• Corpus ID: 149567901

Wireless Communications and Spectrum Characterization in Impaired Channel Environments

@inproceedings{Pagadarai2012WirelessCA,
  title={Wireless Communications and Spectrum Characterization in Impaired Channel Environments},
  author={Srikanth Pagadarai},
  year={2012}
}
The demand for sophisticated wireless applications capable of conveying information content represented in various forms such as voice, data, audio and video is ever increasing. In order to support such applications, either additional wireless spectrum is needed or advanced signal processing techniques must be employed by the next-generation wireless communication systems. An immediate observation that can be made regarding the first option is that radio frequency spectrum is a limited natural… 
1 Citations

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References

SHOWING 1-10 OF 132 REFERENCES

Spectrally agile multicarrier waveforms for opportunistic wireless access

TLDR
Several multicarrier transmission solutions designed for efficiently achieving opportunistic wireless access are presented and two types of spectrally-agile multicarrier modulation schemes are investigated, namely, non-contiguous orthogonal frequency-division multiplexing and non- Contiguous nonorthogonal Frequency Division Multiplexing.

Spectrum Surveying for Dynamic Spectrum Access Networks

TLDR
The proposed spectrum survey framework has been implemented and used to examine how non-ideal transmission properties of television broadcasts can potentially impair the performance of secondary transmissions and has also been incorporated into a novel wideband spectrum sensing architecture.

On non-contiguous multicarrier waveforms for spectrally opportunistic cognitive radio systems

TLDR
Two approaches for enabling non-contiguous multicarrier modulation that can be used to facilitate spectrally opportunistic cognitive radio systems are investigated.

An adaptive spectrum sensing architecture for dynamic spectrum access networks

TLDR
An adaptive spectrum sensing framework that varies its parameters according to the characteristics of the spectrum of interest is presented, and a dynamic scheduling algorithm for spectrum sensing that can be implemented in both a conservative and non-conservative manner is proposed.

Spectrum Sensing for Dynamic Spectrum Access of TV Bands

TLDR
A set of integrated medium access control (MAC) and physical layer (PHY) spectrum sensing techniques that provide reliable access to television (TV) bands and a two-stage spectrum sensing that guarantees timely detection of incumbents while meeting the quality of service (QoS) requirements of secondary users are proposed.

Non-contiguous multicarrier waveforms in practical opportunistic wireless systems

TLDR
Two approaches are investigated for enabling non-contiguous multicarrier modulation that can be used to facilitate spectrally opportunistic cognitive radio systems via the non- Contiguous access of wireless spectrum.

Closed-Form Analysis of Spectrum Characteristics for Cognitive Radio Performance Analysis

  • P. Marshall
  • Business
    2008 3rd IEEE Symposium on New Frontiers in Dynamic Spectrum Access Networks
  • 2008
TLDR
An analysis and characterization of the spectrum environment in which a cognitive radio will operate is provided, and closed-form probability distributions are developed for fixed bandwidth signaling channels, and for proportional bandwidths, such as preselectors and low noise amplifiers.

A sub-optimal sidelobe suppression technique for OFDM-based cognitive radios

Orthogonal frequency division multiplexing (OFDM) is a transceiver technology capable of achieving spectrally efficient, high data rate wireless transmissions. Being also capable of transmitting in a

Physical layer design issues unique to cognitive radio systems

  • D. CabricR. Brodersen
  • Computer Science
    2005 IEEE 16th International Symposium on Personal, Indoor and Mobile Radio Communications
  • 2005
TLDR
This paper addresses design issues involved in an implementation of cognitive radio functions that could limit their performance or even make them infeasible and introduces algorithms and techniques whose implementation could meet these challenging requirements.

Capability of the FCC mobile monitoring van

TLDR
One technique which is being applied to the overall problem is the mobile spectrum monitoring van designed to measure occupancy, transmission, and other parameters of the land mobile channels.
...