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— In this paper, we apply two different types of space-time block codes (STBC) in the downlink of a broadband mobile radio air interface based on MC-CDMA, which is a promising candidate for a 4 th generation mobile radio system. The first type are " STBCs from orthogonal designs ". For 2 TX-antennas, this is the well-known " Alamouti "-scheme. These STBCs(More)
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In this paper we address the benefit of observing a signal of opportunity for mobile terminal positioning. In an exemplary environment we arrange three mobile terminals in an equilat-eral triangle. These mobile terminals determine their position relatively to each other by transmitting and receiving mobile radio signals. In addition they observe a signal of(More)
—Swarm navigation systems are emerging technique to investigate unknown environment. Organizing the access of shared radio channel is one of the main challenges due to the massive number of anarchical agents and the crucial mission requirements, e.g. update-rate and position accuracy. In this paper, we design a radio-based swarm navigation system and(More)
— In this paper, we investigate broadband OFDM systems which apply beamforming in combination with different space–time diversity techniques. Various beamforming scenarios with transmitter and/or receiver sided beamforming are considered. Space–time diversity is obtained by cyclic delay diversity (CDD) in order to artificially shape the spectrum of the(More)