Limits on Cognitive Communications in the Wide-band Regime

Chulhan Lee; Tie Liu; Ozgur Oyman; Sriram Vishwanath

3rd International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications

Research Article

Limits on Cognitive Communications in the Wide-band Regime

Cite: BibTeX Plain Text

@INPROCEEDINGS{10.1109/CROWNCOM.2008.4562471,
    author={Chulhan Lee and Tie Liu and Ozgur Oyman and Sriram Vishwanath},
    title={Limits on Cognitive Communications in the Wide-band Regime},
    proceedings={3rd International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications},
    publisher={IEEE},
    proceedings_a={CROWNCOM},
    year={2008},
    month={7},
    keywords={Cognitive radios wide-band transmission pulse-position modulation opportunistic signaling},
    doi={10.1109/CROWNCOM.2008.4562471}
}

Chulhan Lee
Tie Liu
Ozgur Oyman
Sriram Vishwanath
Year: 2008
Limits on Cognitive Communications in the Wide-band Regime
CROWNCOM
IEEE
DOI: 10.1109/CROWNCOM.2008.4562471

Chulhan Lee¹^,*, Tie Liu²^,*, Ozgur Oyman³^,*, Sriram Vishwanath¹^,*

1: ECE Department The University of Texas at Austin Austin, TX 78712
2: ECE Department Texas A&M University College Station, TX 77845
3: Corporate Technology Intel Corporation Santa Clara, CA 95054

*Contact email: chlee@ece.utexas.edu, tieliu@ece.tamu.edu, ozgur.oyman@intel.com, sriram@ece.utexas.edu

Abstract

This paper studies cognitive communication, where a cognitive transmit-receive pair utilizes an existing (occupied) wide-band spectrum for communication. The cognitive transmitter is assumed to have perfect knowledge on the signal levels of all the legitimate transmitters in the system and must cause negligible interference at all legitimate receivers. The goal of this research is to determine fundamental limits on communication in this setting. In particular, it is shown that communication with a minimum energy per bit arbitrarily close to that of a wide-band interference-free additive white Gaussian noise channel is possible using a pulse-position modulation scheme for the cognitive user in the wide-band limit.

Keywords: Cognitive radios wide-band transmission pulse-position modulation opportunistic signaling

Published: 2008-07-15
Publisher: IEEE
Modified: 2010-05-16

: http://dx.doi.org/10.1109/CROWNCOM.2008.4562471