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.
We report a FPGA-hardware implementation of a novel Hough-transform (HT) architecture. A DE4 platform with a Stratix-IV FPGA device has been applied to synthesize a complete prototype system. Due to parallelization of the voting procedure, XGA videos can be processed with a frame delay of 5.4 ms at an operating frequency of 200MHz. System suitability for detecting road lanes in automotive applications...
Sensor networks are characterized by strict resource limitations and large scalability. Many sensor network applications require secure communication, a crucial component, especially in harsh environments. Symmetric key cryptography is very attractive in sensor networks due to its efficiency, but establishing a shared key for communicating parties is very challenging. The low computational capability...
A jointly probabilistic approach to formulate the performance analyses of the outage probability and the average bit-error-rate (BER) is presented with the max-min relay selection scenario. The relay hop is modeled as a closed-form probability density function (PDF) of the composite Rayleigh plus log-normal fading variables with a conditioned relay power constraint. Numerical analyses with dual-hop...
A probabilistic approach to formulate the performance analyses of the outage probability and the average bit-error-rate (BER) is presented with the max-min relay selection scenario. The relay hop channel is modeled as a closed-form probability density function (PDF) of the composite Rayleigh plus log-normal fading variables and characterized by a log-normal standard deviation. Numerical results show...
Until now performance analyses about using the Rayleigh plus log-normal (composite) fading effect for relaying systems are still incomplete because it is generally accepted that underlying statistics do not lead to a closed-form expression. In this paper, we refine the analytical framework for cooperative relaying (dual-hop multi-relaying and direct links) based on a relaying power constraint scenario...
In this paper, we propose an analytical framework for cooperative dual-hop relaying over in-door composite fading environments. We focus on overcoming the limitations of non-closed form problems of log-normal statistics and simplifying the tremendous complication of former frameworks. The approximated expressions combined outage and bit-error-rate (BER) probability are derived and analyzed in terms...
Instead of using eigen-beamforming approach to increase capacity gain, an optimal pre-weighting scheme is employed in the closed-loop multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (MIMO-OFDM) wireless system design under subcarrier cluster constraint. This scheme adopts an up-link scale weight vector on the space-time block code (STBC) signals in accordance to its...
An effective relay selection scheme is developed using likelihood decision rule for two-hop stationary multi-relaying network. This scheme is based on the concept that we select the relay node most likely to have the highest probability of channel power gain distribution across the cluster of relaying links. By utilizing an amplify-and-forward (AF) relaying scenario, our selection criterion is subject...
Instead of using eigen-beamforming approach to increase capacity gain, an optimal pre-weighting scheme is employed in the closed-loop multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (MIMO-OFDM) wireless system design under subcarrier cluster constraint. This scheme adopts an uplink scale weight vector on the space-time block code (STBC) signals in accordance to its...
In this paper, we study the confidence interval for average amplification gain in a symmetric Dual-Hop Semi-Blind (DHSB) amplify-and-forward (AF) relaying system. This system uses the local mean of instantaneous signal-to-noise ratio (SNRi) in the first hop which is estimated by averaging over a certain number of samples. Outage probability is calculated on average of the number of blocks since relay...
Instead of using a codebook-based or quantized channel feedback, a long-term pre-weighting scheme incorporated with optimum decision algorithm is employed in a closed-loop multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (MIMO-OFDM) wireless system. In particular, this approach provides an up-link scale weight vector pre-weighting space-time block code (STBC) signals...
Instead of using eigen-beamforming approach to increase capacity gain, an optimal weight scheme is employed in the closed-loop multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (MIMO-OFDM) wireless system design. In particular, this scheme provides an uplink scale weight vector pre-weighting space-time block code (STBC) signals at each transmit sub-carrier in accordance...
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.