Null constraints Srx1 Stx1 Null constraint Srx2 Ptx: primary Tx Prx: primary Rx Stx: secondary Tx Srx: secondary Rx

  5. Evaluation and Results Evaluation Numerical analysis Energy model: (2) Experiment on Universal prototype testbed

  6. Evaluation and Results - continue 1. Cooperative Relay in Overlay System Multiple secondary users help primary users’ data transmission (in order to use the primary users channel) Primary users PT PR Secondary users

  7. Evaluation and Results - continue 2. Cooperative Transmission in Underlay Systems Multiple secondary users cooperate on data transmission (in order to reduce the energy level without disturbing the primary users transmission) PR PT Primary users CT CR Secondary users

  8. Experiment and Results • Hardware and Software Architecture • Hardware: Universal Software Radio Peripheral + RFX 2400 daughter board • Software: GNUradio • Relay Strategy: Decode and Forward • Programming Strategy • Python codes for data transmission and receiving • Visual programming for signal combination and performance evaluation R Signal Combination S D

  9. One relay node scheme • Two-phase implementation • Hardware setup • Results:

  10. Two-relay nodes scheme (in progress) • Implementation approach Signal Combination D R1 Signal Combination S D D D R1 R1 R1 R1 R1 R2 R2 R2 R2

More Related