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Adaptive Usage of Main Resources in MIMO-Cognitive Radio Networks

Adaptive Usage of Main Resources in MIMO-Cognitive Radio Networks. Shalva Kvirkvelia (PHD student) Prof. Teimuraz Kortua Prof. Jemal Beridze. GEORGIA. Tbilisi. Georgian Technical University Department of Telecommunication. MIMO system.

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Adaptive Usage of Main Resources in MIMO-Cognitive Radio Networks

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  1. Adaptive Usage of Main Resources in MIMO-Cognitive Radio Networks Shalva Kvirkvelia (PHD student) Prof. TeimurazKortua Prof. JemalBeridze

  2. GEORGIA

  3. Tbilisi

  4. Georgian Technical UniversityDepartment of Telecommunication

  5. MIMO system

  6. Linear Capacity Growth Theoretical The MIMO Systems capacity grows linearly with the number of antennas. 2x2 MIMO doubles the capacity and 4x4 MIMO quadruples capacity. The linearity occurs only when we have ideal channel conditions, there is no interference among subcarriers, channels are orthogonal and there is no correlation between the channels.

  7. Cognitive radio

  8. The four major functions of a cognitive network are • Spectrum sensing: detection of unused frequency ranges • Spectrum management: selection of the unused frequency range that best fulfills the requirements • Spectrum mobility: possibility to switch frequencies without data loss and additional delay (e.g. by detecting a band with less interference) • Spectrum sharing: intelligent, multiple access to a spectrum within a network

  9. Cognitive-MIMO • cognitive radio network • data on the MIMO channel • resources-adaptive algorithms • optimal transmission circuit

  10. Multipath propagation

  11. Inter symbol interference

  12. Cyclic prefix

  13. Rate loss

  14. Resource loss

  15. Multipath estimating tool

  16. Example

  17. IEEE 802.16-2004 OFDM PHY link, Including Space-Time Block Coding

  18. Results

  19. Adaptive MIMO System with OSTBC

  20. Results

  21. Downlink Transport Channel (DL-SCH) Processing

  22. Results

  23. LTE Transmit Diversity Example

  24. Results

  25. Thank you Questions?

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