Qatar University

Other

Qatar Foundation for Education, Science and Community Development

Iberdrola Qstp LLC

Ridha Hamila

Naofal Mohammed Al-Dhahir

Waheed U Bajwa

Mohamed Awadin

Omar Ellabban

Abubakr O Al-Abbasi

Devrim Unal

Ozgur Ozdemir

Ula Hijawi

Adel Gastli

IoT frameworks require flexible and scalable communication and security schemes that can be deployed on devices of low computational capabilities and memory (e.g., resource-constrained devices). A system is provided including a mesh network of resource-constrained devices creating a self-organizing and collaborative communication topology between the devices, and an attribute-based encryption security scheme integrated with the mesh network that enables the resource-constrained devices to communicate securely in unsecured channels by defining an access policy that can only be satisfied by the authorized resource-constrained devices. In order to integrate the attribute-based encryption scheme with the mesh network of resource-constrained devices, a serializer and deserializer are provided that prepare all communications to go through the attribute-based encryption scheme by converting all data and metadata into a suitable format for transmission over the network.

Mesh network for resource-constrained devices

A method and apparatus may include receiving a transmission. The method can also include determining a sparsifying dictionary that sparsely approximates a data vector of the transmission. The determining the sparsifying dictionary includes performing a fast Fourier transform and/or an inverse fast Fourier transform. The method also includes configuring a filter based on the determined sparsifying dictionary.

Method and apparatus for implementing sparse finite-impulse-response equalizers

The method of identifying faulty antenna elements in massive uniform linear antenna arrays is a compressive sensing-based method that takes advantage of the reduction of the measurement matrix for a uniform linear antenna array to a partial discrete Fourier transform (DTF) matrix, whose rows correspond to the measurements' locations. Particularly, the method of identifying faulty antenna elements in massive uniform linear antenna arrays allows the measurements to be taken to reduce the measurement matrix's worst-case coherence, a factor which affects the detection probability of the defective antenna elements. The method constructs a measurement matrix with fewer distinct inner product values to reduce the worst-case coherence. In an alternative embodiment, the method focuses on bounding the inner product between any pair of measurement matrix columns.

Method of identifying faulty antenna elements in massive uniform linear antenna arrays

Disclosed are an system and method for compensation of I/Q imbalance in a beamforming OFDM system. The system comprises: a TX beamformer configured at a transmitter end of the beamforming OFDM system; a noise whitener configured at a receiver end of the beamforming OFDM system; and a RX MMSE configured at the receiver end of the beamforming OFDM system. At least one of the TX beamformer, the noise whitener and the RX MMSE receiver, or any combination thereof are capable of jointly processing a carrier and its image subcarrier to compensate the I/Q imbalance in the beamforming system.

System and methods for compensation of I/Q imbalance in beamforming OFDM systems

Growing community of inventors

Doha, Qatar

Ridha Hamila