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.
In general, the unequal RF circuitry in the transmit and receive chains at the base station (BS) prevents the exploitation of the uplink (UL) channel estimate for proper pre-equalization in time division duplex (TDD) systems. To avoid additional transceiver hardware costs for matching networks, the idea of relative calibration was introduced to cope with the different effective channel impulse responses...
An approach to perceptual coding at the threshold level, for supporting the Digital Cinema System Specification (DCSS) standard, is presented. The proposed Perceptual DCSS Coder (PDC) follows the approach of the Visually Lossless Grey scale Image Coder (VLGIC) of adapting Human Visual System (HVS) modelling to the JPEG2000 coder, but extends it to multi-frame application for DCSS. This PDC first applies...
This study presents a audio watermarking that embeds information by energy-proportion scheme. By using normalised energy instead of probability, this study rewrites the entropy in information theory as an energy-proportion function. In order to guarantee the robustness of watermarks, low-frequency coefficients of discrete wavelet transform (DWT) are mapped into the domain of this function. Then, the...
A programmable radio baseband signal processor is one of the essential enablers of software- defined radio. As wireless standards evolve, the processing power needed for baseband processing increases dramatically and the underlying hardware needs to cope with various standards or even simultaneously maintaining several radio links. Meanwhile, the maximum power consumption allowed by mobile terminals...
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.