Title :
Physical layer considerations for wideband cognitive radio
Author :
Goodman, Joel ; Miller, Benjamin A. ; Vian, James ; Bolstad, Andrew ; Kalyanam, Janani ; Herman, Matthew
Author_Institution :
MIT Lincoln Lab., Lexington, MA, USA
fDate :
Oct. 31 2010-Nov. 3 2010
Abstract :
Next generation cognitive radios will benefit from the capability of transmitting and receiving communications waveforms across many disjoint frequency channels spanning hundreds of megahertz of bandwidth. The information theoretic advantages of multi-channel operation for cognitive radio (CR), however, come at the expense of stringent linearity requirements on the analog transmit and receive hardware. This paper presents the quantitative advantages of multi-channel operation for next generation CR, and the advanced digital compensation algorithms to mitigate transmit and receive nonlinearities that enable broadband multi-channel operation. Laboratory measurements of the improvement in the performance of a multi-channel CR communications system operating below 2 GHz in over 500 MHz of instantaneous bandwidth are presented.
Keywords :
broadband networks; cognitive radio; information theory; next generation networks; advanced digital compensation algorithm; broadband multichannel operation; communications waveform; information theoretic advantages; next generation cognitive radio; physical layer consideration; wideband cognitive radio; Bandwidth; Computer architecture; Kernel; Nonlinear distortion; Polynomials; Radio transmitters; Receivers;
Conference_Titel :
MILITARY COMMUNICATIONS CONFERENCE, 2010 - MILCOM 2010
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4244-8178-1
DOI :
10.1109/MILCOM.2010.5680477
