Research Article
Interference-free overlay cognitive radio network based on cooperative space time coding
@INPROCEEDINGS{10.4108/ICST.CROWNCOM2010.9217, author={Vivek Ashok Bohara and See Ho Ting and Yang Han and Ashish Pandharipande}, title={Interference-free overlay cognitive radio network based on cooperative space time coding}, proceedings={5th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications}, publisher={IEEE}, proceedings_a={CROWNCOM}, year={2010}, month={9}, keywords={Spectrum sharing cooperative decode-and-forward STBC outage probability}, doi={10.4108/ICST.CROWNCOM2010.9217} }- Vivek Ashok Bohara
See Ho Ting
Yang Han
Ashish Pandharipande
Year: 2010
Interference-free overlay cognitive radio network based on cooperative space time coding
CROWNCOM
IEEE
DOI: 10.4108/ICST.CROWNCOM2010.9217
Abstract
In this paper, we propose a two-phase overlay spectrum sharing protocol based on cooperative decode-and-forward relaying which allows the secondary system to gain spectrum access along with the primary system. In the proposed scheme, the secondary system operates simultaneously in the same frequency band as the primary system, which supports the relaying functionality. We show that by using a space time block code (STBC) design in two time phases in the secondary system, the subsequent interference from the secondary system to the primary system and vice versa can be completely removed. Consequently, it is possible to achieve spectrum access for secondary system without compromising on the performance of the primary system. Performance of the primary system and the secondary system is analyzed in terms of outage probability, and simulation results are shown to validate the efficiency of the proposed scheme.