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The most efficient transmission system of the transport network is OTN offered by ITU-T G.709. However, in this recommendation, there is no indication as to what degree of MQAM determining the number of points of signal constellation provides the maximum capacity of multichannel system. This work removes this gap.
Internet of Things (IoT) solutions are increasingly being deployed for smart applications. To provide good communication for the increasing number of smart applications, there is a need for low cost and long range Low Power Wide Area Network (LPWAN) technologies. LoRaWAN is an energy efficient and inexpensive LPWAN solution that is rapidly being adopted all around the world. However, LoRaWAN does...
We study a setting where two source streams with different decoding deadlines must be transmitted over a burst erasure channel. The source streams are multiplexed into a single stream of channel-packets at the encoder and transmitted over a packet erasure channel. The decoder must recover the source-packets within each stream sequentially, by their corresponding deadlines. We consider the burst-erasure...
Modern communication and computation systems consist of large networks of unreliable nodes. Yet, it is well known that such systems can provide aggregate reliability via information redundancy, duplicating paths, or replicating computations. While redundancy may increase the load on a system, it can also lead to major performance improvements through the judicious management of additional system resources...
This paper presents a bandwidth efficient coded modulation scheme based on orthogonal M-ary QAM (OMQAM) modulation. Orthogonal M-ary QAM is a coded multi-quadrature amplitude modulation that utilizes a block of bi-orthogonal code to map a block of data. In this scheme, information data blocks are coded using a block of orthogonal codes which are then modulated by using M-ary QAM. At the receiver the...
Low Density Parity Check (LDPC) and Bose-Chaudhuri-Hochquenghem (BCH) are channel coding that have been recently developed associated with QPSK, 8PSK, 16APSK, and 32APSK modulations for the system to work properly on the nonlinear satellite channel. The likelihood of either system bit error or block error probability is one of the most commonly used features in modern communication systems. This paper...
Orthogonal Frequency Division Multiplexing, together with Multiple-Input Multiple-Output, is a pillar technique for new generation mobile networks, i.e., for the mobile networks in direction of 5G. Its crucial properties of robustness against fading and Inter-symbol Interference make it a great choice for the demanding data rates of future mobile networks. This paper presents a technique for additional...
This paper investigates the performance of the BCH encoder and decoder for different error-correcting capabilities. The focus is on BCH codes of length 255. The motivation for this research is a project where data symbols of this length are transmitted over an error-prone wireless channel. The paper presents a mathematical introduction into encoding for cyclic codes and decoding of the BCH code. The...
Product codes are a concatenated error-correction scheme that has been often considered for applications requiring very low bit-error rates, which demand that the error floor be decreased as much as possible. In this work, we consider product codes constructed from polynomial algebraic codes, and propose a novel low-complexity post-processing technique that is able to improve the error-correction...
The capability of mobile devices to use multiple interfaces to support a single session is becoming more prevalent. Prime examples include the desire to implement WiFi offloading and the introduction of 5G. Furthermore, an increasing fraction of Internet traffic is becoming delay sensitive. These two trends drive the need to investigate methods that enable communication over multiple parallel heterogeneous...
The Galileo E1 Open Service signal broadcasts a navigation message containing 120 bits of information per page on the signal component E1B. This raw navigation message is ½ convolutional encoded with a Forward Error Correcting (FEC) Code. The encoded symbols are interleaved within a block interleaver size of 240 symbols and broadcast every second. The resulting data rate is 250 symbol/second. The...
The Multidimensional Parity Check codes (MDPC) are one of the possible FEC methods of the short information messages. Especially the MDPCs with reduced generator matrix results in codes with block length from few to tens of bits with indispensable code-gain. This paper presents two methods of generation of the MDPC and describe the algorithm for iterative decoding of these codes. The MDPC with short...
We experimentally studied the implementation of forward error correction in software defined radio access networks by means of transceivers based on USRP. We tested the system in a 2 m wireless link and obtain an improvement in the performance of 4 dB for BPSK and QPSK modulation formats and almost of 5 dB for 8-PSK when adding a Reed Solomon code (127, 123) for reducing the errors. A characterization...
Wireless communication technologies became the key integral part of modern systems, experiencing an explosive development during the last two decades and penetrating to enormous number of application areas, based especially on the concept of cellular phones. More recently, short-distance wireless communication has also been discussed as a way to connect embedded electronic systems in industrial applications,...
Wireless communication technologies have experienced an explosive development during the last two decades, based on the concept of cellular phones. More recently, short-distance wireless communication has also been discussed as a way to connect embedded electronic systems in industrial applications. Such systems have to work under stringent real-time constraints. For industrial in-door environments,...
Sparse code multiple access (SCMA) is a novel kind of air interface technology which can dramatically improve spectral efficiency of wireless radio access. Different from conventional CDMA and OFDMA, SCMA achieves the non-orthogonal multiple access of frequency domain. On the other hand, Multiple-Input Multiple-Output (MIMO) can make full use of spatial-domain resource to improve system performance...
Physical layer processing for 5G wireless is expected to operate at a very high-throughput with very low latency. Developing a channel coding system based on Hybrid Automatic Repeat reQuest (HARQ) for evolving requirements necessitates extensive experimentation involving undesirably long development cycles. We demonstrate the use of a High-level Synthesis (HLS) compiler in LabVIEW Communications to...
Multiple description coding has been shown to provide flexible and distortion-rate optimal video streaming transmission over lossy links. In this paper, we provide an adaptive MD-FEC algorithm for point-to-multipoint video streaming that approximately minimizes the average distortion of the multicast video. Our new algorithm accomplishes this by adapting both the packet lengths and their number to...
We improve the encoding/decoding of polarization-switched QPSK (PS-QPSK) to enhance the performance, and show that QPSK-based modified phase-conjugated twin wave is similar to the improved PS-QPSK but provides additional gain via fiber nonlinearity mitigation.
Event-driven communications characterize several key industrial projects for realizing future federated architectures, and publish/subscribe services are considered as key building blocks in such projects. Most of these projects are also affected by strong requirements for the reliability and timely data sharing, since involved in providing decision support for critical activities. In the current...
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