Papers by Goran Zdravevski
Creating Android Applications
IEEE 802.16e, mobile Wi-Max, is a wireless technology used to provide very high data rate over la... more IEEE 802.16e, mobile Wi-Max, is a wireless technology used to provide very high data rate over large areas to a large number of users where broadband is unavailable. In mobile wireless environment the channel is hostile and behaves adversely. To combat the fading caused by wireless channel IEEE 802.16e uses OFDMA (orthogonal frequency division multiple access) as a transmission scheme based on multicarrier modulation.. To investigate the performance of mobile Wi-Max, its physical layer is simulated using Matlab and bit error rate (BER) performance is observed. Further performance improvement is achieved using forward error correction codes (FEC). Two codes, convolution code (CC) and low density parity check code (LDPC) are considered for this purpose. BER performance is evaluated for these codes under different conditions. Finally, BER performance is compared using different FEC for mobile Wi-max.
Many advanced data services are driving up wireless technology, which is further boosted by growt... more Many advanced data services are driving up wireless technology, which is further boosted by growth in advanced market segments. The wireless industry is evolving from a Web of independent networks into a single integrated network with multiple standards; the expectation is that WI-FI, WI-MAX and 3G will coexist to enable a host of exerting new applications and business models. This paper focuses on concepts of WI-MAX technology, which employs microwave for the transfer of data wirelessly, and it also presents its comparison with WI-FI, and 3G technologies. WI-MAX is delivering broadband wireless access to the masses and represents alternative to digital subscriber lines (DSL) and cable broadband access. WI-MAX is based on IEEE 802.16 standard and is scalable. It stands for wireless (WI) microwave access (MAX). WI-MAX will provide anywhere, anytime connectivity. Features of WI-MAX are OFDM i.e. orthogonal frequency division multiplexing, sub channelization, directional antennas and adaptive modulation, which make WI-MAX as the technology of today. The Benefit of WI-MAX technology is that the signals can be run very close to each other on wireless channels. Super narrow lanes can put a lot of traffic over them without disturbance. Many technologies currently available can only provide line of sight (LOS) coverage; the technology behind WI-MAX has been optimized to provide excelled non-line of sight (NLOS) coverage.
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Papers by Goran Zdravevski