2007 search results - page 52 / 402 » SPECTRUM |
90
Voted
IH
2005
Springer
15 years 6 months ago
2005
Springer
This paper puts in consideration the concepts of security and robustness in watermarking, in order to be able to establish a clear frontier between them. A new information-theoreti...
102
Voted
GLOBECOM
2007
IEEE
15 years 4 months ago
2007
IEEE
We design opportunistic spectrum access strategies for improving spectrum efficiency. In each slot, a secondary user chooses a subset of channels to sense and decides whether to ac...
GLOBECOM
2009
IEEE
15 years 4 months ago
2009
IEEE
In this paper, we have investigated several aspects of multiplicative spread spectrum (MSS) embedding for Data Hiding. First, we analyze the probability of error of the maximum lik...
135
Voted
IMAMS
2003
15 years 1 months ago
2003
Watermarking is to embed a structure called a watermark into the target data such as images. The watermark can be used, for example, in order to secure the copyright and detect tam...
109
Voted
CORR
2010
Springer
15 years 20 days ago
2010
Springer
This paper considers the problem of spectrum sensing in cognitive radio networks when the primary user is using Orthogonal Frequency Division Multiplexing (OFDM). For this we devel...