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.
The novel algorithm proposed in this paper is an optimal algorithm, both blind and training data based channel estimation algorithms are described; however, the issue of computationally efficient multiuser detection is not addressed. The multiuser detection is investigated in a long code CDMA system over frequency selective multipath channel. The issue of channel estimation is not addressed here,...
Recently, a new transmitted reference (TR) pulse cluster structure was proposed. This new structure contains uniformly and compactly spaced reference and data pulses, and thus enables a simple, robust and practical auto-correlation detector to be used in the receiver. Our previous research showed that inter-pulse interference (IPI) is present in the received TR pulse cluster signal due to the dense...
This paper addresses the issue of advanced multiuser detection and equalization for multiuser space-time transmission over multipath multiple input multiple output (MIMO) fading channel. Instead of resorting to the straightforward analogy between users and antennas, we introduce a low-complexity approach where multiuser interference (MUI) cancellation and intersymbol interference (ISI) suppression...
Receiver space diversity based on millimeter-wave self-heterodyne transmission technique is demonstrated and its effective gain in two-path channel environments is theoretically and experimentally characterized. Under two-path channel environments, it is shown that the outputs of two receiver diversity modules have different amplitude but almost same phases without employing any millimeter-wave band...
In our paper we present a comparison between multiband time-hopping impulse radio and multiband OFDM ultra wideband (UWB) systems. For the time-hopping impulse radio we consider the multiband time-hopping pulse amplitude modulation UWB system that uses Hadamard sequences to distribute power of a single information bit to all the available subbands. In the multiband OFDM UWB system we use interference...
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...
We describe ongoing research and product development focused on the theory, system design, and capacity gains from incorporating reverse link interference cancellation into commercial CDMA basestations. The work considers receiver architecture design tradeoffs, link cancellation efficiency in multipath fading channels, and the multi-cell network operation and performance
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.