T. Hämäläinen

Publications519
h-index35
Citations6,501
Highly Influential Citations369
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Design and Implementation of Low-Area and Low-Power AES Encryption Hardware Core
TLDR
In this paper we present an AES encryption hardware core suited for devices in which low cost and low power consumption are desired. Expand
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Experiments on local positioning with Bluetooth
TLDR
This paper presents the design and implementation of the Bluetooth local positioning application. Expand
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Ensuring the QoS requirements in 802.16 scheduling
TLDR
We propose a simple, yet efficient, solution for the WiMAX base station that is capable of allocating slots based on the QoS requirements, bandwidth request sizes, and WiMAX network parameters. Expand
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Performance analysis of IEEE 802.15.4 and ZigBee for large-scale wireless sensor network applications
TLDR
This paper analyses the performance of IEEE 802.15.4 Low-Rate Wireless Personal Area Network (LRWPAN) in a large-scale Wireless Sensor Network (WSN) application. Expand
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  • PDF
Scheduling solution for the IEEE 802.16 base station
TLDR
We propose a simple, yet efficient, solution that is capable of allocating slots based on the QoS requirements, bandwidth request sizes, and the 802.16 network parameters. Expand
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A High-Performance Sum of Absolute Difference Implementation for Motion Estimation
TLDR
This paper presents a high-performance sum of absolute difference (SAD) architecture for motion estimation, which is the most time-consuming and compute-intensive part of video coding. Expand
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Positioning with IEEE 802.11b wireless LAN
TLDR
This paper presents the design and implementation of a local positioning prototype that implements received signal power level based positioning on IEEE 802.11b wireless LAN (WLAN) platform. Expand
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A Survey of Application Distribution in Wireless Sensor Networks
TLDR
In this paper, we focus on four essential distribution aspects in WSNs, namely, service discovery, task allocation, remote task communication, and task migration. Expand
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Robust regulation of distributed parameter systems with infinite-dimensional exosystems
TLDR
A feedback controller which robustly regulates the class of signals generated by the exosystem and strongly or weakly stabilizes the closed-loop system has been constructed. Expand
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Comparative Rate-Distortion-Complexity Analysis of HEVC and AVC Video Codecs
TLDR
This paper analyzes the rate-distortion-complexity of High Efficiency Video Coding (HEVC) reference video codec (HM) and compares the results with AVC reference codec (JM) and provides implementation guidelines for future real-time HEVC codecs. Expand
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