Abdulgani Albagul

Secure data communication using blind source separation

In this paper, we presents a secure (noise-resistant) algorithm for data communication over the noisy channel , the message is converted to non-linear Hadamard code, which is having the maximum Hamming distance, which makes it more fault-tolerant in comparison to the ASCII input. The translated message is encrypted with a random signal by specific mixing. The encrypted message is further permutated and inserted in the image using pseudo-random sequence, which make the system more secure. Experimental results show that this system is working well in noisy environment.

Wireless smoke detection system

This paper attempts to integrate RF technology into smoke detector circuitry. In the proposed system, a smoke detector upon senses smoke activates its alarm, sends a low voltage signal to all other smoke detectors in the vicinity. This low voltage signal activates the individual relays in the other smoke detectors causing them to emit a tone that alerts residents that one of the smoke detectors senses smoke. In this system the transmitter and receiver are installed in a unit and the need for a base is eliminated. The individual smoke detectors are equipped with all the electronics required to both send and receive signals. They are battery operated and therefore they require no external connections. They can be installed by a homeowner just as they would a normal smoke detector. The proposed design is aiming to have Cost efficient system, Compact design, easily expandable, Simple to install, Replaceable components. The system was tested indoor and outdoor with different distance and with the presence of noise.

QoS Evaluation of Different TCPs Congestion Control Algorithm using NS2

The success of the current Internet relies to a large extent on cooperation between the users and network. The network signals its current state to the users by marking or dropping packets. The user then strives to maximize the sending rate without causing network congestion. To achieve this, the users implement a flow control algorithm that controls the rate at which data packets are sent into the Internet. More specifically, the transmission control protocol (TCP) is used by the users to adjust the sending rate in response to changing network conditions. In this paper, we focus on the degree of fairness provided to TCP connections by comparing two packet-scheduling algorithms at the router. The first one is FIFO (first in first out, or drop-tail), which is widely used in the current Internet routers because of its simplicity. The second is RED (random early detection), which drops incoming packets at a certain probability