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Spectrum Sharing Overlay System with a Repeater for the Primary Signal
Jun NAGANAWA Kentaro KOBAYASHI Hiraku OKADA Masaaki KATAYAMA
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2014/07/01
Online ISSN: 1745-1337
Type of Manuscript: PAPER
Category: Communication Theory and Signals
cognitive radio, spectrum sharing, overlay, regenerative repeater, QAM,
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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.