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Due to the rapid expansion of road and highway system around the world, there is a growing demand to monitor vehicle traffic patterns and road status by jurisdictional agencies charged with maintaining roads and ensuring the safety and usability of various highways within their jurisdictions. The feasibility of performing effective monitoring relies on cost, complexity and scalability of the traffic...
An important step towards seamless heterogeneous systems is the integration between WLAN and 3G cellular systems. Their interoperability has been frequently discussed in literature, however, there is still room for research in this issue. Since IEEE 802.11 networks reach relatively high data transmission rates when compared to other wireless networks, it has gained the attention of the cellular networks...
In the idea to create a realistic model of mobility and traffic for the networks of 3rd and 4th generation, we have studied many techniques of modeling and planning. Our choice was for the real network traces exploitation techniques, mainly because compared to other techniques this technique is very adapted to the real modeling. Although this technique is most convenient, it has many disadvantages...
One of the main problems facing accurate localization using Time-of-Arrival (TOA) measurements in wireless communication systems is Non-Line-of-Sight (NLOS) propagation. Classification is among the important NLOS mitigation approaches whereby the system attempts to identify and localize with the LOS base stations (BSs) only. In this paper, the impact of the number of NLOS BSs and their geometrical...
In this paper, we present a unified approach to analyze the exact statistical characteristics of the harmonic mean of N ≥ 2 statistically independent and non-identically distributed random variables (RVs), which we term the N-normalized harmonic distribution (i.e., NHD distribution), for the purpose of modeling the amplify-and-forward multihop relay channels. We present exact statistical metrics for...
Reuse partitioning is a useful method for mitigating co-channel interference (CCI) in orthogonal frequency division multiple access (OFDMA) based cellular environments. In this work, theoretical analysis of a series of reuse partitioning approaches is carried out, which contains the well-known Soft Frequency Reuse (SFR) scheme, the novel Enhanced Fractional Frequency Reuse (EFFR) scheme and two EFFR-derivatives,...
In this paper, we consider the improvement of the macro and micro diversity by the help of relays using a dynamic decode and forward (DDF) protocol. We first derive bounds on the macro and micro diversity for DDF and Patched-DDF protocols using distributed Mono-stream and Alamouti schemes. We then derive an auto-organized behavior of the relay that maximizes the macro and micro diversity of the broadcast...
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