Research Publications
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Journal publications
- R. Tandra, S. M. Mishra, and A. Sahai, "What is a spectrum
hole and what does it take to recognize one?", Submitted to the Proceedings of the IEEE, 2008
[PDF ]
- R. Tandra, and A. Sahai, "SNR walls for signal detection,"
in the IEEE Journal on Selected Topics in Signal
Processing, pp. 4-17, Feb 2008
[Abstract ,
PDF ]
- A. Sahai, N. Hoven, S. M. Mishra, and R. Tandra. "Fundamental tradeoffs in spectrum sensing for opportunistic frequency reuse," submitted to IEEE Journal on Selected
Areas in Communications, 2007
- Rahul Tandra, N. Hemachandra and D. Manjunath, "Join Minimum
Cost Queue: Stability and Performance," in Probability in the Engineering and Informational Sciences, vol. 18, pp. 445-472, 2004.
[Abstract ,
PDF ]
- Rahul Tandra, N. Hemachadra and D. Manjunath, "DiffServ Node
with Join Minimum Cost Queue Policy and Multiclass Traffic," in Performance Evaluation, vol. 55, pp. 69-91, 2004.
[Abstract ,
PDF ]
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Conference publications
- S. M. Mishra, R. Tandra, and A. Sahai, "The case for wideband
sensing", submitted to the Forty-Fifth annual Allerton Conference
on Communication, Control and Computing, 2007.
- R. Tandra, and A. Sahai, "SNR walls for feature detectors",
in the proceedings of the IEEE Dynamic Spectrum Access Networks, April
2007.
[Abstract ,
PDF
]
- S. M. Mishra, R. Tandra, and A. Sahai, "Coexistence with primary users of
different scales",
in the proceedings of the IEEE Dynamic Spectrum Access Networks, April
2007.
[Abstract ,
PDF
]
- R. Tandra, and A. Sahai, "Is interference like noise when you know its codebook?", in the proceedings of the IEEE International Symposium
on Information Theory, July 2006.
[Abstract ,
PDF
]
- A. Sahai, R. Tandra, S. M. Mishra, and N. Hoven "Fundamental Design Tradeoffs in
Cognitive Radio Systems", in the proceedings of the Fist International
Workshop on Technology and Policy for Accessing Spectrum, June
2006.
[Abstract ,
PDF
]
- S. Shellhammer, S. Shankar, R. Tandra, and J. Tomcik,
"Performance of Power Detector Sensors of DTV Signals in IEEE
802.22 WTANs", in the proceedings of the Fist International
Workshop on Technology and Policy for Accessing Spectrum, June
2006.
[Abstract ,
PDF
]
- A. Sahai, R. Tandra, and N. Hoven, "Opportunistic spectrum use
for sensor networks: the need for local cooperation," submitted to
the 2006 IPSN
[Abstract ,
PDF
]
- R. Tandra and A. Sahai, "Fundamental limits on detection in low
SNR under noise uncertainty," presented at WirelessCom 05
Symposium on Signal Processing, June 2005.
[Abstract ,
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]
- A. Sahai, N. Hoven, and R. Tandra, "Some fundamental limits on
cognitive radio," presented at Allerton Conference on Communication, Control, and Computing, October 2004.
[Abstract
,
PDF
]
| Technical Reports
- A. Sahai, N. Hoven, S. M. Mishra, and R. Tandra, "Fundamental
tradeoffs in robust spectrum sensing for opportunistic frequency reuse,"
Technichal report, University of California at Berkeley, Berkeley, CA,
March 2006
[Abstract ,
PDF ]
| Master's Thesis
- R. Tandra, "Fundamental limits on detection in low SNR,"
Master's thesis, University of California at Berkeley, Berkeley, CA,
2005
[Abstract ,
PDF ]
We consider the generic problem of detecting the presence or
absence of a weak signal in a noisy environment. The motivation behind
this problem is the idea of cognitive radios, where it is essential
for the secondary user to detect whether a frequency band is being
used by a known primary user. In this thesis we show that under even
weak uncertainty, robust detection becomes impossible below
a certain SNR, regardless of how many samples we take.
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