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It is known that the accumulated contact data of all stations of multistatic sonar arrays cannot be handled by traditional VHF links. While other technologies like satellite communication systems could handle the amount of data, these systems are usually too costly in terms of money, weight, or power consumption to be deployed on sonar buoys. Therefore, we installed commercial off-the-shelf WLAN with...
Along with Popularization of WLAN, The importance of Network Planning is given prominence to designer gradually. The paper give analyzing and research from requirement of user, coverage capability, load capability, interference issue, test of WLAN etc. and offer reference about deployment of WLAN.
Multi-user MIMO is a promising technology to enhance the performance of WLANs. However, the MAC protocol of the IEEE 802.11 standard (the DCF MAC protocol) is not able to solve the new coordination and synchronization issues that are needed to enable multiple simultaneous transmissions. This paper presents an enhanced MAC protocol for Downlink SDMA in WLANs where only the Access Point is equipped...
For the problems of the unfeasibility of the optical fiber deployment and the inflexibility of the network optimization in the current Distributed Antenna System (DAS) based on Radio over Fiber (RoF) technology, this paper presents a novel wireless network architecture using Radio over Free Space Optics (RoFSO) for wireless local area networks (WLANs). RoFSO not only transmits various kinds of radio...
With the increase in the channel bandwidth to satisfy data rate requirements, the saturation of unlicensed bands quickly becomes a source of difficulty. The collisions that result from the ineluctable frequency reuse will then seriously hinder MAC layer performance. In this paper, we propose a new cross-layer aggregation scheme that increases throughput as a result of compromise between robustness...
In this paper, high performance MAC is designed and implemented to support multi-gigabit physical layer. New algorithms and Control channels are introduced for low MAC latency and high MAC throughput. The new multi-gigabit nomadic/local area wireless access, called NoLA, is implemented using the proposed MAC. NoLA demonstrated the multi-gigabit service with full HD video streams where the proposed...
Providing high data rates to wireless users has long been a goal that has driven the development of new technologies and standards in the past decade. Now, with the opening up of the spectrum at 60 GHz, it has become possible to design WLANs that can meet the goal of Gbps/user connectivity. This paper examines several unique design challenges brought about because of the physical characteristics of...
The advanced MIMO (multiple-input multiple-output) system can provide higher capacity gain or higher diversity gain in modern wireless networks. The capacity gain is achieved by interference cancellation technique to fully utilize the spatial degree of freedom. In a multiuser wireless system, the increased degrees of freedom provide the chance to select multiple wireless stations (STAs) to maximize...
Wireless local area networks (WLANs) are more deployed today than ever before. However, this rapid growth led to uncoordinated deployment and planning tools are rarely used. In this paper, we first propose a mathematical model to solve the WLAN planning problem considering directional antennas. The problem consists of selecting the location of the access points in the network and selecting the transmit...
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