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OFDM is promising technology and has approved for various wireless system like 4G mobile system, Wireless Local Area Network (WLAN), Wimax etc. But due to carrier frequency offset (CFO) causes from Doppler spread and drift in local oscillator frequencies of transceiver leads to inter carrier interference (ICI). The ICI is the biggest limitation of OFDM system. In this paper, an optimized sinc power...
Modern day radio-telescopes need extremely sensitive receivers combined with powerful signal processing capabilities. Rapid urbanization and proliferation of communication devices has made these telescopes vulnerable to increasingly high levels of Radio Frequency Interference (RFI). This has necessitated development of algorithms for the mitigation of the effects of RFI either in real time or during...
The function of a femtocell is to extend the cellular coverage to areas where the signal from base station cannot be received, thus improving the indoor wireless services. However, under the expected co-channel deployment of femto and macro-cells, a significant number of calls originating from femtocell users get dropped or blocked. This blocking rate problem must be controlled so that the femto users...
In today's world 70–90% wireless communication occurs inside the building area. However, due to high wallpenetration loss the signal quality falls below the desired level. Therefore, low power femto base stations are deployed inside the buildings to enhance the indoor coverage and signal strength. In this paper, we have considered a building area located at the cell edge. In the first part of the...
Body Area Networks (BAN) is an emerging area in the field of wireless communication and remote health monitoring. An important concern in BANs is the interference from existing wireless networks. In the year 2002 a 50 MHz spectrum was proposed for IEEE 802.11y from 4940MHz to 4990MHz for WLAN channels 20 to 26 which is a potential interferer for BANs. The paper suggests the modified Hermite pulses...
The Increasing demand of cellular communication services and limited frequency spectrum leads to a NP hard dilemma of channel allocation. Most of the existing channel allocation techniques are Dynamic Channel Allocation based on various optimization algorithms, minimizing the call blocking probability by desolating electromagnetic compatibility constraints, which produces significant interferences...
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