NDLI: Hybrid Digital-Analog transmission taking into account D/A and A/D conversion

Content Provider	IEEE Xplore Digital Library
Author	Rungeler, M. Vary, P.
Copyright Year	2015
Description	Author affiliation: Inst. of Commun. Syst. & Data Process. (ind), RWTH Aachen Univ., Aachen, Germany (Rungeler, M.; Vary, P.)
Abstract	Efficient digital transmission of continuous-amplitude signals requires source coding which comes at the price of unavoidable quantization errors. Thus, even in clear channel conditions, the quality of the decoded signal is limited due to these source coding errors (quantization). Hybrid Digital-Analog (HDA) codes circumvent this limitation by additionally transmitting the source coding error with quasi-analog methods (discrete-time, quasi-continuous-amplitude) with neither increasing the total transmission power, nor the occupied frequency bandwidth on the radio channel. So far, for HDA transmission, the potential distortion additionally introduced by D/A and A/D conversion of the analog signal has not been considered. In this paper, the effect of clipping and limited resolution of this conversion on the performance of HDA transmission is evaluated. For random variables and speech signals, simulations verify that even with poor A/D and D/A conversion (3 bit resolution) the HDA concept outperforms conventional purely digital transmission systems at all channel qualities while additionally eliminating the quality limitation effect.
Starting Page	590
Ending Page	594
File Size	350002
Page Count	5
File Format	PDF
e-ISBN	9781479919314
DOI	10.1109/SPAWC.2015.7227106
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-06-28
Publisher Place	Sweden
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Quantization (signal) Receivers Distortion Noise Transmitters Speech Encoding clipping and limited resolution of A/D and D/A converters Hybrid Digital-Analog (HDA)
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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