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Showing 1 to 5 of 5 for “"LMR systems"”.
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Measurement of Antenna Performance in Analog LMR Systems Using PL Tone Analysis
… antenna performance in analog land mobile radio (LMR) FM systems. The gain (efficiency and directivity) and self-impedance of an antenna sufficiently characterize its performance and a number of traditional methods exist to measure these quantities. However it is hard to do antenna gain …
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Impact of Queuing Schemes and VPN on the Performance of a Land Mobile Radio VoIP System
Land mobile radio (LMR) systems are used for communication by public safety and other government and commercial organizations. LMR systems offer mission-critical or even life-critical service in the day-to-day activities of such organizations. Traditionally, a variety of different LMR systems have …
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Investigation of a Packet-Switched Inter-System Interface for Land Mobile Radio Systems
… and up to this date, Land Mobile Radio (LMR) systems have been interconnected via leased lines and microwave links across circuit-switched networks. With the recent deployment of digital LMR standards such as the Association of Public and Communications Officials (APCO) Project 25 and the …
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L(1)-Optimal Control Using State Space, Controlled Invariance Based Methods
… based solution method to linear time-invariant systems (LTI) is presented first. Also included is a discussion of a related estimation technique which utilizes a set-valued estimation approach to produce an estimate which is optimal in an $\ell\sp{\infty}$-induced norm sense. The controlled …
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Design Considerations in a Modern Land Mobile Radio System
… view of the distinguishing components in modern LMR systems. Discussions related to trunked channel allocation, coverage, costs, security, and other capabilities are given. The application to and effect on everyday users is also considered. Several quantitative examples are provided to assist the …