Lower Bounds, Michael B. Pursley, Dilip Tr Sarwate, Senior Member, Wayne E. Stark, Student Member
Absrract-Upper and lower bounds on the average probability of error are obtained for direct-sequence spread-spectrum multipleaccess communications systems with additive white Gaussian noise channels....
Lower Bounds, Michael B. Pursley, Dilip Tr Sarwate, Senior Member, Wayne E. Stark, Student Member
Absrract-Upper and lower bounds on the average probability of error are obtained for direct-sequence spread-spectrum multipleaccess communications systems with additive white Gaussian noise channels....
Blind channel identification for direct-sequence spread-spectrum systems (2007)
Dennis L. Goeckel, Wayne E. Stark
Channel identification for a binary phase-shift keyed (BPSK) direct-sequence spread-spectrum (DS/SS) system operating over a fading channel with sampling at the chip rate is considered in this work....
Adaptive Coding and Modulation for Spread-Spectrum Signals (2007)
Abstract: In this paper we consider coding and modulation schemes for direct-sequence spread-spectrum (DS-SS) systems with multiple-access (MA) interference in a fading environment. Our goal is to be...
On iterative receivers for non-coherent channels (2007)
Andrew P. Worthen, Wayne E. Stark
It is well-known that optimal receivers for many wireless communication systems employ joint channel estimation and decoding. Since this is almost always too computationally complex, we consider...
Dennis Goeckel And, Dennis L. Goeckel, Wayne E. Stark
: In this paper, we present a class of multicarrier systems for studying the effect of the method of diversity allocation on coherent multi-user communication system performance over fading channels....
Michael J. Chu, Wayne E. Stark
: In this paper, we present an analytical model to determine the probability of error for a communication system as a function of mobile velocity. We investigate the performance of a system model...
Low Power Parallel Multiplier Design for DSP Applications Through Coefficient Optimization (2007)
Suhwan Kim Sangjin, Sangjin Hong, Marios C. Papaefthymiou, Wayne E. Stark
Digital Signal Processing (DSP) often involves multiplications with a set of coefficients. This paper presents a novel multiplier design methodology for performing these coefficient multiplications...
Sangjin Hong, Riten Gupta, Wayne E. Stark, Alfred O. Hero
A high data rate multi-carrier receiver employing orthogonal frequency division multiplexing (OFDM) for mobile communications requires joint low-power VLSI design optimization of the channel...
Dennis L. Goeckel, Wayne E. Stark
: In this paper, we present a class of multicarrier systems for studying the effect of the method of diversity allocation on coherent multi-user communication system performance over fading channels....
Optimal Diversity Allocation in Coherent Multiuser Systems (2007)
Dennis L. Goeckel, Wayne E. Stark
this paper, it is assumed that each user in the system is employing a two-level concatenated coding system. The inner code will be a low complexity soft-decision decoded code whereas the outer code...
ARTICLE NO. 0023 Cryptographic Key Agreement for Mobile Radio (2007)
Amer A. Hassan, Wayne E. Stark, John E. Hershey
The problem of establishing a mutually held secret cryptographic key using a radio channel is addressed. The performance of a particular key distribution system is evaluated for a practical mobile...
Dennis L. Goeckel, Alfred O. Hero, Wayne E. Stark
Abstract — Data-recursive algorithms are presented for performing blind channel identification in oversampled communication systems. Novel on-line solutions with complexities that are only linear...
Dennis L. Goeckel, Wayne E. Stark, Dennis Goeckel, Alfred O. Hero, Iii Wayne, ...
Algorithms for performing blind channel identification for a binary phase-shift keyed (BPSK) direct-sequence spread-spectrum (DS/SS) system operating over a fading channel are presented. These...
Abdulrauf Hafeez, Wayne E. Stark
Abstract-- Decision feedback sequence estimation (DFSE), which is a reducedcomplexity alternative to maximum likelihood sequence estimation, can be used effectively for equalization of inter-symbol...
Characterization of WSSUS Channels: Normalized Mean Square Covariance (2007)
Abstract — A set of second order statistics collectively called normalized mean square covariance (NMSV) is defined to characterize the frequency and/or the time selectivity of wide-sense...
Normalized mean square covariance and diversity combining (2007)
Abstract — In this letter, we investigate the fundamental relationship between the performance of a maximum ratio diversity combining scheme and the normalized mean square covariance (NMSV) under...
Characterization of Multipath Fading Channels: (2007)
Channels With Specular, Do-sik Yoo, Wayne E Stark
A set of parameters collectively called re-centered (RC) normalized mean square correlation (NMSR) is introduced to characterize the quality of multipath fading channels with non-zero specular...
Energy-delay analysis of MAC protocols in wireless networks (2005)
Shih Yu Chang, Wayne E. Stark, Achilleas Anastasopoulos
In this paper the tradeoff between energy and delay for wireless networks is studied. A network using a request-to-send (RTS) and clear-to-send (CTS) type medium access control (MAC) protocol is...
Energy-delay analysis of MAC protocols in wireless networks (2005)
Shih Yu Chang, Wayne E. Stark, Achilleas Anastasopoulos
In this paper the tradeoff between energy and delay for wireless networks is studied. A network using a request-to-send (RTS) and clear-to-send (CTS) type medium access control (MAC) protocol is...
Stochastic Degree of Freedom And WSSUS Channel Diversity (2003)
Wayne E. Stark, Do-sik Yoo, Do-sik Yoo
In this letter, the concept of stochastic degree of freedom (SDF) is introduced as the dual concept of normalized mean square covariance (NMSV) for general L stochastic processes. We consider the...
Performance of Ultra-Wideband Communications with Suboptimal Receivers in Multipath Channels (2002)
John D. Choi, Student Member, Wayne E. Stark
The performance of a single-user ultra-wideband (UWB) communication system employing binary block-coded pulse-position modulation (PPM) and suboptimal receivers in multipath channels is considered....
Performance Limits of M-FSK With Reed-Solomon Coding and Diversity Combining (2002)
John D. Choi, Do-sik Yoo, Student Member, Student Member, Wayne E. Stark
This paper examines the asymptotic ( ) performance of-ary frequency-shift keying (M-FSK) in multichannels, or multiple frequency-nonselective, slowly fading channels, with coding, side information,...
Low-power Application-specific Parallel Array Multiplier Design for DSP Applications (2002)
Sangjin Hong, Suhwan Kim, Wayne E. Stark
Digital Signal Processing (DSP) often involves multiplications with a fixed set of coefficients. This paper presents a novel multiplier design methodology for performing these coefficient...
Unified design of iterative receivers using factor graphs (2001)
Andrew P. Worthen, Wayne E. Stark
Abstract — Iterative algorithms are an attractive approach to approximating optimal, but high-complexity, joint channel estimation and decoding receivers for communication systems. We present a...
Interference Cancellation for Multirate Multiuser Systems (2001)
Multistage successive interference cancellation (SIC) and multistage parallel interference cancellation (PIC) are compared under two different realistic dual rate asynchronous DS-CDMA schemes. The...
Hong, Sangjin, Stark, Wayne E.
Channel coding is commonly incorporated to obtain sufficient reception quality in wireless mobile communications transceiver to counter channel degradation due to intersymbol interference, multipath...
Effect of mobile velocity on communications in fading channels (2000)
Michael J. Chu, Student Member, Wayne E. Stark
Abstract—In a fading channel, it is well known that the rate of channel variation is dependent on the velocity of the mobile. Consequently, depending on the channel correlation, successive symbols...
Nonlinear Amplifier Effects in Communications Systems (1999)
Cheng-po Liang, Je-hong Jong, Student Member, Student Member, Wayne E. Stark, Jack R. East
Abstract — This paper introduces a figure-of-merit to investigate tradeoffs between amplifiers and modulation waveforms in complex digital communications systems. Class-AB amplifiers are...
Optimal diversity allocation in multiuser communication systems—Part I: System model (1999)
Dennis L. Goeckel, Wayne E. Stark
Abstract—In Part I of this paper, a class of multicarrier systems was proposed to study the effect of the method of diversity allocation on the performance of coherent multiuser communication...
Optimal diversity allocation in multiuser communication systems—Part I: System model (1999)
Dennis L. Goeckel, Wayne E. Stark
Abstract—A class of multiuser multicarrier communication systems is introduced to study the influence of resource allocation on the performance of multiuser communication systems operating over...
Performance Optimization of VLSI Transceivers for Low-Energy Communications Systems (1999)
Andrew Worthen Sangjin, Sangjin Hong, Riten Gupta, Wayne E. Stark
Design of low-energy communications systems requires attention to power consumption in the overall system design and the algorithm implementations. We consider design of a communications system...
Sangjin Hong Suhwan, Sangjin Hong, Suhwan Kim, Marios C. Papaefthymiou, Wayne E. Stark
Large fixed-throughput fast Fourier transform (FFT) modules are used in multi-carrier spread spectrum receiver design for demodulation and synchronization. The power dissipation of an FFT module...
Iterative Estimation And Decoding For Channels With Memory (1999)
Joseph Hyukjoon Kang, Joseph Hyukjoon Kang, Chair Professor, Wayne E. Stark
ITERATIVE ESTIMATION AND DECODING FOR CHANNELS WITH MEMORY by Joseph Hyukjoon Kang Chair: Professor Wayne E. Stark In this thesis, iterative estimation and decoding techniques are considered for...
Optimal Diversity Allocation in Multi-User Communication Systems - Part II: Optimization (1999)
Dennis L. Goeckel, Dennis Goeckel, Wayne E. Stark, Wayne E. Stark
In Part I [1] of this paper, a class of multicarrier systems was proposed to study the effect of the method of diversity allocation on the performance of coherent multi-user communication systems...
Pursley,Michael B., Sarwate,Dilip V., Stark,Wayne E.
See also Part 2, AD-A118 305.
Stochastic Control of Ad Hoc Communication Networks (1998)
Stark, Wayne E., Wasserman, Kimberly
The proposed research had two main purposes. The first was to develop simple, adaptive, and distributed energy control (transmission power and transmission rate control) algorithms that (i) control...
Turbo Codes for Noncoherent FH-SS With Partial Band Interference (1998)
Joseph H. Kang, Student Member, Wayne E. Stark
Abstract—In this paper, turbo codes are investigated in a slow frequency-hopped spread spectrum (FH-SS) system with partialband jamming. In addition, full-band thermal noise is present. The channel...
Turbo codes for fading and burst channels (1998)
Joseph H. Kang, Wayne E. Stark, Alfred O. Hero
In this paper, turbo codes are investigated in fading and burst channels. In particular, we consider the design and performance of turbo codes for a GilbertElliot burst channel and in a realistic...
Performance of turbo-coded FH-SS with partial-band interference and Rayleigh fading (1998)
Joseph H. Kang, Wayne E. Stark
In this paper, we investigate the performance of turbo codes when applied to a frequency hopped spread spectrum system with partial-band interference, full-band thermal noise, and Rayleigh fading. We...
Turbo Codes for Noncoherent FH-SS With Partial Band Interference (1998)
Joseph H. Kang, Student Member, Wayne E. Stark
Abstract--- In this paper, turbo codes are investigated in a slow frequency-hopped spread spectrum (FH-SS) system with partial-band jamming. In addition, full-band thermal noise is present. The...
Michael J. Chu, Wayne E. Stark
It is well known that a communication system using M-ary orthogonal signaling in additive white Gaussian noise can achieve capacity. However, in a worst case partial band jamming channel, orthogonal...
Low-Density Parity Check Codes for Fading Channels with Memory (1998)
Andrew P. Worthen, Wayne E. Stark
We develop a belief-propagation-based joint decoding and channel state estimation algorithm for low-density parity check codes on fading channels with memory. The excellent empirical performance of...
Turbo Codes for Noncoherent FH-SS with Partial Band Interference (1998)
Joseph H. Kang, Wayne E. Stark
In this paper, turbo codes are investigated in a slow frequency-hopped spread spectrum (FH-SS) system with partial-band jamming. In addition, full-band thermal noise is present. The channel model is...
Turbo codes for coherent fh-ss with partial band interference (1997)
Joseph H. Kang, Wayne E. Stark
In this paper, turbo codes are investigated in a slow frequency-hopped spread spectrum (FH-SS) system with partial-band jamming. In addition, full-band thermal noise is present. This paper focuses on...
Soft-Output Multiuser Estimation for Asynchronous CDMA Channels (1997)
Abdulrauf Hafeez, Wayne E. Stark
: In this paper, we consider several multiuser demodulation schemes for a direct-sequence code-division multiple access (DS-CDMA) system that provide softoutputs to enhance single-user soft-decision...
Combined decision-feedback multiuser detection/soft-decision decoding for CDMA channels (1996)
Abdulrauf Hafeez, Wayne E. Stark
Abstract--This paper evaluates the performance of decision-feedback multiuser detectors with coding for CDMA channels. A combined multiuser detection/softdecision decoding scheme is proposed which...
Abstract--- In this paper we consider the performance of di#erent coding schemes for DS-SS in a nonselective Rician faded channel. The Nordstrom-Robinson(NR) code, a nonlinear code that has large...
In this paper the performance of different coding schemes for direct-sequence spread-spectrum (DS-SS) with multiple-access (MA) interference in a nonselective Rayleigh fading channel is considered. A...
On the capacity of channels with block memory (1988)
Stark, Wayne E., McEliece, Robert J.
The capacity of channels with block memory is investigated. It is shown that, when the problem is modeled as a game-theoretic problem, the optimum coding and noise distributions when block memory is...
Capacity and cutoff rate of noncoherent FSK with nonselective Rician fading (1985)
Abstract-The capacity and cutoff rate of frequency-shift keying channel capacity. We also examine the “practical limits ” [6] (FSK) modulation and noncoherent reception when the signal is subject...
Channels with block interference (1984)
McEliece, Robert J., Stark, Wayne E.
A new class of channel models with memory is presented in order to study various kinds of interference phenomena. It is shown, among other things, that when all other parameters are held fixed,...
Optimal Diversity Allocation for Multi-User Systems Operating over Jammed Multipath Fading Channels
Dennis L. Goeckel, Wayne E. Stark
: A class of multicarrier systems was defined in [1] to study the effect of the method of bandwidth allocation on coherent multi-user system performance over fading channels. In this paper, we extend...