In brief

Abstract

PAGE 395 A solution to avoid relay attacks on keyless entry systems in vehicles is proposed in work from Korea. In conventional systems, the proximity of the key to the vehicle is approximated using received signal strength. The proposed approach applies an additional layer of security using a channel correlation-based proximity authentication scheme to prevent relay attacks. PAGE 376 Researchers in the USA report the use of a digital filter with adaptive coefficients to correct current sensing and temperature variation in DC/DC switch mode power supplies. Tighter output voltage regulation is achieved with this filter and current sensing can be applied to systems without adaptive voltage positioning. The filter is suitable for computing, telecom, and storage applications. A channel correlation-based proximity authentication scheme for keyless entry systems for vehicles. PAGE 385 Digital television signals in urban environments are used to improve passive radar target detection performance in work from China. This work combines traditional polarisation theories with passive radar detection to reduce interference within built up urban environments using a dual-polarisation antenna array. Correct current sensing with a digital filter with adaptive coefficients for DC/DC switch mode power supplies. PAGE 336 Researchers in Japan make a combined wireless local area network system and smart antenna to suppress interference in busy locations, such as shopping malls and stadiums. The device has eight internal antennas that are dynamically selected by high-speed switching to maintain network service. A large improvement in interface suppression with this device is demonstrated in comparison with centralised antennas. Passive target detection in urban areas is improved by taking advantage of polarisation diversity in digital television signals. PAGE 359 Electromagnetic reflectivity from twill-weave carbon fibre reinforced polymers (CFRP) is measured in work from Austria. Different fibre patterns of the CFRP were investigated, including unidirectional, shredded and twill-weave fibres. Twill-weave fibres showed a sharp angular dependency in reflectivity in response to millimetre waves at 60 GHz. The fibres are manufacturing materials for vehicles and are targets for millimetre wave radar. Integration of eight internal antennas into a wireless local area network system to suppress interference in busy locations. The electromagnetic reflectivities of different patterns of carbon fibre reinforced polymers are measured.