| 1. |
- Girish, V V, et al.
(författare)
-
A Novel Initial Ranging Algorithm for mobile WiMAX (802.16e)
- 2010
-
Ingår i: International Journal of Computer Applications. - : Foundation of Computer Science. - 0975-8887. ; 1:3, s. 95-100
-
Tidskriftsartikel (refereegranskat)abstract
- Initial ranging process plays an important role in the mobile worldwide interoperability for microwave access (WiMAX) standard (IEEE 802.16e). Timing offset adjustment, power offset calculation and synchronization between the base station and all the users within a cell are achieved during the initial ranging process. A comparative study of existing and a novel ranging algorithm is proposed in this paper. Most of the current ranging algorithms do not take in to account the interference created by the ranging codes sent by other ranging users in an Orthogonal Frequency Division Multiple Access (OFDMA) setup [2][4][5][7]. The novel ranging method cancels the interference created due to the other raging codes in the ranging area. The simulation results indicate a significant improvement in performance under practical scenarios.
|
|
| 2. |
- Moreira e Silva Bernardes, Maurício, et al.
(författare)
-
Original Design in a Copying-Intensive Industry
- 2017
-
Ingår i: International Journal of Computer Applications. - New York : FCS® (Foundation of Computer Science). - 0975-8887. ; 159:7, s. 29-38
-
Tidskriftsartikel (refereegranskat)abstract
- In some industries, copying is common and extensive. Most literature on the topic focuses on legal issues and interprets copying as a problem. To better understand the copying phenomenon, this study investigates the relationship between copying and design processes in five case companies in a copying-intensive industry. The findings reveal that unlike design processes, copying processes lack early conceptual activities. Furthermore, resources and contact with the end market are found to be prerequisites for professional and strategic design processes, whereas a lack of these better suits copying processes, especially in industries with low product variety and limited design problems.
|
|
| 3. |
- Swetha, Annam, et al.
(författare)
-
Design, Analysis and Implementation of Improved Adaptive Fault Tolerant Model for Cruise Control Multiprocessor System
- 2014
-
Ingår i: International Journal of Computer Applications. - Sweden : Foundation of Computer Science. - 0975-8887. ; 86:15, s. 19-26
-
Tidskriftsartikel (refereegranskat)abstract
- Safety or mission critical applications have to recover from an error within an acceptable time window or it may potentially lead to disastrous effects or higher costs. The usual industrial practice is to employ fault tolerance using hardware redundancy where costs are highly exorbitant depending on the mission. In this paper, we present a framework for adaptive fault tolerance on the commonly used hardware redundancy. This proposed model gives enhanced resource management and improved system performance under normal runtime and provides minimal safe functionality under error conditions. A new scheduling method, a combination of dynamic planning and dynamic best effort approach has been designed for joint scheduling of periodic and aperiodic tasks which also include online reconfiguration for error management. This fault recovery technique allows all critical tasks to meet their deadlines and the system continues functioning with minimal safe functionality upon errors. This model has been analyzed and evaluated on a practical case study of a Cruise Control System vis- à-vis a traditional redundancy scheme with simulation and validated with appropriate performance metrics. The results demonstrate the high performance throughput and process speedup (Execution time of process) that can be gained by applying this model to an m-processor redundancy model and the advantages can be accrued specially in the field of avionics in terms of fuel/weight ratio.
|
|
