Spectrum Sharing Overlay System with a Repeater for the Primary Signal

Jun NAGANAWA  Kentaro KOBAYASHI  Hiraku OKADA  Masaaki KATAYAMA  

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E97-A   No.7   pp.1576-1586
Publication Date: 2014/07/01
Online ISSN: 1745-1337
Type of Manuscript: PAPER
Category: Communication Theory and Signals
Keyword: 
cognitive radio,  spectrum sharing,  overlay,  regenerative repeater,  QAM,  

Full Text: PDF(1.9MB)
>>Buy this Article


Summary: 
This paper proposes a new spectrum sharing scheme which uses one-sided collaboration. In the proposed system, the transmitter of the secondary system relays the primary signal and overlays its own data on the retransmitted primary signal. The results of the theoretical analysis show that the proposed scheme with regenerative relay allows the secondary system to communicate at the same speed as the primary system that disregards the presence of the secondary system.