NDLI: Concatenated Sequences for Spread Spectrum Systems

Content Provider	IEEE Xplore Digital Library
Author	Maskara, S.L. Das, J.
Copyright Year	1965
Abstract	Concatenated sequences are suggested and developed for use in spread spectrum (SS) systems. Special receiver realization is discussed and it is shown that the concatenated sequences offer great advantage in reducing the size of the matched filter correlators (MFC) in the SS receiver. Experimental systems have been built using concatenated sequences and their performance is reported here. It has been shown that a processing gain of 60 is obtainable with a 15 × 4 concatenated sequence which requires three tapped delay lines (TDL), two of length 15 and one of 4. Thus a total of only 34 delay units (with a nonlinear interface network, only 19 delay units) are required. Teleprinter signals can be transmitted over telephone channels using a bandwidth (BW) expansion of 60 with an input signal-to-noise ratio (SNR) of only -5.1 dB, resulting in a character- error-rate of 1 in 103. Techniques have been developed to reduce the sidelobe levels in the aperiodic autocorrelation functions (ACF) of the pseudonoise (PN) codes. For 15 length and 7 length PN sequences, sidelobes are reduced by 9 dB and 9.4 dB, respectively, using transversal filters. Application of the SS systems to the problem of multiaccessing and antijamming are discussed.
Starting Page	342
Ending Page	350
Page Count	9
File Size	2494863
File Format	PDF
ISSN	00189251
Volume Number	AES-17
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1981-05-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Concatenated codes Spread spectrum communication Matched filters Correlators Delay lines Teleprinting Telephony Bandwidth Signal to noise ratio Autocorrelation
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Aerospace Engineering

Sl.	Authority	Responsibilities	Communication Details
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Comments on Concatenated Sequences for Spread Spectrum Systems

A Unified Approach to Serial Search Spread-Spectrum Code Acquisition--Part II: A Matched-Filter Receiver

Detectability of Spread-Spectrum Signals

An Active RC Delay Line for Matched Filters Correlators

Interception of frequency-hopped spread-spectrum signals

Exponential Residue Codes

A new algorithm to optimize Barker code sidelobe suppression filters

Differentially coherent PN code acquisition with full-period correlation in chip-synchronous DS/SS receivers

A differentially coherent PN code acquisition receiver for CDMA systems

Concatenated Sequences for Spread Spectrum Systems

Similar Documents

Comments on Concatenated Sequences for Spread Spectrum Systems

A Unified Approach to Serial Search Spread-Spectrum Code Acquisition--Part II: A Matched-Filter Receiver

Detectability of Spread-Spectrum Signals

An Active RC Delay Line for Matched Filters Correlators

Interception of frequency-hopped spread-spectrum signals

Exponential Residue Codes

A new algorithm to optimize Barker code sidelobe suppression filters

Differentially coherent PN code acquisition with full-period correlation in chip-synchronous DS/SS receivers

A differentially coherent PN code acquisition receiver for CDMA systems

Concatenated Sequences for Spread Spectrum Systems