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 represents a design of multiple input multiple output multi band ultra wide band (MIMO-MB-UWB) system by using four antennas at the transmitter and eight antennas at the receiver with the combination of orthogonal space time block code encoders and minimum mean square (MMSE) equalizes. The proposed system used for a short range wireless communication and is one of the most promising technologies...
This work explores beam forming and two-way relaying to alleviate the dual issues of the spectrum congestion and spectrum under-utilization. These problems can be alleviated by the implementation of underlay cognitive radio networks. However, their reliability, capacity or power, and coverage depend on bi-directional or abbreviated as primary-to-secondary or abbreviated as (P2S) and secondary-to-primary...
Reconfigurable technology plays a critical role in the development of Next-generation wireless communication systems. OFDM is wireless communication technique in which digital data is encoded in large number of closely spaced orthogonal sub-carrier signals. The paper discusses the Baseband FPGA implementation of an OFDM transmitter. The module is implemented using a technique called partial reconfiguration...
FPGAs play an important role in the implementation of modern communication systems like Cognitive radios (CR). The CRs are designed to run multiple waveforms based on environment sensing. The waveforms can be multicarrier and can have wider bandwidths and high data rate. The radio platform will be loaded with multiple executable files depending on the waveforms which will use different source coding,...
With congested wireless spectrum and increasing number of users, cognitive radio serve as a panacea for efficient spectrum utilization. This stands to substantiate the amount of research happening in this area. Spectrum sensing is indubitably a key functionality in cognitive radio, which helps determining the spectral holes and white spaces for the secondary users to communicate. In this paper, the...
The OFDM module in the MB-OFDM UWB transmitter is necessarily operated at 528 MHz. This is really a challenging task because the OFDM in the UWB module has to calculate 128-point IFFT. Earlier papers used radix-24 SDF algorithm with parallel processing architectures of block size two to achieve the required speed and implemented the module on ASIC. In this paper a novel scheme ldquomodified radix-2...
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.