43 search results - page 8 / 9 » Spectral Efficiency of Cognitive Radio Systems |
MOBICOM
2009
ACM
13 years 11 months ago
2009
ACM
In November 2008, the FCC ruled that the digital TV whitespaces be used for unlicensed access. This is an exciting development because DTV whitespaces are in the low frequency ran...
CORR
2006
Springer
13 years 5 months ago
2006
Springer
This paper deals with orthogonal Space-Time Block Coded MC-CDMA systems, in outdoor realistic downlink scenarios with up to two transmit and receive antennas. Assuming no channel s...
TWC
2008
13 years 5 months ago
2008
Abstract--Wireless infrastructures can be conveniently categorized into two types: those that provide point-to-point `unicast' connectivity (e.g., cellular) and others that ar...
CORR
2011
Springer
13 years 5 days ago
2011
Springer
The Random Demodulator (RD) and the Modulated Wideband Converter (MWC) are two recently proposed compressed sensing (CS) techniques for the acquisition of continuous-time spectral...
JCM
2006
13 years 5 months ago
2006
- Current wireless systems are called vendor-central systems because, users should subscribe to a service provider (vendor) and receive the service through the spectrum assigned to...