Showing papers by "Abdullah-Al Nahid published in 2010"

Analysis of Large Scale Propagation Models for Mobile Communications in Urban Area

Abstract: Channel properties influence the development of wireless communication systems. Unlike wired channels that are stationary and predictable, radio channels are extremely random and dont offer easy analysis. A Radio Propagation Model (RPM), also known as the Radio Wave Propagation Model (RWPM), is an empirical mathematical formulation for the characterization of radio wave propagation as a function of frequency. In mobile radio systems, path loss models are necessary for proper planning, interference estimations, frequency assignments and cell parameters which are the basic for network planning process as well as Location Based Services (LBS) techniques. Propagation models that predict the mean signal strength for an arbitrary transmitter receiver (T R) separation distance which is useful in estimating the radio coverage area of a transmitter are called large scale propagation models, since they characterize signal strength over large TR separation distances. In this paper, the large scale propagation performance of Okumura, Hata, and Lee models has been compared varying Mobile Station (MS) antenna height, Transmitter Receiver (TR) distance and Base Station (BS) antenna height, considering the system to operate at 900 MHz. Through the MATLAB simulation it is turned out that the Okumura model shows the better performance than that of the other large scale propagation models.

The Framework for Implementing ECommerce: The Role of Bank and Telecom in Bangladesh

Abstract: In this paper, we describe an effective framework for adapting electronic commerce or e-commerce services in developing countries like Bangladesh. The internet has opened up a new horizon for commerce, namely electronic commerce (e-commerce). It entails the use of the internet in the marketing, identification, payment and delivery of goods and services. At present internet facilities are available in Bangladesh. Slowly, but steadily these facilities are holding a strong position in every aspects of our life. E-commerce is one of those sectors which need more attention if we want to be a part of global business. Bangladesh is far-far away to adapt the main stream of e-commerce application. Though government is shouting to take the challenges of e-commerce, but they do not take the right step, that is why e-commerce dose not make any real contribution in our socio-economic life. Here we propose a model which may develop the e-commerce infrastructure of Bangladesh. Index Terms —Electronic commerce, Computer network, Digital communication, Electronic transactions, Telecommunication. —————————— � ——————————

SMS advertising and its prospects in Bangladesh

Abstract: Application of SMS advertising for enhancing communication with the consumers has drawn significant attention of the contemporary researchers. This study examines whether SMS advertising can be an effective medium of advertising in Bangladesh. The key ingredient of this research is the perception of consumers regarding the adoption SMS advertising. Qualitative and quantitative data derived from field interviews with prospective customers of different business has been used to identify potential relationships among the impact of SMS advertising adoption in Bangladesh and the perception of the respondents. With insight from the interviews, hypotheses has been derived and tested with quantitative data gathered via a direct survey instrument with 160 business stakeholders who has the potentiality to get influenced directly in if the system can be established across four divisions of Bangladesh. The propositions presented in this study provide preliminary evidence that consumers has shown positive attitude in accepting SMS ads via their mobile phones. The study will contribute significantly regarding the policy making of both the business professionals as well as advertising professionals in selecting and establishing the proper advertising methods as well as medium in future for operating in the best possible way in the country. Future researches on this particular field may require to look at issues like cultural factors of the concerned communities and global phenomenon.

Analysis of Large Scale Propagation Models for Mobile Communications in Urban Area

Abstract: Channel properties influence the development of wireless communication systems. Unlike wired channels that are stationary and predictable, radio channels are extremely random and dont offer easy analysis. A Radio Propagation Model (RPM), also known as the Radio Wave Propagation Model (RWPM), is an empirical mathematical formulation for the characterization of radio wave propagation as a function of frequency. In mobile radio systems, path loss models are necessary for proper planning, interference estimations, frequency assignments and cell parameters which are the basic for network planning process as well as Location Based Services (LBS) techniques. Propagation models that predict the mean signal strength for an arbitrary transmitter receiver (T R) separation distance which is useful in estimating the radio coverage area of a transmitter are called large scale propagation models, since they characterize signal strength over large TR separation distances. In this paper, the large scale propagation performance of Okumura, Hata, and Lee models has been compared varying Mobile Station (MS) antenna height, Transmitter Receiver (TR) distance and Base Station (BS) antenna height, considering the system to operate at 900 MHz. Through the MATLAB simulation it is turned out that the Okumura model shows the better performance than that of the other large scale propagation models.