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Optimized signal constellations for trellis-coded modulation on AWGN channels

R.J. Van Der Vleuten, J.H. Weber
1996 IEEE Transactions on Communications  
Abstruct-In earlier publications, performance gains over Ungerboeck type trellis-coded modulation schemes were obtained by optimizing (by hand) the signal constellation.  ...  Using genetic algorithms and simulated annealing, we have found additional cases with performance gains over the Ungerboeck type schemes.  ...  ACKNOWLEDGMENT The authors would like to thank the anonymous reviewers for their helpful comments which improved the presentation of this work.  ... 
doi:10.1109/26.506377 fatcat:uqzamvzu4ndk3ev4i24lcuj2t4

A Trellis-Coded Modulation Scheme with a Novel Expanded 16-Dimensional Constant Envelope Q2PSK Constellation

Milton I. Quinteros, Edit J. Kaminsky, Kenneth V. Cartwright
2009 GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference  
Larger coding gains are easily achieved with encoders of higher rates. In addition, an optimal hardware implementation of the required decoders is described.  ...  This paper presents a TCM scheme that uses a new expanded 16-Dimensional Constant Envelope Q 2 PSK constellation along with a simple convolutional encoder of rate 2/3.  ...  B4 B3 A2 A1 A4 A3 A1 A2 A3 A4 B1 B2 B3 B4 1 1 2 2 3 4 5 6 7 3 4 5 6 7 0 0 Decoder for Saha's CEQ 2 PSK constellation VA 16-D signals Look up table Decoder  ... 
doi:10.1109/glocom.2009.5425761 dblp:conf/globecom/QuinterosKC09 fatcat:wjrapymmovhkfmm66qynw7ud4a

Hybrid Automatic Repeat Requests for MB-OFDM Ultra-Wideband

Darryn Lowe, Xiaojing Huang
2007 2007 Third International Conference on Wireless and Mobile Communications (ICWMC'07)  
It is shown how both Type-I and Type-III HARQ can significantly reduce the packet error rate (PER) in realistic frequency-selective channels.  ...  It is shown how both Type-I and Type-III HARQ can significantly reduce the packet error rate (PER) in realistic frequency-selective channels.  ...  By using the data-rate specific puncturing matrices shown in Fig. 2 , convolutional codes with gains of 3 4 , 5 8 and 1 2 are derived from a single rate 1 3 mother code.  ... 
doi:10.1109/icwmc.2007.47 fatcat:cp5szkquuzhqlpksoqq7cqw2cq

Rotationally invariant space-time trellis codes with 4-D rectangular constellations for high data rate wireless communications

Corneliu Eugen D. Sterian, Cheng-Xiang Wang, Ragnar Johnsen, Matthias Patzold
2004 Journal of Communications and Networks  
The 4-D ST codes constructed here demonstrate about the same frame error rate (FER) performance as their 2-D counterparts, having however the added value of rotational invariance.  ...  We propose both linear and nonlinear ST trellis codes and perform simulations using an appropriate multiple-input multiple-output (MIMO) channel model.  ...  Rule 2: from the block code (0 0, 1 11, 2 2, 3 9, 4 4, 5 15, 6 6, 7 13, 8 8, 9 3, 10 10, 11 1, 12 12, 13 7, 14 14, 15 5) of length 2 defined over the alphabet 16-QAM.  ... 
doi:10.1109/jcn.2004.6596582 fatcat:hsn4ykk3wfbpvly6ugtekbzy7i

Frequency-Domain Fusing Convolutional Neural Network: A Unified Architecture Improving Effect of Domain Adaptation for Fault Diagnosis

Xudong Li, Jianhua Zheng, Mingtao Li, Wenzhen Ma, Yang Hu
2021 Sensors  
In recent years, transfer learning has been widely applied in fault diagnosis for solving the problem of inconsistent distribution of the original training dataset and the online-collecting testing dataset  ...  In this paper, we propose a unified convolutional neural network architecture from a frequency domain perspective for a domain adaptation named Frequency-domain Fusing Convolutional Neural Network (FFCNN  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/s21020450 pmid:33435258 fatcat:rjl7ckhedfc57cr6qi7xnlsmci

Character-correcting convolutional self-orthogonal codes

S.Y. Tong
1971 Information and Control  
It is shown that, given a t-error-correcting BCSOC of rate b-1/b, a character-error correcting convolutional self-orthogonal code (CCSOC) of rate h(b --1)/(h(b --1) -~ 1) can be constructed for any integer  ...  A class of convolutlonal, character-error-correcting codes with limited error propagation is presented. This class of codes is derived from binary convolutional self-orthogonal codes (BCSOC).  ...  Given a B 0 matrix of a binary convolutional self-orthogonal code (BCSOC) of rate (b --1)/b, the B 0 matrix of a character-correcting convolutional selforthogonal code (CCSOC) of rate k(b --1)/(k(b --1  ... 
doi:10.1016/s0019-9958(71)90345-7 fatcat:kuormyux4ncirgfcgbhi2bkeve

A Discrete Time Markov Chain Model for High Throughput Bidirectional Fano Decoders

Ran Xu, Graeme Woodward, Kevin Morris, Taskin Kocak
2010 2010 IEEE Global Telecommunications Conference GLOBECOM 2010  
The relationship between the input data rate, the input buffer size and the clock speed of the BFA decoder is established.  ...  It is shown that there is a tradeoff between the number of BFA decoders and the input buffer size, and an optimal input buffer size can be chosen to minimize the hardware complexity for a target decoding  ...  ACKNOWLEDGMENT The authors would like to thank the Telecommunications Research Laboratory (TRL) of Toshiba Research Europe Ltd. and its directors for supporting this work.  ... 
doi:10.1109/glocom.2010.5683855 dblp:conf/globecom/XuWMK10 fatcat:7otgl27k2zbzrojm7vy3aqiu5m

A Discrete Time Markov Chain Model for High Throughput Bidirectional Fano Decoders [article]

Ran Xu, Graeme Woodward, Kevin Morris, Taskin Kocak
2010 arXiv   pre-print
The relationship between the input data rate, the input buffer size and the clock speed of the BFA decoder is established.  ...  It is shown that there is a tradeoff between the number of BFA decoders and the input buffer size, and an optimal input buffer size can be chosen to minimize the hardware complexity for a target decoding  ...  ACKNOWLEDGMENT The authors would like to thank the Telecommunications Research Laboratory (TRL) of Toshiba Research Europe Ltd. and its directors for supporting this work.  ... 
arXiv:1011.2686v1 fatcat:rbrrpun7vzgclkuxgfrepozlj4

Efficient Search of Compact QC-LDPC and SC-LDPC Convolutional Codes with Large Girth [article]

Mohammad H. Tadayon, Alireza Tasdighi, Massimo Battaglioni, Marco Baldi, Franco Chiaraluce
2018 arXiv   pre-print
The method is extended to time-invariant spatially coupled low-density parity-check convolutional codes, permitting to achieve small syndrome former constraint lengths.  ...  We propose a low-complexity method to find quasi-cyclic low-density parity-check block codes with girth 10 or 12 and shorter length than those designed through classical approaches.  ...  As inputs, it takes m, n, N (m < n ≤ N ), with m, n, N ∈ N, k (= 2, 3, 4, 5) , and an all zero matrix P of dimension m × n.  ... 
arXiv:1804.06454v1 fatcat:ifyxo53cfnfvfmxlgipsguv3yi

UniNet: Unified Architecture Search with Convolution, Transformer, and MLP [article]

Jihao Liu and Xin Huang and Guanglu Song and Yu Liu and Hongsheng Li
2022 arXiv   pre-print
In this work, we study the learnable combination of convolution, transformer, and MLP by proposing a novel unified architecture search approach.  ...  Second, we propose context-aware downsampling modules (DSMs) to mitigate the gap between the different types of operators.  ...  For GOP, we search for convolution, transformer, MLP, and their promising variants, i.e., {SA, LSA, Conv, DWConv, MLP}, as defined in Section 3.2; for e, we search from {2, 3, 4, 5, 6}.  ... 
arXiv:2207.05420v1 fatcat:4qkr5wybsra4ppq6asncyk6xce

Network Coding Using Superregular Matrices For Robust Real-Time Streaming [article]

Jonas Hansen
2017 PhD series, Technical Faculty of IT and Design, ˜Aalborg=ålborgœ University  
Analysis and evaluation of the performance, in terms of symbol loss probability and delay, for both block and convolutional codes. 3.  ...  Second, in order for a systematic lower triangular code to have optimal decoding capabilities, the redundancy part of the encoding matrix must be superregular.  ...  Alias Code type of C1 Code type of C2 CC Systematic convolutional Convolutional TC Systematic triangular block Convolutional TT Systematic triangular block Triangular block DD Dense block Dense  ... 
doi:10.5278/vbn.phd.tech.00035 fatcat:n5ok7m5o3rbnfk5doyvw7aivee

NeoFlow: A Flexible Framework for Enabling Efficient Compilation for High Performance DNN Training

Size Zheng, Renze Chen, Yicheng Jin, Anjiang Wei, Bingyang Wu, Xiuhong Li, Shengen Yan, Yun Liang
2021 IEEE Transactions on Parallel and Distributed Systems  
However, existing DNN training frameworks such as PyTorch and TensorFlow only support a limited range of operators and rely on hand-optimized libraries to provide efficient implementations for these operators  ...  In the experiments, we examine the numerical accuracy and performance of NeoFlow.  ...  For more information, see https://creativecommons.org/licenses/by/4.0/ This article has been accepted for publication in a future issue of this journal, but has not been fully edited.  ... 
doi:10.1109/tpds.2021.3138862 fatcat:e6oyfkd6xrao7cchlusokkchda

Deep-Learning Based Blind Recognition of Channel Code Parameters over Candidate Sets under AWGN and Multi-Path Fading Conditions [article]

Sepehr Dehdashtian, Matin Hashemi, Saber Salehkaleybar
2021 arXiv   pre-print
We propose a deep learning-based solution that I) is capable of identifying the channel code parameters for any coding scheme (such as LDPC, Convolutional, Turbo, and Polar codes), II) is robust against  ...  of detecting the correct code parameters.  ...  For instance, IEEE 802.11n WiFi standard with code-word length n = 648, employs only four different LDPC codes with code rates {1/2, 2/3, 3/4, 5/6} [17] .  ... 
arXiv:2009.07774v2 fatcat:ekccapr6xfajlo2dthn7finure

Cross-Scale Vector Quantization for Scalable Neural Speech Coding [article]

Xue Jiang, Xiulian Peng, Huaying Xue, Yuan Zhang, Yan Lu
2022 arXiv   pre-print
Bitrate scalability is a desirable feature for audio coding in real-time communications.  ...  In this way, a coarse-level signal is reconstructed if only a portion of the bitstream is received, and progressively improves the quality as more bits are available.  ...  To reduce the codebook size when rate increases, several types of vector quantizers could be used like residual and product.  ... 
arXiv:2207.03067v1 fatcat:k3so6bpix5du7kb3kut7s7bhqq

On Punctured Pragmatic Space-Time Codes in Block Fading Channel [article]

Samuele Bandi, Luca Stabellini, Andrea Conti, Velio Tralli
2007 arXiv   pre-print
This paper considers the use of punctured convolutional codes to obtain pragmatic space-time trellis codes over block-fading channel.  ...  We show that good performance can be achieved even when puncturation is adopted and that we can still employ the same Viterbi decoder of the convolutional mother code by using approximated metrics without  ...  PRAGMATIC SPACE-TIME CODES: In this work we consider P 2 -STC in a block fading channel (BFC)(see [4] [5] ) where fading coefficients for each couple of transmitting and receiving antennas are constants  ... 
arXiv:0704.0282v1 fatcat:gtziqwfozzcknac5fbxew72dgy
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