D. L. Schilling

Atkins (United States)

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i-10 index

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Co-Authors

R.L. Pickholtz

George Washington University

L.B. Milstein

University of California, San Diego

J. Garodnick

InterDigital (United States)

S. Davidovici

Rutgers, The State University of New Jersey

G.R. Lomp

BAE Systems (United States)

F. J. Altman

Cybernet Systems Corporation (United States)

M. Kullback

T-Mobile (United States)

S.S. Rappaport

Stony Brook University

T. Apelewicz

City University of New York

N. Scheinberg

City University of New York

Cooperative Institutions

Institute of Electrical and Electronics Engineers

House of Representatives

DirecTV (United States)

City College of New York

Association Clinique et Thérapeutique Infantile du Val de Marne

City University of New York

AT&T (United States)

City College

Nokia (United States)

InterDigital (United States)

Author Statistics

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On the feasibility of a CDMA overlay for personal communications networks

IEEE Journal on Selected Areas in Communications (1992)

L.B. Milstein D. L. Schilling R.L. Pickholtz V. Erceg M. Kullback

Because of the continually increasing demand for mobile communications, it has been suggested that personal communication networks (PCNs) be established in the 1850-1990 MHz range. However, that band of frequencies is currently occupied by various microwave signals transmitted by users ranging from utility companies to state and local agencies. In order to allow both sets of users to occupy these frequencies as well as improve the spectral efficiency of this band, a spread-spectrum overlay is proposed, whereby a code-division multiple-access (CDMA) PCN would share the spectral band with the existing narrowband microwave traffic. The results of several field tests which have been designed to demonstrate the feasibility of an overlay of this type are discussed.< >

Narrowband

Spectral Efficiency

Radio spectrum

10.1109/49.136061

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Citations (260)

A Simple Algorithm for Delta Modulators with Delayed Decision

Erlan H. Feria N. Scheinberg J. Barba D. L. Schilling

Several different adaptive delta modulator (ADM) algorithms have been described in the literature over the past 15 years. Researchers [1] and [2] have shown that the performance of these algorithms can be improved by using "look ahead encoding" (also referred to as "delayed decision encoding"). In this paper we will present a general technique that can be used with any of these algorithms to effect a one stage look ahead. The technique presented in this paper has the advantage that it does not require the calculation of two encoding paths nor does it require the decision circuitry to choose the optimum path that minimizes a mean square error or absolute error criterion.

10.1109/milcom.1984.4794906

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Citations (1)

Optimization of the Processing Gain of an FSK-FH System

IRE Transactions on Communications Systems (1980)

L.B. Milstein R.L. Pickholtz D. L. Schilling

It is desired to determine the performance of a noncoherent FSK frequency-hopped spread spectrum communication system using MARK and SPACE tones which are not necessarily orthogonal, and in addition using an error-correction code to reduce the susceptibility of the system to jammer-induced errors. The overall bandwidth of the system (i.e., the spread bandwidth) will be held constant so that the processing gain of the system will always be adjusted to maintain this constant bandwidth as other factors (e.g., the bandwidth expansion due to the error correction coding) change the underlying baseband bandwidth.

Frequency-shift keying

Process gain

10.1109/tcom.1980.1094750

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Citations (39)

A technique for correcting transmission errors in delta modulation channels

International Conference on Communications (1974)

Mudassar Ali N. Scheinberg D. L. Schilling Iván Paz

The delta modulator is a relatively new device which has found wide application in voice encoding. Two main difficulties in using this device for video encoding and processing is that it slope overloads and 'rings' and that channel errors produce a DC level shift. An algorithm is developed which is easily implemented and which significantly reduces 'picture streaks' due to the production of DC level shifts by channel errors. The algorithm can be made adaptive whereby the insertion rate of the pulse code modulation (PCM) codeword needed for correction can be adjusted depending on the strength of the channel noise. This yields a more efficient use of bandwidth. Further, the resulting signal can still be processed further using line-to-line correlation to remove the remaining 'streaks'.

Modulation (music)

Delta modulation

Pulse-code modulation

SIGNAL (programming language)

Source

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Citations (0)

Newsletter Staff 1971

E. J. Glenner H. J. Crowley Martin Marrietta Corp J. J. Stiffler R. M. Mattern

Source

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President's message [IEEE Communications Society delegation to visit industrial plants and universities in China]

IEEE Communications Magazine (1980)

D. L. Schilling

United States members of the Communications Society are invited to join a ComSoc delegation currently being formed to visit the People's Republic of China. Tentative plans are to visit in May 1981. The trip duration will require two weeks in China. A two-three day stopover visit to several Japanese companies is also being organized.

Delegation

Join (topology)

10.1109/mcom.1980.1090279

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Citations (0)

A Comparison of Strategies for Serial Acquisition of Frequency Hopped Spread Spectrum Signals

Constant A. J. Putman S.S. Rappaport D. L. Schilling

The method of serial search for coarse acquisition of frequency hopped spread spectrum signals is investigated from a practical aspect. A convenient method for deriving acquisition time statistics is outlined. Search performance is optimized for minimum acquisition time by comparing search techniques and strategies, and by observing the effect of adverse environments.

10.1109/milcom.1983.4794793

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Citations (4)

Projection codes-a new class of FEC, burst correction and ARQ codes for mobile radio

G.R. Lomp D. Manela D. L. Schilling

The codes presented, which are majority-logic decodable, are created by simple geometric constructions. An iterative decoding scheme is given. The decoder differs significantly from bounded distance decoders commonly used for decoding block codes in that many error patterns having weight greater than the code minimum distance are correctable. This feature contributes to the codes' high efficiency in an automatic-repeat-request (ARQ) system. The decoding algorithm is also capable of burst error correction, and of detecting decoding faults, so that many patterns not correctable may be so indicated to the data sink. Although the code structure is essentially geometric, codes also have an algebraic structure that permits them to be used with classical algebraic codes, especially cyclic codes. The codes discussed can use encoder and decoder functions based entirely on shift registers.< >

List decoding

Raptor code

10.1109/icc.1988.13609

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Citations (2)

The FAVR meteor burst communication experiment

D. L. Schilling T. Apelewicz G.R. Lomp M. Dyer L.A. Lundberg

The authors describe the meteor burst communications experiment performed by SCS Telecom, Martin Marietta Energy Systems, and the 11th Air Force. The experiment consisted of transmitting data and voice over a meteor burst channel between Anchorage and Kotzebue using SCS Telecom's FAVR modem. The FAVR algorithm is described. It is a variable rate modem capable of operating at bit rates up to 92 kbit/s using a 40-kHz bandwidth. Forward error correction, trellis decoding, and nonlinear equalization are used. Simulation and experimental results are shown and compared.< >

Fade

Burst error

10.1109/milcom.1991.258343

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Citations (1)

Delta Modulators in Packet Voice Networks

IEEE Transactions on Communications (1980)

V. R. Dhadesugoor C. Ziegler D. L. Schilling

In this paper, the performances of the Song Voice Adaptive Delta Modulator (SVADM) and the Continuously Variable Slope Delta Modulator (CVSD) in terms of dynamic range, sampling rate and the channel errors are compared. The use of the SVADM and the CVSD in a packet voice system, the algorithms for digital detection of silent periods and the performance of a packet voice system using the SVADM and the CVSD as source encoders are presented. The parameters employed for subjective evaluation of the packet voice system are packet size, silence detection algorithm, bit rate and packet loss rate.

Delta modulation

Fast packet switching

Packet Switching

Packet analyzer

Packet loss

10.1109/tcom.1980.1094565

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Citations (24)