Search Results 1-20 of 72

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  • Robustness of a Combined Modified Dixon and PROPELLER Sequence with Two Interleaved Echoes in Clinical Head and Neck MRI

    Shigenaga Yutaka , Takenaka Daisuke , Hashimoto Tomohisa , Ishida Takayuki

    … <p>Purpose: The combination of modified Dixon (mDixon) and periodically rotated overlapping parallel lines with enhanced reconstruction sequence with two interleaved echoes, which promotes uniform fat-suppression and motion insensitivity, has recently become available for commercial magnetic resonance imaging (MRI) scanners. …

    Magnetic Resonance in Medical Sciences 20(1), 76-82, 2021

    J-STAGE 

  • Evaluation of image quality of pituitary dynamic contrast-enhanced MRI using time-resolved angiography with interleaved stochastic trajectories (TWIST) and iterative reconstruction TWIST (IT-TWIST)

    Yokota Yusuke , Fushimi Yasutaka , Okada Tomohisa , Fujimoto Koji , Oshima Sonoko , Nakajima Satoshi , Fujii Toshihito , Tanji Masahiro , Inagaki Nobuya , Miyamoto Susumu , Togashi Kaori

    … Background: Time‐resolved angiography with interleaved stochastic trajectories (TWIST) is a keyhole imaging with frequent sampling of central k‐space data and view‐sharing for the peripheral k‐space of dynamic phases. … Field Strength/Sequence: 3T/TWIST and IT‐TWIST. …

    Journal of magnetic resonance imaging : JMRI 51(5), 1497-1506, 2020-05

    IR 

  • Constellation Shaping for Bit-Interleaved Coded Modulation with Pseudorandom Sequence  [in Japanese]

    由利 昌司 , 柴田 凌 , 細谷 剛 , 八嶋 弘幸

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 118(139), 45-50, 2018-07-19

  • Probabilistic Shaping for BICM with Pseudorandom Sequence

    Masashi Yuri , Ryo Shibata , Gou Hosoya , Hiroyuki Yashima

    IEICE Proceeding Series (55), 493-493, 2018

    DOI 

  • Linear Complexity of Geometric Sequences Defined by Cyclotomic Classes and Balanced Binary Sequences Constructed by the Geometric Sequences

    TSUCHIYA Kazuyoshi , OGAWA Chiaki , NOGAMI Yasuyuki , UEHARA Satoshi

    … An m-sequence is a linear feedback shift register sequence with maximal period over a finite field. … A geometric sequence is a sequence given by applying a nonlinear feedforward function to an m-sequence. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E101.A(12), 2382-2391, 2018

    J-STAGE 

  • Design of Asymmetric ZPC Sequences with Multiple Subsets via Interleaving Known ZPC Sequences

    ZENG Xiaoli , WANG Longye , WEN Hong , ZHANG Gaoyuan

    … <p>By interleaving known Z-periodic complementary (ZPC) sequence set, a new ZPC sequence set is constructed with multiple ZPC sequence subsets based on an orthogonal matrix in this work. … For this novel ZPC sequence set, which refer to as asymmetric ZPC (AZPC) sequence set, its inter-subset zero cross-correlation zone (ZCCZ) is larger than intra-subset zero correlation zone (ZCZ). …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E101.A(6), 982-987, 2018

    J-STAGE 

  • Performance Analysis of OSTBC Transmission in Lossy Forward MIMO Relay Networks

    He Jiguang , Tervo Valtteri , Qian Shen , Juntti Markku , Matsumoto Tad

    … The relay forwards the decoded and interleaved information sequence even though the information part may contain error(s), according to the lossy forward strategy. …

    IEEE Communications Letters 21(8), 1791-1794, 2017-04-24

    IR 

  • Temporal averaging of two-dimensional correlation functions for velocity vector imaging of cardiac blood flow  [in Japanese]

    TAKAHASHI Hiroki , HASEGAWA Hideyuki , KANAI Hiroshi

    <B>目的</B>:心内腔血流の超音波イメージングはヒトの心臓のポンプ機能を評価するのに非常に有用なツールである.スペックルトラッキング法は血流速度ベクトルの推定を可能にする.しかし,微小な血球からのエコーの信号対雑音比が低いため,血流速度ベクトルを安定的に推定することは難しい.本研究では,血流速度ベクトルの推定精度向上のために,2次元相関関数の時間平均化を行うスペックルト …

    Choonpa Igaku 44(3), 275-285, 2017

    J-STAGE  Ichushi Web 

  • Interleaved Sequences of Geometric Sequences Binarized with Legendre Symbol of Two Types

    TSUCHIYA Kazuyoshi , NOGAMI Yasuyuki , UEHARA Satoshi

    … An m-sequence is a linear feedback shift register sequence with maximal period over a finite field. … A geometric sequence is a binary sequence given by applying a nonlinear feedforward function to an m-sequence. … Nogami, Tada and Uehara proposed a geometric sequence whose nonlinear feedforward function is given by the Legendre symbol. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E100.A(12), 2720-2727, 2017

    J-STAGE 

  • The Crosscorrelation of Binary Interleaved Sequences of Period 4<i>N</i>

    YAN Tongjiang , YUAN Ruixia , MA Xiao

    … <p>In this paper, we consider the crosscorrelation of two interleaved sequences of period 4<i>N</i> … Results show that the interleaved sequences achieve the largest crosscorrelation value 4√<i>N</i>.</p> …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E100.A(11), 2513-2517, 2017

    J-STAGE 

  • Designs of Zero Correlation Zone Sequence Pair Set with Inter-Subset Uncorrelated Property

    ZENG Xiaoli , WANG Longye , WEN Hong

    … <p>An inter-subset uncorrelated zero-correlation zone (ZCZ) sequence pair set is one consisting of multiple ZCZ sequence pair subsets. … What's more, two arbitrary sequence pairs which belong to different subsets should be uncorrelated sequence pairs in this set, i.e., the cross-correlation function (CCF) between arbitrary sequence pairs in different subsets are zeros at everywhere. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E100.A(9), 1936-1941, 2017

    J-STAGE 

  • Asymmetric ZCZ Sequence Sets with Inter-Subset Uncorrelated Sequences via Interleaved Technique

    WANG Longye , ZENG Xiaoli , WEN Hong

    … <p>An uncorrelated asymmetric ZCZ (UA-ZCZ) sequence set is a special version of an asymmetric ZCZ (A-ZCZ) sequence set, which contains multiple subsets and each subset is a typical ZCZ sequence set. … One of the most important properties of UA-ZCZ sequnence set is that two arbitrary sequences from different sequence subsets are uncorrelated sequences, whose cross-correlation function (CCF) is zeros at all shifts. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E100.A(2), 751-756, 2017

    J-STAGE 

  • Designs of Inter-Group Complementary Sequence Set from Interleaving Z-Periodic Complementary Sequences

    WANG Longye , ZENG Xiaoli , WEN Hong

    … Novel constructions of inter-group complementary (IGC) sequences are proposed based on Z-periodic complementary (ZPC) sequences and uncorrelated sequence set by taking advantages of interleaved operation. … The presented methods can get IGC sequences from interleaving ZPC sequence set. … The proposed methods not only can get polyphase IGC sequence set, but also can obtain binary and ternary IGC sequence set. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E99.A(5), 987-993, 2016

    J-STAGE 

  • Diagnosis of Stochastic Discrete Event Systems Based on <i>N</i>-Gram Models with Wildcard Characters

    HIRAISHI Kunihiko , KOBAYASHI Koichi

    … In previous papers by the authors, a new scheme for diagnosis of stochastic discrete event systems, called <i>sequence profiling</i> … However, when the target system is a distributed system consisting of several subsystems, event sequences from subsystems may be interleaved, and SP cannot separate the faulty event sequence from the interleaved sequence. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E99.A(2), 462-467, 2016

    J-STAGE 

  • Unique Decoding of Certain Reed-Solomon Codes

    SHEN Lin-Zhi , FU Fang-Wei , GUANG Xuan

    … By the "virtual extension", we can embed these codes into homogeneous interleaved Reed-Solomon codes. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E98.A(12), 2728-2732, 2015

    J-STAGE 

  • Construction of Z-Periodic Complementary Sequence Based on Interleaved Technique

    WU Yan , CAO Yuanlong

    … This paper proposes a construction method of binary Z-periodic complementary sequence set (Z-PCSs) based on binary aperiodic complementary sequence pair (Golay pair) and interleaved technique. … The designed sequence has periodic complementary characteristics, which lead to a strong ability to resist multi-path interference and multiple access interference. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E98.A(10), 2165-2170, 2015

    J-STAGE 

  • Comments on "New Constructions of Perfect 8-QAM+/8-QAM Sequences"

    ZENG Fanxin

    … Since the autocorrelation of a perfect sequence under unit constant transform is invariable, Xu, et al.'s constructions are the special case of Zeng, et al.'s constructions. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E98.A(6), 1334-1338, 2015

    J-STAGE 

  • On the Average Hamming Correlation of Frequency Hopping Sequences

    HAN Hongyu , PENG Daiyuan , LIU Xing

    … Based on interleaved technique, a new construction for optimal AHC FHS sets is also proposed, which generalizes the construction of Chung and Yang. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E97.A(6), 1430-1433, 2014

    J-STAGE 

  • A Novel Construction of Asymmetric ZCZ Sequence Sets from Interleaving Perfect Sequence

    WANG Longye , ZENG Xiaoli , WEN Hong

    … An asymmetric zero correlation zone (A-ZCZ) sequence set is a type of ZCZ sequence set and consists of multiple sequence subsets. … It is the most important property that is the cross-correlation function between arbitrary sequences belonging to different sequence subsets has quite a large zero-cross-correlation zone (ZCCZ). …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E97.A(12), 2556-2561, 2014

    J-STAGE 

  • Volume Isotropic Simultaneous Interleaved Black- and Bright-blood Imaging: A Novel Sequence for Contrast-enhanced Screening of Brain Metastasis

    YONEYAMA Masami , YOSHIURA Takashi , OBARA Makoto , TAKAHARA Taro , KIKUCHI Kazufumi , NAKAMURA Masanobu , TATSUNO Satoshi , SAWANO Seishi , OGINO Tetsuo , TOGAO Osamu

    … We introduced and optimized a novel sequence of fast (about 4 min), volumetric, high resolution, simultaneous bright- and black-blood imaging with sufficient T<sub>1</sub> … This proposed sequence can be used for 3-dimensional volumetric T<sub>1</sub>-weighted bright- and black-blood imaging in contrast-enhanced studies and may be promising for detecting small brain metastases by improving differentiation between blood vessels and small brain metastases. …

    Magnetic Resonance in Medical Sciences 13(4), 277-284, 2014

    J-STAGE 

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