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Localization of mobile devices is an area of much interest in both the commercial, and government sectors. One particular method of localization uses time-difference of arrival (TDoA) measurements from multiple receivers. This can be done using shared timestamps indicating the time of arrival (ToA) among distributed receivers. High resolution timestamps are particularly important to ensure reasonable...
TCP performance in contention-based multi-hop wireless networks is shaped by two main factors, which are unlike the wired network case. First, the maximum throughput for a given topology and flow pattern is reached for a specific congestion window. This window is very difficult to detect under dynamically changing network traffic. Second, the excessive control traffic consumes channel bandwidth more...
In this paper, We improve the transmission mechanism of the WLAN (wireless local area network), so that it will be suited to the wireless CBTC (communication based train control). Considering the characteristic of the wireless CBTC, the author brings forward a new frequency allocation proposal, which is combined all of sub-channels into an operating channel. The advantage of this improvement is that...
In this paper, we provide a saturation throughput analysis of the IEEE 802.11 protocol at the data link layer by including the impact of both transmission channel and capture effects in Rayleigh fading environment. Impacts of both non-ideal channel and capture effects, specially in an environment of high interference, become important in terms of the actual observed throughput. As far as the 4-way...
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