Ahmet T. Erdogan

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Recent development of Wireless Sensor Networks (WSN) has led to the appearance of many application specific communication protocols which must be energy-efficient. Among those protocols developed for WSN, LEACH (Low Energy Adaptive Clustering Hierarchy) protocol is one of the most promising protocols. In this paper, a novel self-organizing energy efficient(More)
There is a high demand for low power and efficient implementation of complex arithmetic operations in many digital signal processing (DSP) algorithms. The CORDIC algorithm is suitable to be implemented in DSP systems since its calculation for complex arithmetic is simple and elegant. However, the large number of iterations involved in CORDIC operation(More)
This paper presents a method to reduce the computation and memory access for variable block size motion estimation (ME) using pixel truncation. Previous work has focused on implementing pixel truncation using a fixed-blocksize (16×16 pixels) ME. However, pixel truncation fails to give satisfactory results for smaller block partitions. In this paper, we(More)
K-means clustering has been widely used in processing large datasets in many fields of studies. Advancement in many data collection techniques has been generating enormous amount of data, leaving scientists with the challenging task of processing them. Using General Purpose Processors or GPPs to process large datasets may take a long time, therefore many(More)
The authors present a multiplication algorithm for low power implementation of digital filters on CMOS based digital signal processing systems. The algorithm decomposes individual coefficients into two primitive sub-components. The decomposition, performed using a heuristic approach, divides a given coefficient such that a part is produced which can be(More)
Interwire coupling is a major source of power consumption and delay faults for on-chip buses implemented in UDSM SoC systems. Elimination or minimization of such faults is crucial to the performance and reliability of SoC designs. This paper presents a new on-chip bus encoding scheme targeting high performance generic SoC systems. In addition to its(More)
WIMAX signal throughput and area coverage range are the most important factors that will affect the quality of broadband access services in mobile systems. This paper presents a comprehensive study of frequency analysis for path loss on mobile WIMAX presented to achieve large throughput and wide coverage to a big number of users. In this paper we have(More)