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البحث (1):

عنوان البحث:

Switched phased-array Transmission Architecture for Secure Millimeter-Wave Wireless Communication

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تاريخ النشر:

19/01/2016

موجز عن البحث:

In this paper, we propose a new wireless communication transmission architecture called Switched phasedarray (SPA), to enhance physical layer security. SPA works as a platform for three different transmission techniques: (1) conventional phased-array transmission, (2) Antenna Subset transmission (AST) technique, and (3) Silent Antenna Hopping (SAH) transmission technique. SPA consists of a conventional phased-array transmitter followed by antennas with an on-off switching circuit. The proposed solution maintains the objective of scrambling the constellation points in both amplitude and phase in undesired directions, while preserving a clear constellation in the target direction. The proposed solution – SPA – is different from previously-used methods in the following ways: (1) SPA is not restricted to the use of phase modulation, and can accept any modulation type including QAM, (2) it does not need to modulate the signal in the Radio Frequency (RF) domain, where the conventional phased-array transmitter circuits remain unchanged, (3) in the far field, SPA scrambles the signal constellation by randomly switching-off some of the transmitting antennas (AST), or only one of them (SAH), (4) SPA can be easily integrated with the current infrastructure of phased-array transmitters, (5) SPA breaks up the correlation between the data rates and the switching speed, and (6) SPA performs a variety of DM transmission techniques. We present the potential transmission techniques including PA, AST, and SAH.We analyze the performance for all cases and derive an exact expression of the bit error probability, and we analyze the secrecy capacity. The results show that SPA, and its variants AST and SAH, are simple and very efficient solutions to improve the physical layer security of mm-wave communication.

المؤتمرات العلمية:

المؤتمر (1):

عنوان المؤتمر:

7^th  Saudi Students Conference

تاريخ الإنعقاد:

01/02/2014

مكان الإنعقاد:

Edinburgh, United Kingdom

طبيعة المشاركة:

Paper presentation

عنوان المشاركة:

Cognitive Radio Technology Challenges

ملخص المشاركة:

Cognitive radio technology promises to be a solution to the shortage and misuse of frequency spectrum. As a result the previous decade has witnessed a significant amount of research and the principle of artificial intelligence has been expanded to cover the whole network and its components rather than the radio devices. Sensing the primary user and distinguishing it from the white noise and other secondary users are the main problems that the research attempts to tackle, in addition to trying to find commercial applications to help cognitive radio technology to flourish. Finally, the expected effects of this technology on the future of telecommunications field are amazing, because the efficiency of the network will be improved dramatically, which means more wireless services with higher speeds and wider storage capacity as well as increasing the reliability and stability of the wide area networks.

المؤتمر (2):

عنوان المؤتمر:

8^th Saudi Students Conference

تاريخ الإنعقاد:

01/02/2015

مكان الإنعقاد:

London, UK

طبيعة المشاركة:

Paper presentation

عنوان المشاركة:

The Performance Analysis of Space Shift Keying Modulation Using Three different Methods

ملخص المشاركة:

Spatial Modulation (SM) has recently received much attention since it can achieve a spatial multiplexing gain while avoiding the conventional Multi-input-multi-output (MIMO) limitations such as inter-channel interference (ICI), inter-antenna synchronization (IAS) and multiple radio frequency (RF) chains. The space shift keying (SSK) is a special case of SM. In SSK, only the antenna indices are used to convey the information. Therefore, the complexity of the receiver is reduced compared to the conventional SM which leads to reduce the cost of transceiver. The main contributions in this paper are: 1) we propose three different methods in order to analyse the performance of the space shift keying modulation, 2) the numerical calculations are used to validate that all the three methods leads to the same results, and 3) we prove that the simulation results agree with the theoretical analysis. The significant reduction in complexity, without affecting the SM performance gain, suggests SSK as a viable solution for the next generation of wireless communication.