NDLI: DADS with short spreading sequences for high data rate communications or improved BER performance

Content Provider	IEEE Xplore Digital Library
Author	Le Nir, V. Scheers, B.
Copyright Year	2013
Description	Author affiliation: Dept. Commun., Inf. Syst. & Sensors (CISS), Brussels, Belgium (Le Nir, V.; Scheers, B.)
Abstract	In this paper, a method is proposed to improve the performance of the delay and add direct sequence (DADS) modulation scheme. On one hand, the selection of a short pseudonoise (PN) sequence is used to improve the data rate performance. On the other hand, when high data rates are not required, the same short PN sequence is replicated to form a long PN sequence. In this case, noise reduction by averaging is used to improve the bit error rate (BER) for high spreading factors. Theoretical BER formulas are derived and verified by simulations in additive white Gaussian noise (AWGN) and frequency selective Rayleigh channels. The proposed DADS modulation scheme is implemented using the CogWave software to allow the exchange of video, audio and text between two USRPs through a graphical user interface (GUI) developed in Qt4.
Starting Page	1
Ending Page	8
File Size	434792
Page Count	8
File Format	PDF
e-ISBN	9788393484843
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-10-07
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Military University of Technology
Subject Keyword	AWGN channels Frequency modulation Bit error rate Noise Noise reduction Noncoherent detection Transmit reference Delays Spread spectrum modulation scheme
Content Type	Text
Resource Type	Article

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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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