K. J. Krizman, T. H. Biedka and T. H. Rappaport, "Wireless Position Location: Fundamentals, Implementation Strategies, and Sources of Error", in IEEE VTC '97 Proceedings, Phoenix, AZ, May 5-7, 1997, pp. 919--923.  Home/Search   Document Not in Database   Summary   Related Articles   Check

.... triangulating the line of bearing measurements from the mobile station to as few as two base stations [24] TDOA calculates the mobile s position by intersecting the hyperbolic areas described by each difference in time of arrival measurement of the mobile s signal to at least three base stations [25]. Both methods exhibit poor performance in rural areas because triangulation is not feasible due to the linear orientation of the base stations along roads [22] The advantages to network based solutions include wide availability and arguably, efficient deployment due to its ability to overlay ....

K.J. Krizman, T.E. Biedka, T.S. Rappaport, "Wireless Position Location: Fundamentals, Implementation Strategies, and Sources of Error", 1997.

....the condition that a node has some neighbor in any of its small enough piearea is met. This condition provably ensured the connectivity of the network, which failed to be achieved by neither LINT nor LILT. Another significant feature of CBTC was its usage of the Angle of Arrival (AOA) technique [5], instead of GPS support assumed in other, especially centralized, topology control algorithms. In this paper, we propose a distributed topology control algorithm (referred to as scheme 1) based on directional antenna technology [ 6] In contrast to CBTC, we relax the requirement of ....

....arrival to sector of arrival. In other words, scheme 1 requires a far less recognition precision. Therefore, obtaining only the information of the sector that a signal comes in with directional antenna in this scheme may cost less, in terms of the DSP capability, number of antenna elements, etc. [5], than the AOA technology used in CBTC. For comparison purpose, we also introduce an AOA based version of our algorithm as scheme 2. The other contribution of this paper is to evaluate the interrelationship between the resulting node degree, the commonly used metric for evaluating topology control ....

K. Krizman, T. E. Biedka, and T. S. Rappaport, "Wireless position location: fundamentals, implementation strategies, and source of error," in IEEE 47th Vehicular Technology Conference, 1997, pp. 919--23.

.... , with with h 15 . Techniques to estimate direction without positioning information are available, and discussed in the IEEE antenna and propagation community as the Angle of Arrival (AOA) problem. It can be accomplished by using more than one directional antenna. We refer to [7]. If the radio communication unit is not capable to conclude the direction of a message, we can alternatively supply a node with a more abundant global positioning unit, and calculate directions from positions piggybacked to messages. Compared with [3] we have a weak physical radio propagation ....

K. Krizman, T. E. Biedka, and T.S. Rappaport, "Wireless position location: fundamentals, implementation strategies, and source of error," in IEEE 47th Vehicular Technology Conference, 1997, vol. 2.

....direction # #, with with 0 # # 2#. Techniques to estimate direction without positioning information are available, and discussed in the IEEE antenna and propagation community as the Angle of Arrival (AOA) problem. It can be accomplished by using more than one directional antenna. We refer to [7]. If the radio communication unit is not capable to conclude the direction of a message, we can alternatively supply a node with a more abundant global positioning unit, and calculate directions from positions piggybacked to messages. Compared with [3] we have a weak physical radio propagation ....

K. Krizman, T. E. Biedka, and T.S. Rappaport, "Wireless position location: fundamentals, implementation strategies, and source of error," in IEEE 47th Vehicular Technology Conference, 1997, vol. 2.

....ray has one half the power of the first ray and is delayed by one half chip duration. The multipath component is seen to bias the tracking of the DLL. Several methods have been developed to mitigate the effects of multipath on delay estimation, including a high resolution frequency estimator [41] and a least mean square based (LMS) technique [42] Super resolution techniques such as the Root MUSIC and the TLS ESPRIT algorithm have been utilized to detect multipath components that conventional detectors are unable to detect [43, 44] Delay estimators based on the Extended Kalman Filter ....

K. Krizman, T. Biedka, and T. Rappaport, "Wireless position location: Fundamentals, implementation strategies, and sources of error," in IEEE Vehicular Technology Conference, pp. 919--923, 1997.

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K. J. Krizman, T. H. Biedka and T. H. Rappaport, "Wireless Position Location: Fundamentals, Implementation Strategies, and Sources of Error", in IEEE VTC '97 Proceedings, Phoenix, AZ, May 5-7, 1997, pp. 919--923.

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