Browsing by Subject "Digital communication"

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Open Access
Design of application specific processors for the cached FFT algorithm
(IEEE, 2006-05) Atak, Oğuzhan; Atalar, Abdullah; Arıkan, Erdal; Ishebabi, H.; Kammler, D.; Ascheid, G.; Meyr, H.; Nicola, M.; Masera, G.
Orthogonal frequency division multiplexing (OFDM) is a data transmission technique which is used in wired and wireless digital communication systems. In this technique, fast Fourier transformation (FFT) and inverse FFT (IFFT) are kernel processing blocks in an OFDM system, and are used for data (de)modulation. OFDM systems are increasingly required to be flexible to accommodate different standards and operation modes, in addition to being energy-efficient. A trade-off between these two conflicting requirements can be achieved by employing application-specific instruction-set processors (ASIPs). In this paper, two ASIP design concepts for the cached FFT algorithm (CFFT) are presented. A reduction in energy dissipation of up to 25% is achieved compared to an ASIP for the widely used Cooley-Tukey FFT algorithm, which was designed by using the same design methodology and technology. Further, a modified CFFT algorithm which enables a better cache utilization is presented. This modification reduces the energy dissipation by up to 10% compared to the original CFFT implementation.
Open Access
Managing pandemic communication online Turkish Ministry of Health’s digital communication strategies during COVID-19
(University of Southern California, 2023) Aksak Özdora, Emel; Dikmen, E. Ş.; Kılıç, N. P.
Health ministries around the world have used online communication, specifically social media platforms, to provide information, communicate warnings to the public, and influence behavior according to recommended health precautions due to the COVID-19 pandemic. Grounded in agenda-setting theory, this study analyzes Turkey’s Ministry of Health’s (MoH) social media communication strategies and practices during COVID-19 through a content analysis of the content shared via its official Twitter, Facebook, and Instagram accounts from February to June 2020, focusing on the first 120 days of the pandemic, when it was at its height. Findings reveal that the MoH’s social media activity was mainly driven by Twitter, and the minister of health has become the face of the fight against the pandemic. Results reveal that the government’s efforts to fight against the virus and its prevention measures are among the most popular themes in online communication. The MoH’s social media communication has shown only limited success in community building and network expansion due to inconsistent and ineffective hashtag use, among other weaknesses in the ministry’s use of social media conventions.