A5041900361- Advanced Wireless Communication Techniques
- Error Correcting Code Techniques
- Radiation Effects in Electronics
- Wireless Communication Networks Research
- Low-power high-performance VLSI design
- VLSI and Analog Circuit Testing
- Advanced MIMO Systems Optimization
- Interconnection Networks and Systems
- Radio Frequency Integrated Circuit Design
- Cellular Automata and Applications
- Electromagnetic Compatibility and Noise Suppression
- Algorithms and Data Compression
- Advancements in Semiconductor Devices and Circuit Design
- Embedded Systems Design Techniques
- Software-Defined Networks and 5G
- Power System Reliability and Maintenance
- Reliability and Maintenance Optimization
- Cooperative Communication and Network Coding
- Integrated Circuits and Semiconductor Failure Analysis
- Smart Grid Security and Resilience
University of Kaiserslautern
2009-2014
Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau
2013-2014
IEEE Computer Society
2013
Highly scaled technologies at and beyond the 22-nm node exhibit increased sensitivity to various scaling-related problems that conspire reduce overall reliability of integrated circuits systems. In prior technology nodes, assumption was manufacturing responsible for ensuring device reliability. This basic is no longer tenable. Trying contain purely level would cause prohibitive increases in power consumption. Thus, a cross-layer approach required, which spreads burden resilience across...
In the context of decoding multiple-input multiple-output (MIMO) symbols, many approaches rise as promising, such successive interference cancellation and sphere decoding. The QR decomposition (QRD) channel impulse response matrix is a critical point to ensure good performance subsequent steps for both approaches. This paper presents low-complexity hardware architecture basic QRD algorithm, which extended two improved versions, namely sorted (SQRD) minimum mean-square error SQRD. main...
Continued progressive downscaling of CMOS technologies threatens the reliability chips for future embedded systems. We developed a novel design methodology dependable wireless communication systems which exploits mutual trade-offs system performance, hardware reliability, and implementation complexity. Our cross-layer approach combines resilience techniques on level with algorithmic exploiting available flexibility in receiver. The overhead is minimized by recovering only from those errors...
Multiple‐antenna systems are a promising approach to increase the data rate of wireless communication systems. One efficient possibility is spatial multiplexing transmitted symbols over several antennas. Many different MIMO detector algorithms exist for this multiplexing. The major difference between detectors resulting communications performance and implementation complexity, respectively. Particularly closed‐loop have attained lot attention in last years. In system, reliability information...
Air bandwidth is a precious resource for wireless communication. Multiple-antenna (MIMO) systems enable an increase in channel capacity without increasing the air bandwidth. An iterative demapping and decoding at receiver improves communications performance remarkably. However, MIMO have high computational complexity. Energy consumption, latency throughput of hardware implementation strongly depend on number iterations. Iteration control techniques are very efficient to reduce average...
Technology scaling leads to a decreasing reliability of the fabricated CMOS circuits. Designing reliable applications on unreliable circuitry is one big challenges next technology generations. Exploiting knowledge multiple abstraction layers from circuit and micro-architecture up algorithm application layer key minimizing dependability cost in terms area, energy performance. Fortunately, many dealing with imprecise information have an inherent error resilience. Therefore, it mandatory...
The rapid shrinking of device geometries in the nanometer regime requires new technology-aware design methodologies. These must be able to evaluate resilience circuit throughout all System on Chip (SoC) abstraction levels. To successfully guide decisions at system level, reliability models, which abstract technology information, are required identify those parts where additional protection form hardware or software coun-termeasures is most effective. Interfaces such as presented Resilience...
The design of double-iterative systems like turbo synchronization or iterative demapping and decoding will be one the big challenges in next years. components such need to fulfill stringent conditions on throughput flexibility thus making a reuse available standard difficult. We present high ASIC for LDPC MIMO with block sizes (3720 14880 bits, granularity 186 bits) code rates (1/2 4/5). After P&R, has an area 4.588 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...
Multiple-antenna systems offer very attractive gains in data rates and transmission reliability. Therefore, they are employed many modern communication standards. However, the detection separation of these multiple streams can be complex. For tree search based methods, a channel preprocessing is mandatory which consists mainly QR matrix decomposition. We propose modification standard decomposition simplifies while not increasing complexity present hardware architectures original modified The...
Abstract. Wireless data transmission results in frequency and phase offsets of the signal receiver. In addition received symbols are corrupted by noise. Therefore synchronization channel coding vital parts each receiver digital communication systems. By combining with an advanced iterative decoder (inner loop) like turbo codes way (outer loop), communications performance can be increased. This principal is referred to as synchronization. For initial estimate offset required. this paper we...
Multiantenna telecommunication systems represent channels with multiple inputs and outputs (MIMO) by matrices. QR decomposition (QRD) of the channel matrix is a crucial part MIMO detection algorithms, such as successive interference cancellation or sphere detection. Modern standards like Long Term Evolution (LTE) require processing millions matrices per second, in order to compensate changes that occur due mobility detector Doppler spread. We introduce new architecture for minimum mean...
FPGA-based rapid-prototyping becomes more and important for the design space exploration of wireless systems. platforms allow faster system with a high degree flexibility. In this paper, we present platform double-iterative MIMO-BICM systems which belong to most complex communication current future (4G, 5G) standards. Unified streaming interfaces simplify connection components replacement individual without influencing rest system. Hardware verification is often very time-consuming task....
Abstract. Wireless data transmission results in frequency and phase offsets of the signal receiver. In addition, received symbols are corrupted by noise. Therefore, synchronization channel coding vital parts each receiver digital communication systems. By combining with an advanced iterative decoder (inner loop) e.g. turbo codes way (outer loop), communications performance can be further increased. This principle is referred to as synchronization. The energy consumption peak throughput...
Reliability of modern MIMO receiver hardware becomes a critical issue due to recent advantages in semiconductor technology and continuous transistor size shrinkage. Most the research conducted so far, analyzed impact solely memory errors on performance receivers' individual components (e.g, decoders) system level whole terms Frame Error Rate (FER). This paper presents first reliability analysis channel preprocessing block receiver. The computational submodules is assessed by gate FPGA-based...
Abstract. Energy efficient processing is mandatory in todays' mobile devices. For the upcoming multiple-antenna systems, algorithmic flexibility enables dynamic reaction to changing channel conditions. We show that most of tree search based MIMO detection algorithms are on same kernels and present a weakly-programmable architecture these observations. In this way, algorithm can be chosen parameterized during runtime according current conditions QoS requirements leading highly energy...