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This paper reports propagation characteristics estimated from quasi-simultaneous channel measurements centered at the VHF frequencies 37.8, 57.0, and 77.5 MHz. The measurement experiments were conducted with low antenna heights (2 m) for both the base and mobile terminals and are therefore considered applicable to tactical and emergency communication scenarios. Multipath-induced time dispersion and...
An algorithm to perform maximum likelihood (ML) timing estimation for continuous phase modulation (CPM) is proposed. It is shown, that a relatively simple basis function representation of several commonly used CPM signals, yields an approximate ML timing solution performing close to the lower bound for any unbiased estimator.
In this paper we propose and implement cross-layer network design models with three different MAC protocols: CSMA-CA, CSMA-CA with RTS/CTS, and ALOHA. These network models are used to study the behavior of Cross-Layer Designs (CLDs) in case of dynamic network topologies with different transmission ranges and network sizes. A similar network model but with a conventional Oblivious Layered Design (OLD)...
Large scale characterization of the channel average power-delay properties is considered based on quasi-simultaneous mobile propagation measurements at the lower VHF frequencies 37.8, 57.0, and 77.5 MHz. The measurements were conducted in three different environments using vehicle height antennas at both the fixed and mobile terminals, and are therefore considered applicable to tactical networking...
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