Abdel-Hamid Soliman

Subspace Compressive GLRT Detector for MIMO Radar in the Presence of Clutter.

The problem of optimising the target detection performance of MIMO radar in the presence of clutter is considered. The increased false alarm rate which is a consequence of the presence of clutter returns is known to seriously degrade the target detection performance of the radar target detector, especially under low SNR conditions. In this paper, a mathematical model is proposed to optimise the target detection performance of a MIMO radar detector in the presence of clutter. The number of samples that are required to be processed by a radar target detector regulates the amount of processing burden while achieving a given detection reliability. While Subspace Compressive GLRT (SSC-GLRT) detector is known to give optimised radar target detection performance with reduced computational complexity, it however suffers a significant deterioration in target detection performance in the presence of clutter. In this paper we provide evidence that the proposed mathematical model for SSC-GLRT detector outperforms the existing detectors in the presence of clutter. The performance analysis of the existing detectors and the proposed SSC-GLRT detector for MIMO radar in the presence of clutter are provided in this paper.

Resource allocation technique for downlink beamformed cognitive radio network

One of the major challenges in cognitive radio network (CRN) is optimum allocation of resources to the secondary user (SU) without affecting quality of service (QoS) of the primary user (PU) as agreed with their network provider. Outage probability of the both PU and SU as well as the link reliability is the most important concern in such allocation. In this paper, three different types of resource allocation scheme are proposed; namely static, quasi-static and dynamic according to the nature of their adaptation approach with the available resources. In the analysis, a beam-formed Multi input multi output multiuser system has been assumed. It is observed that the respective allocation schemes mentioned above comply with the requirement of underlay, overlay and inter-weave type of co-existence of PU and SU. From the analysis it is found that although dynamic allocation scheme provides with lower outage probability; followed by quasi-static and static, in term of processing complexity and delay the performance sequence in reverse order.