Todor Cooklev

A Cloud-Based Approach to Spectrum Monitoring

T housands of wireless communication systems have been fielded, with hundreds more under developm... more T housands of wireless communication systems have been fielded, with hundreds more under development. The RF spectrum has growing economic value to consumers , businesses, and governments worldwide. This has generated such a demand for wireless bandwidth that spectrum allocation, the existing primary method of spectrum management , is becoming increasingly inadequate. In this paper, we briefly summarize the response to the U.S. National Telecommunications and Information Agency's Notice of Inquiry concerning a Spectrum Monitoring Pilot Program and present a cloud-based system-of-systems for spectrum monitoring based on the response to the Inquiry. We describe the interface to the cloud as an important enabler and propose a solution that allows ontology descriptions to be used for both spectrum management and monitoring. These ontology descriptions support the use of semantic techniques such as queries, responses, and reasoning.

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Hands-On Open Access Broadband Wireless Technology Lab

by Yazan Alqudah and Todor Cooklev

psut.edu.jo

The unprecedented growth in wireless communication is offering opportunities and challenges for e... more The unprecedented growth in wireless communication is offering opportunities and challenges for educators. Thanks to technology advances and job opportunities, more and more students are interested in wireless communications courses. However, bridging the gap between classroom and real-world experience remains a challenge. Advanced undergraduate communications courses typically focus more on theory. Some courses are given online, and lack hands-on experiments. Driven by feedback from industry and students, we propose practical laboratory experiments that attempt to bridge the gap between classroom and real world. The laboratory exercises take advantage of the infrastructure of deployed wireless networks and allow students to measure, and analyze data, as well as to interact. The proposed labs can be used even in online courses. This paper describes the experiments proposed, the procedures and typical results. The experiments are tied to course objective.

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Vector transform-based OFDM

by Todor Cooklev and Pierre Siohan

2006 Fortieth Asilomar Conference on Signals, Systems and Computers, 2006

Abstract In this paper we propose a new type of a system for multicarrier modulation. The modulat... more Abstract In this paper we propose a new type of a system for multicarrier modulation. The modulation and demodulation in the proposed system are performed by an inverse and forward vector transforms. The properties of the vector transform allow fast vector transform algorithms to be derived in a manner similar to the FFT Real-valued vector transforms are also possible. Appropriate vector transforms are designed. Simulation results are presented, which show that in multipath channels compared with conventional OFDM systems the ...

An Open RF-Digital interface for software-defined radios

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Maximally flat half-band diamond-shaped FIR filters using the Bernstein polynomial

IEEE Transactions on Circuits and Systems Ii: Analog and Digital Signal Processing, 1993

Absfrucf-Two-dimensional (2-D) linear-phase diamond-shaped (DS) FIR digital filters have importan... more Absfrucf-Two-dimensional (2-D) linear-phase diamond-shaped (DS) FIR digital filters have important image processing applications. They are used in sampling structure conversion, e.g. interlace-to-progressive conversion. Maximally flat (MF) DS filters have attractive time-and frequency-domain properties and are preferred in some applications. In this correspondence MF half-band DS FIR are designed using the twovariable Bernstein polynomial. Formulas for the transfer function and the impulse response are obtained.

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Bandpass Maximally Flat FIR Filters and Hilbert Transformers

, Bandpass Maximally Flat FIR Filters and Hilbert Transformers.

A New Class of Maximally Flat Two-Dimensional FIR Digital Filters

, A New Class of Maximally Flat Two-Dimensional FIR Digital Filters.

Generalized Fermat number transforms

Special Section on Cryptography and Information Security

DYNAMIC FREQUENCY-HOPPING SYSTEM

In a frequency hopping system, the band for frequency hopping is dynamically changed in response ... more In a frequency hopping system, the band for frequency hopping is dynamically changed in response to changing channel conditions or a command. Simultaneously with the change of the band of operation the output power may be changed as well, so that the system satisfies at all times the regulatory requirements of the country it operates in.

Efficient implementation of all maximally flat FIR filters of a given order

The IEEE Standard for WLAN: IEEE 802.11

Work on the first wireless data communications standard began in 1990 when IEEE 802.11 was starte... more Work on the first wireless data communications standard began in 1990 when IEEE 802.11 was started as a working group within IEEE 802. The success of Ethernet or IEEE 802.3 and the desire to have" wireless Ethernet" was the motivation for creating IEEE 802.11 as a working group. Wireless Ethernet was originally intended to provide connectivity where wiring was inadequate to support wired LANs.(Ethernet needs special cables called CAT5.

Improved prefix for OFDM-based cognitive radios

Abstract In OFDM-based cognitive radios several carriers are left unused to enable coexistence wi... more Abstract In OFDM-based cognitive radios several carriers are left unused to enable coexistence with other wireless systems. Proposed is a prefix design technique that depends on the wireless channel and on the set of unused carriers. It is shown that in this way considerable performance improvement can be obtained.

Method for packet communication using training packets

Messages transmitted between a receiver and a transmitter are used to maximize a communication da... more Messages transmitted between a receiver and a transmitter are used to maximize a communication data rate. In particular, a multicarrier modulation system uses messages that are sent from the receiver to the transmitter to exchange one or more sets of optimized communication parameters. The transmitter then stores these communication parameters and when transmitting to that particular receiver, the transmitter utilizes the stored parameters in an effort to maximize the data rate to that receiver.

Systems and methods for high rate OFDM communications using first and second cyclic prefix lengths

Messages transmitted between a receiver and a transmitter are used to maximize a communication da... more Messages transmitted between a receiver and a transmitter are used to maximize a communication data rate. In particular, a multicarrier modulation system uses messages that are sent from the receiver to the transmitter to exchange one or more sets of optimized communication parameters. The transmitter then stores these communication parameters and when transmitting to that particular receiver, the transmitter utilizes the stored parameters in an effort to maximize the data rate to that receiver.

An improved systolic realization for complex digital filters

Multicarrier packet communication method

Messages transmitted between a receiver and a transmitter are used to maximize a communication da... more Messages transmitted between a receiver and a transmitter are used to maximize a communication data rate. In particular, a multicarrier modulation system uses messages that are sent from the receiver to the transmitter to exchange one or more sets of optimized communication parameters. The transmitter then stores these communication parameters and when transmitting to that particular receiver, the transmitter utilizes the stored parameters in an effort to maximize the data rate to that receiver.

Introduction to IEEE 802.11 Course and IEEE Standards Bundle

Abstract Introduction to IEEE 802.11 will provide an introduction covering both network and stand... more

High-speed MODEM operating over two or more telephone lines

A communication system configured to transceive a signal along multiple communication media of th... more A communication system configured to transceive a signal along multiple communication media of the communication system thereby increasing the rate at which the signal is transceived. The communication system comprising a source configured to transceive a signal. A communication apparatus configured for decomposing the signal into a plurality of manipulated signals.

Multidimensional Perfect Reconstruction Linear Phase Digital Filter Bank

, Multidimensional Perfect Reconstruction Linear Phase Digital Filter Bank.

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