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This paper examines the problem of non-line-of- sight (NLOS) identification and mitigation for geolocation signals in mobile networks. A ray tracing tool is used to simulate a mobile radio network with fixed base stations and thousands of mobile stations. The channel data between these mobile stations and base stations is used to extract parameters or features that are used for classification. Techniques...
Increased network capacity and transmission speed has driven the development of many different wireless standards. Radio Frequency (RF) Technology has also been improving with the changing wireless standards. Such developments demand high linearity and power added efficiency from the RF Power Amplifier (RFPA). 5th Generation wireless standard (5G) is the next generation standard for mobile telecommunications...
This paper investigates the impact of frequency separation between RF channels on the non-linear behavioural model of a 30MHz to 2000MHz, 25W GaN Wide- Band Power Amplifier. Tests have been carried out under the presence of concurrent dual-band RF input signals. The measurement has been made with one channel (Channel-B) fixed at 1GHz, and the other channel (Channel-A) centred at different spectral...
In this paper, joint partial relay selection (PRS) and power allocation methods are proposed in conjunction with cooperative maximum likelihood (ML) detectors. These methods are considered for selecting relay nodes that improve the bit error rate (BER) performance of a two-phase multiple-input multiple-output (MIMO) half-duplex decode-and-forward (DF) relay system with log-normal shadowing and power...
In this paper, cross-layer design methods are proposed for jointly detecting data streams and dynamically allocating power within a multiple-input multiple-output two-phase cooperative wireless communication system operating in a spatial multiplexing configuration and with single and multiple decode-and-forward (DF) relays. The proposed joint detection and power allocation schemes employ a maximum...
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