Compressed Sensing Construction of Spectrum Map in Cognitive Radio Networks and Its Applications
Date Issued
2011
Date
2011
Author(s)
Shih, Sung-Yin
Abstract
Cooperative relay enables general multi-hop cognitive radio networks (CRN) over cognitive radios (CR) and nodes of primary system (PS). However, successful CR networking such as routing relies on the knowledge of radio resource availability associated with location, which is a challenge of traditional spectrum sensing. We introduce the concept of spectrum map encompassing spectrum and location information
to deterministically assist multi-hop routing in highly dynamic environment, while common routing of CRN paying attention to statistical nature of opportunistic
links. Since it is not feasible to construct the entire spectrum map as traditional spectrum sensing only knows local information of CR transmitter, we adopt the
novel compressed sensing technique to establish spectrum map based on a small number of available local sensing results. Besides directly apply Compressed Sensing theory, we theoretically analyze the communication overhead and practically construct the spectrum map via expander graph. Finally we use spectrum map to reliably route packets of CRs in an end-to-end way, under the guaranteed outage for
nodes in PS and maximizing the throughput among cooperative CRs.
Subjects
Spectrum map
Cooperative relay
Compressed Sensing
Expander graph
Routing in Cognitive Radio Networks
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-100-R98942039-1.pdf
Size
23.32 KB
Format
Adobe PDF
Checksum
(MD5):309d8aea5125384ab9f63c32c58c13b4