This research paper investigates the suitability and performance of space-frequency block coded Multi-Band Orthogonal Frequency Division Multiplexing (MB-OFDM) system under UWB (Ultra-Wideband) channel model. The employment of transmit diversity techniques based on block codes is expected to achieve enhancement in such systems since it greatly reduces the detrimental effects of multipath fading. In the proposed MB-OFDM UWB system, the space coded symbols are distributed as space-frequency block codes over neighboring sub-carriers, therefore the space-frequency coding is independent of the time-frequency codes used in MB-OFDM system. The research paper shows performance improvement obtained by the proposed space-frequency coded MB-OFDM scheme.
The rise of the Geoinformation Industry in the past decade has generated a high demand for suitably educated graduates worldwide. This demand has only been partly met by the higher education sector. This research paper draws on seven-years experience of postgraduate teaching GIS via distance learning mode. Experience has shown that in setting-up, maintaining and developing the GIS course via distance learning, particular consideration has to be given towards the cultural and geographical diversity of students. Moreover, the dynamic nature of GIS and the Internet itself require the constant revision of curriculum and teaching methods.
According to Mark Casson entrepreneur is Someone who specializes in taking judgmental decisions about the coordination of scarce resources. It has been widely acknowledged that entrepreneurship and innovation are vital forces in explaining the development of big business, international business and global competitiveness of economies in general. Yet, there is little consensus of what entrepreneurial activity and innovation actually entails. This research paper draws on a Stretched definition of the entrepreneur. This paper considers that innovation is about turning opportunities into new products and services. This comes about by applying new combinations of knowledge, which are diffused within and outside firms.