Study of the impact of pulse shaping on the performance of spatial modulation

2017 ◽  
Author(s):  
Carlos Aurelio Faria da Rocha ◽  
Bartolomeu F. Uchoa-Filho ◽  
Didier Le Ruyet
Keyword(s):  
Pulse Shaping ◽  
Spatial Modulation ◽  
The Impact

scholarly journals The impact of vlogging on deaf culture, communication and identity

2021 ◽  
Author(s):  
Ellen S. Hibbard
Keyword(s):  
American Sign Language ◽  
Sign Language ◽  
Asynchronous Communication ◽  
Deaf Culture ◽  
Spatial Modulation ◽  
Online Video ◽  
Deaf People ◽  
Structured Interviews ◽  
The Impact ◽  
Culture And Communication

This thesis presents a framework representing research conducted to examine the impact of website based online video technology for Deaf people, their culture, and their communication. This technology enables American Sign Language (ASL) asynchronous communication, called vlogging, for Deaf people. The thesis provides new insights and implications for Deaf culture and communication as a result of studying the practices, opinions and attitudes of vlogging. Typical asynchronous communication media such as blogs, books, e-mails, or movies have been dependent on use of spoken language or text, not incorporating sign language content. Online video and website technologies make it possible for Deaf people to share signed content through video blogs (vlogs), and to have a permanent record of that content. Signed content is typically 3-D, shared during face-to-face gatherings, and ephemeral in nature. Websites are typically textual and video display is 2-D, placing constraints on the spatial modulation required for ASL communication. There have been few academic studies to date examining signed asynchronous communication use by Deaf people and the implications for Deaf culture and communication. In this research, 130 vlogs by Deaf vloggers on the mainstream website YouTube, and specialized website Deafvideo.TV were examined to discover strategies employed by Deaf users as a result of the technology’s spatial limitations, and to explore similarities and differences between the two websites. Semi-structured interviews were conducted with 26 Deaf people as follow up. The main findings from this research include register of vlogging formality depending on website type, informal on Deafvideo.TV while formal on YouTube. In addition, vlogs had flaming behaviour while unexpected findings of lack of ASL literature and use of technical elements that obscured ASL content in vlogs. Questions regarding the space changes and narrative elements observed have arisen, providing avenues for additional research. This study and more research could lead to a fuller understanding the impact of vlogging and vlogging technology on Deaf culture and identify potential improvements or new services that could offered.

scholarly journals Reducing the Cost of Implementing Filters in LoRa Devices

Sensors ◽  
2019 ◽  
Vol 19 (18) ◽  
pp. 4037
Author(s):  
Shania Stewart ◽  
Ha H. Nguyen ◽  
Robert Barton ◽  
Jerome Henry
Keyword(s):  
Fourier Transform ◽  
Fast Fourier Transform ◽  
System Performance ◽  
Pulse Shaping ◽  
Error Rates ◽  
Lookup Table ◽  
Significant Performance ◽  
High Level ◽  
The Cost ◽  
The Impact

This paper presents two methods to optimize LoRa (Low-Power Long-Range) devices so that implementing multiplier-less pulse shaping filters is more economical. Basic chirp waveforms can be generated more efficiently using the method of chirp segmentation so that only a quarter of the samples needs to be stored in the ROM. Quantization can also be applied to the basic chirp samples in order to reduce the number of unique input values to the filter, which in turn reduces the size of the lookup table for multiplier-less filter implementation. Various tests were performed on a simulated LoRa system in order to evaluate the impact of the quantization error on the system performance. By examining the occupied bandwidth, fast Fourier transform used for symbol demodulation, and bit-error rates, it is shown that even performing a high level of quantization does not cause significant performance degradation. Therefore, the memory requirements of LoRa devices can be significantly reduced by using the methods of chirp segmentation and quantization so as to improve the feasibility of implementing multiplier-less filters in LoRa devices.

scholarly journals The impact of vlogging on deaf culture, communication and identity

2021 ◽  
Author(s):  
Ellen S. Hibbard
Keyword(s):  
American Sign Language ◽  
Sign Language ◽  
Asynchronous Communication ◽  
Deaf Culture ◽  
Spatial Modulation ◽  
Online Video ◽  
Deaf People ◽  
Structured Interviews ◽  
The Impact ◽  
Culture And Communication

This thesis presents a framework representing research conducted to examine the impact of website based online video technology for Deaf people, their culture, and their communication. This technology enables American Sign Language (ASL) asynchronous communication, called vlogging, for Deaf people. The thesis provides new insights and implications for Deaf culture and communication as a result of studying the practices, opinions and attitudes of vlogging. Typical asynchronous communication media such as blogs, books, e-mails, or movies have been dependent on use of spoken language or text, not incorporating sign language content. Online video and website technologies make it possible for Deaf people to share signed content through video blogs (vlogs), and to have a permanent record of that content. Signed content is typically 3-D, shared during face-to-face gatherings, and ephemeral in nature. Websites are typically textual and video display is 2-D, placing constraints on the spatial modulation required for ASL communication. There have been few academic studies to date examining signed asynchronous communication use by Deaf people and the implications for Deaf culture and communication. In this research, 130 vlogs by Deaf vloggers on the mainstream website YouTube, and specialized website Deafvideo.TV were examined to discover strategies employed by Deaf users as a result of the technology’s spatial limitations, and to explore similarities and differences between the two websites. Semi-structured interviews were conducted with 26 Deaf people as follow up. The main findings from this research include register of vlogging formality depending on website type, informal on Deafvideo.TV while formal on YouTube. In addition, vlogs had flaming behaviour while unexpected findings of lack of ASL literature and use of technical elements that obscured ASL content in vlogs. Questions regarding the space changes and narrative elements observed have arisen, providing avenues for additional research. This study and more research could lead to a fuller understanding the impact of vlogging and vlogging technology on Deaf culture and identify potential improvements or new services that could offered.

scholarly journals The Impact of Antenna Switching Time on Spatial Modulation

2016 ◽  
Vol 5 (3) ◽  
pp. 256-259 ◽  
Author(s):  
Ebrahim Soujeri ◽  
Georges Kaddoum
Keyword(s):  
Switching Time ◽  
Spatial Modulation ◽  
The Impact
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