Abstract: In this letter, a general auto-correlation based frequency offset estimation (FOE) algorithm is analyzed. An approximate closed-form expression for the Mean Square Error (MSE) of the FOE is obtained, and it is proved that, given training symbols of fixed length N, choosing the number of summations in the auto-correlation to be 〈N/3〉 and the correlation distance to be 〈2N/3〉 is optimal in that it minimizes the MSE. Simulation results are provided to validate the analysis and...
The purpose of this project is to develop a model that is capable of recognizing daily basic human activities under real-world conditions, using data collected by a waist-mounted triaxial accelerometer and gyroscope built into a cellphone (in our study, a Samsung Galaxy S II). Activity recognition is formulated as a supervised classification problem, whose data is obtained via an experiment having 30 human subjects perform each of the activities. Our classification models have been trained...
Abstract One major concern of network and data security consultants globally is the capabilities of infectious malicious cyber-attacks (Malware) to invade the entire population of the network terminals within few days of an outbreak of an attack to wreak havoc ranging from identity theft, financial fraud to systemic digital assault on critical national assets. It is known that when the vulnerable mobile device communicates with the infected nodes, it becomes infected. This work studi...
BACKGROUND OF STUDY Chandrasekhar (2001). Information Communication Technology are defined, for the purposes of this primer, as a “diverse set of technological tools and resources used to communicate, and to create, disseminate, store, and manage information.” These technologies include computers, the Internet, broadcasting technologies (radio and television), and telephony. Information and communications technology is often used as an extended synonym for information technology , but...
What is computer? Computer can be defined as an electronic device that operates under the control of instruction that is installed in its memory units. It can also mean an electronic device that receive data as an input, process and bring out the result as an output. With the definition above, one can understand that computer is just a device (electronic device) which operate and control other parts. What is computer system? Computer system like any other system is the combination of interna...