Adriaan De Lind van Wijngaarden

Adriaan De Lind van Wijngaarden
Nokia · Bell Laboratories, Murray Hill, NJ

Dr.-Ing. ir.

About

100
Publications
8,967
Reads
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926
Citations
Additional affiliations
October 1992 - March 1998
University of Duisburg-Essen
Education
October 1992 - March 1998
University of Duisburg-Essen
Field of study
  • Engineering
August 1986 - June 1992
Eindhoven University of Technology
Field of study
  • Electrical Engineering

Publications

Publications (100)
Article
Full-text available
Several optical modulation and detection schemes are compared by computing their spectral efficiencies over additive white Gaussian noise channels. The bandwidth savings of differential quadrature phase-shift keying (D-QPSK) over both direct-detection on-off keying and differential binary phase-shift keying suggest that D-QPSK can improve the reach...
Preprint
Full-text available
Multi-stage learning is an effective technique to invoke multiple deep-learning modules sequentially. This paper applies multi-stage learning to speech enhancement by using a multi-stage structure, where each stage comprises a self-attention (SA) block followed by stacks of temporal convolutional network (TCN) blocks with doubling dilation factors....
Preprint
Speech enhancement techniques that use a generative adver-sarial network (GAN) can effectively suppress noise while allowing models to be trained end-to-end. However, such techniques directly operate on time-domain waveforms, which are often highly-dimensional and require extensive computation. This paper proposes a novel GAN-based speech enhanceme...
Patent
Full-text available
An electrical system comprising a circuit of reconfigurable electrical devices and a controller including a processor. The processor has a configuration examiner and a state modifier. The configuration examiner is configured to determine a configuration for the circuit of reconfigurable electrical devices based upon a connection input. The state mo...
Patent
Full-text available
An electrical device comprising a reconfigurable integrated circuit that includes paired top electrodes and bottom electrodes separated from each other by an active layer.
Article
Full-text available
Traditionally, copper network operators complement a fiber-to-the-home (FTTH) strategy with a hybrid fiber-copper deployment in which fiber is gradually brought closer to the consumer, and digital subscriber line (DSL) technology is used for the remaining copper network. In this article we propose the system concepts of XG-FAST, the 5th generation...
Conference Paper
Full-text available
Traditionally, copper network operators complement a Fiber-to-the-Home (FTTH) strategy with a hybrid fiber-copper deployment in which fiber is gradually brought closer to the consumer, and Digital Subscriber Line (DSL) technology is used for the remaining copper network. In this paper, we propose the system concepts of XG-FAST, a technology capable...
Patent
Full-text available
A method processes a data packet in a first sequence of disjoint original segments of the same length. The method includes modifying a first of the original segments of the first sequence by modifying one or more symbols therein. A start of the data packet is located in the first of the original segments and is positioned after a first digital data...
Article
Full-text available
Energy consumption of customer premises equipment (CPE) has become a serious issue in the new generations of time-division multiplexing passive optical networks, which operate at 10 Gb/s or higher. It is becoming a major factor in global network energy consumption, and it poses problems during emergencies when CPE is battery-operated. In this paper...
Article
Forward error correction (FEC) techniques are essential for optical core and optical access networks. In optical core networks, the emphasis is on high coding gains and extremely low output bit error rates, while allowing decoder realizations to operate at a throughput of 100 Gb/s and above. Optical access networks operate at 10 Gb/s or above and r...
Article
This paper presents a real-time and memory-efficient arrhythmia detection system that uses antidictionary coding for the analysis and classification of electrocardiograms (ECGs). The measured ECG signals are encoded using a lossless antidictionary encoder, and the system subsequently uses the compression rate to distinguish between normal beats and...
Conference Paper
Recent standardization efforts to reduce power consumption in optical access networks include the use of cyclic sleep modes to more effectively scale energy consumption with activity. This paper analyzes a probing-based cyclic sleep mode mechanism that is applied to the downstream of a passive optical network. The analysis studies the effectiveness...
Conference Paper
Abstract-This paper presents an extremely compact, highly efficient hardware implementation of the Reed Solomon (RS) decoder. Such efficiency is of critical importance for the next generation of passive optical networks featuring bit rates of 10 Gb/s, high bit error rates and high cost sensitivity. RS codes are widely used for error correction in o...
Conference Paper
Full-text available
A meshed network with N transport paths can be effectively protected against single link failures using network coding and protection cycles (p-cycles). This so called 1+N protection scheme provides instantaneous recovery from single link failures. The performance of this scheme has thus far been considered for a network with unit traffic demands,...
Article
Full-text available
Digital subscriber line (DSL) data rates for short loops are typically limited by crosstalk between adjacent lines rather than by background noise. Precoding can reduce crosstalk in the downstream from the access node to the customer premises equipment significantly if an accurate estimate of the inverse crosstalk channel is provided. Recently, a b...
Article
Full-text available
Full system demonstration of a FSAN XG-PON2 system, which integrates the medium access control and physical layer incorporating 10 Gbit/s burst mode upstream transmission. A specific challenge addressed was the hardware design of the FEC.
Article
Mobile terminals are rapidly evolving from enhanced phones to powerful platforms capable of offering a multitude of services and critical applications. They have a small form factor and are typically equipped with powerful processors, a large display, a high-resolution camera, and specialized sensors. The hardware has to simultaneously support appl...
Article
Video conferencing is becoming an increasingly desirable alternative to face-to-face meetings. Many companies and organizations have multiple locations, and their employees' communication options are typically limited to audio-only conference calls. These are often ineffective because of the limited level of interaction between the participants. Vi...
Article
Full-text available
The use of trellis-coded modulation (TCM) in combination with an outer block code is considered for next-generation 100-Gb/s optical transmission systems. Two block codes are employed as an outer code: a 16 times interleaved byte-oriented (255,239) Reed Solomon (RS) code and a code consisting of two interleaved extended three-error correcting Bose...
Conference Paper
Recently, the International Telecommunication Union has consented the ITU-T G.993.5 recommendation on vectoring in VDSL2 technology, which specifies the required functionality for interoperability between chipsets of different vendors to achieve vectoring. This paper will briefly review the principles of vectoring and the underlying precoding and c...
Article
The sequence replacement technique converts an input sequence into a constrained sequence in which a prescribed subsequence is forbidden to occur. Several coding algorithms are presented that use this technique for the construction of maximum run-length limited sequences. The proposed algorithms show how all forbidden subsequences can be successive...
Conference Paper
Full-text available
An error-resilient variable-length arithmetic code is presented whose codewords are represented by binary digits. The input sequence is partitioned in subsequences, each of which is individually encoded using an arithmetic coding scheme with an integrated bit-stuffing technique that restricts the number of consecutive ones in the output sequence. A...
Article
RadioStar is a novel system developed by Bell Labs to provide low cost, cellular wireless coverage primarily targeted for enterprises, public spaces, and residences. The underlying concept is to digitize the output radio signals of a base station and to transport these signals over a Gigabit Ethernet network to multiple low-cost radio frequency rad...
Article
Performance results are presented for digital subscriber line (DSL) precoders, also known as dynamic spectrum management (DSM) level 3, in terms of improvement of signal-to-noise ratio (SNR) and achievable bit rates under the very high speed digital subscriber line 2 (VDSL2) standard. Simulations were conducted using channel coefficients obtained f...
Article
A management standard for digital subscriber line (DSL) systems has been defined in order to ensure the spectral compatibility of the signals, services, and technologies that are deployed. Compatibility is typically accomplished by using static spectral masks. This conservative approach may lead to suboptimal performance of DSL systems. Recently, a...
Article
Digital subscriber line (DSL) networks are currently enhanced to provide higher transmission rates and reliability in order to support emerging triple-play services, i.e., voice, video, and data. This is typically achieved by installing digital subscriber line access multiplexers (DSLAMs) in street cabinets to significantly reduce the loop length t...
Conference Paper
Full-text available
Rapid acquisition of accurate crosstalk estimates is a core requirement for effective preceding in digital subscriber line (DSL) systems. It is shown that signal-to-noise ratio (SNR) reports provided by customer premises equipment (CPE) can be used to perform this task by "tuning" the precoder, i.e., iterating alternate steps of estimation and prec...
Conference Paper
Integer codes, defined over integer rings, allow the correction of single cross errors with distance 1 in a signal point constellation on a two-dimensional lattice. Several construction methods support the construction of integer codes that give constellations that have a variety of shapes. In this paper, we characterize all constellations that can...
Article
The terrestrial digital video broadcast (DVB-T) system, specified in the ETSI 300-744 standard, is currently the most popular digital television system with more than 120 million receivers deployed globally in integrated television sets, set-top boxes, in-car modules, universal serial bus (USB) sticks, and personal computer (PC) cards. A provider o...
Conference Paper
We consider the class of integer codes that are capable of correcting single errors in a two-dimensional lattice (H. Morita et al., 2003). Integer codes, defined over integer rings, allow the correction of single errors with distance 1. In this paper, we extend our previous results (H. Morita et al., 2003). We will detail the derivation of an upper...
Conference Paper
We demonstrate that distributed fast polarization scramblers in a differential phase-shift keying transmission system with an enhanced forward error correction code outperforms the standard Reed-Solomon code and improves the polarization-mode dispersion tolerance by 140%.
Conference Paper
A new class of DC-free codes of odd length is presented. The new codes, related to polarity-switch (PS) codes, make use of a redefinition of the running digital sum. The spectral efficiency of the new codes is determined, and it is shown that they provide better power suppression in the low-frequency region than classical PS codes
Article
We experimentally demonstrate broad-band mitigation of polarization-mode dispersion (PMD) in the presence of polarization-dependent loss (PDL) by using distributed fast polarization scramblers in systems adopting forward-error correction. The combined penalty of PMD and PDL is smaller than the sum of the individual penalties, which shows the robust...
Conference Paper
A methodology is presented to predict the frame error rate (FER) in wireless links for a wide range of channel conditions and retransmission strategies. This method measures the variations in signal amplitude and noise variance within a frame and applies a convex metric based on Shannon's capacity formula to account for Doppler penalties and divers...
Article
We study the performance of a novel multichannel polarization-mode dispersion (PMD) mitigation scheme in which forward error correction is utilized with distributed fast polarization scramblers to physically change the PMD of an optical link within each burst-error-correction period. It is shown numerically that the proposed scheme dramatically red...
Conference Paper
Modern high-speed optical transmission systems rely heavily on forward error control (FEC) codes to provide quasi error-free transmission over optical channels. The ITU recommendations G.709 and G.975 that underly current optical systems prescribe the use of an FEC code of length 32640 that consists of 16 interleaved 8-error correcting [255,239] Re...
Conference Paper
Full-text available
Guided scrambling is a coding technique that generates for each possible source word a fixed set of candidate code words and subsequently selects the "best" word subject to given channel constraints. The resulting codes are often referred to as "weak" constraint codes because they do not strictly guarantee that the specified constraints will be ful...
Conference Paper
We propose a multichannel PMD mitigation scheme using forward-error-correction (FEC) and distributed fast polarization scramblers that randomize PMD during each FEC burst-error-correcting-period. Numerical evaluations show substantial improvement in PMD tolerance and reduction in outage probability.
Article
Guided scrambling generates for each possible source word a unique set of candidate codewords and selects the "best" word subject to certain given channel constraints. This is an effective technique to generate long and highly efficient codes that satisfy the given channel constraints with high probability. These codes are referred to as weak const...
Conference Paper
Methods are developed to effectively combine guided scrambling and maximum run-length limited codes in order to impose a guaranteed maximum run-length constraint. It will be demonstrated that the combination of guided scrambling and a well-chosen maximum run-length limited code may offer a sound trade-off between overall code rate and performance i...
Conference Paper
A framework for the analysis of error propagation for high rate runlength-limited codes is developed. The susceptibility to errors of capacity approaching code constructions, the enumerative and sequence replacement technique and bit stu#ng, are analyzed in detail. It is shown that the first two techniques experience low error propagation and that...
Conference Paper
The spectral efficiencies of optical modulation and detection schemes are computed using information-theoretic techniques. The results quantify by how much phase-shift-keying can outperform direct-detection on-off keying when these modulations are used in conjunction with forward error control.
Conference Paper
A special class of linear codes, capable of correcting single errors in a two-dimensional lattice, is introduced. The codes, termed integer codes, are defined over integer rings and are capable of correcting single errors in a lattice with Manhattan distance 1. Three constructions are presented that specify perfect and optimal integer codes for a w...
Conference Paper
A framework for the analysis of error propagation for high rate runlength-limited codes is developed. The susceptibility to errors of capacity approaching code constructions, the enumerative and sequence replacement technique and bit stuffing, are analyzed in detail. It is shown that the first two techniques experience low error propagation and tha...
Article
A new class of codes for frame synchronization is proposed. Commonly, the beginning of every fixed or variable-length frame is identified by a given contiguous sequence called a prefix. To avoid the occurrence of the prefix elsewhere in the frame, a prefix synchronizable code (PS-code) is used. PS-codes have the property that the prefix does not oc...
Patent
Data words are converted to codewords in accordance with a run-length limited (RLL) or maximum transition run (MTR) code in which the codewords are subject to one or more constraints on the number of consecutive like symbols. The data words and the codewords are each partitioned into a number of disjoint subsets. Associated with each of the disjoin...
Article
Full-text available
We present advanced combinatorial techniques for constructing maximum runlength-limited (RLL) block codes and maximum transition run (MTR) codes. These codes find widespread application in recording systems. The proposed techniques are used to construct a high-rate multipurpose modulation code for recording systems. The code, a rate 16/17, (0,3,2,2...
Article
Full-text available
During the past few years, significant progress has been made in defining high capacity constraints which prohibit specified differences between constrained sequences, thus ensuring that the minimum distance between them is larger than for the uncoded system. However, different constraints which avoid the same prescribed set of differences may have...
Article
Frame synchronization is traditionally achieved by inserting a given sequence periodically into the data stream. Here, a new method of synchronization is introduced in which the synchronization sequence is not contiguous, but is interleaved with the data symbols. The properties of these distributed sequences are investigated, and requirements are s...
Conference Paper
The spectral efficiency of mobile radio networks can be improved by allowing each mobile station to act as a relay for one other mobile station. One can expect further performance improvement if each relay aids not just a single mobile station, but many simultaneously. We attempt to quantify this improvement by introducing the multiple-access relay...
Conference Paper
We present new methods to protect maximum run-length constrained sequences against random and burst errors and to avoid error propagation. Specific parallel conversion techniques and enumerative coding algorithms for the transformation of binary user information into constrained codewords are proposed. The new schemes are simple and very efficient....
Article
We consider methods to locate sync words in packet or frame transmission over the additive white Gaussian noise channel. Our starting point is the maximization of the probability of correctly locating the sync word. We extend Massey's original result to the specific synchronization problem, where the sync word is prefixed to the data stream and eac...
Conference Paper
We present a new technique for synchronizing frames of length n, using a sync sequence of the same length n with good cyclic autocorrelation properties. This sequence is modulated and superimposed on the modulated data sequence. The energy of the modulated sync sequence is uniformly distributed and small compared to the energy of the data sequence....