The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This work proposes an adaptive frequency-domain equalizer (FDE) for single carrier and OFDM indoor over Gbps data rate wireless receiver. System simulation and specifications are based on the IEEE 802.15.3c standard. The proposed LS-LMS FDE uses low computational complexity Least-Mean-Square (LMS) algorithm with Least-Square (LS) channel estimation to accelerate the convergence speed. The FDE can...
This paper presents concepts for balanced-fed aperture antennas realised on different LTCC substrates. The aim is to obtain efficient radiating elements for 60 GHz monolithic transceivers for WPAN systems. The simulation results of the antenna itself fabricated on DuPont 943 Low-loss Tape are compared to the measurements, and also to the simulated results of the same structure realised on DuPont 9k7...
In this paper, we present an efficient cooperative transmission scheme for high speed 60 GHz WPAN system. We consider a transmission system which consists of a source, a destination, and a relay. Data transmission from a source to a destination consists of first and second tine frames. In the first frame a source broadcasts encoded information bits by using a convolutional code (CC). In the second...
Because of the unknown position of devices in ad-hoc network, it is difficult for the MAC to discover other devices by using directional antenna. This device discovery procedure needs extra signaling and costs considerable time, especially if there are a lot of devices. In this paper, on top of IEEE 802.15.3 MAC, we introduce the ultra superframe concept and propose an on-demand device discovery mechanism...
This paper proposes a cross-layer unequal error protection (UEP) scheme that supports compressed video transmission in 60 GHz wireless personal area network (WPAN) systems. The proposed scheme combines MAC layer aggregation with PHY layer hierarchical modulation mapping, which offers better visual-quality transmission over conventional equal error protection (EEP). Computer simulations show that under...
The paper presents results of design and computer simulation of planar monopole pulse ultra-wideband (UWB) antenna for WPAN applications. A complex approach to design of UWB antennas was used. Problem of radiation of UWB signals by the antenna was discussed. Electric fields radiated by the antenna for chosen directions were calculated and shown.
In a multiple band orthogonal frequency division multiplexing (MB-OFDM) ultra-wideband (UWB) based wireless personal area network (WPAN) system, the performance is heavily affected by multiple access interference caused by nearby MB-OFDM transceivers in addition to AWGN. In this paper, we study the effect of multiple user interference on the bit error rate (BER) of MB-OFDM systems operating over frequency-selective...
This paper introduces the design and the implementation of the 60 GHz amplifier MMICs and the module for the 60 GHz WPAN system with a RoF (radio-over-fiber) link. The MMICs were designed using ETRI's 0.12 mum GaAs PHEMT 4-inch process. The MCLFs (microstrip coupled line filters) compared with the MIM (metal-insulator-metal) capacitors have greater stability and less effect by the variation of fabrication...
Millimeter-wave OFDM wireless personal area network system applying adaptive modulation for grouped sub-carriers was newly developed. It is composed of 100 MHz sampling speed OFDM modems which can employ adaptive modulation for every 8 neighbored subcarriers, and 70-GHz band self-heterodyne transceivers equipped with receiver space diversity. The detailed specifications and the expected maximum throughput...
In multi-band orthogonal frequency division multiplexing (MB-OFDM) wireless personal area networks (WPAN) system, a robust signal detection algorithm is required for practical hardware implementation. In the literature, the signal detection algorithms for OFDM are based on correlating the received signal with a time delayed replica of itself. The result of correlation is then compared with a threshold...
In this paper, a statistical-based ultra-wideband (UWB) indoor channel model which incorporates the clustering of multipath components (MPCs) is proposed. The model is derived based on measurement data collected in the frequency band of 3-10 GHz in various types of high-rise apartments under different propagation scenarios. The aim here is to investigate in more detail the clustering of MPCs phenomenon...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.