Search Results:　 1-20 of 73

  • 1

    Modified Two-Dimensional Soft Output Viterbi Algorithm with Two-Dimensional Partial Response Target for Holographic Data Storage

    Koo Keunhwi , Kim Soo-Yong , Kim Sang Woo

    … The previously modified two-dimensional (2D) soft output Viterbi algorithm (SOVA) for holographic data storage (HDS) consists of four one-dimensional (1D) SOVAs in accordance with two different 1D partial response (PR) targets (vertical and horizontal directions). … In this study, we propose a detection method in structural accordance with a 2D PR target through the use of the modified 2D SOVA. …

    Jpn J Appl Phys 51(8), 08JB03-08JB03-5, 2012-08-25

    The Japan Society of Applied Physics

  • 2

    Structured LDPC Codes to Reduce Pseudo Cycles for Turbo Equalization in Perpendicular Magnetic Recording

    SUPNITHI Pornchai , PHAKPHISUT Watid , SINGHAUDOM Wicharn

    … However, the turbo equalization, which relies on an interaction between an inner code such as an LDPC code and a soft-output Viterbi algorithm (SOVA) detector, exhibits a performance degradation due to the pseudo cycles. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences 94(6), 1441-1448, 2011-06-01

    J-STAGE CrossRef References (13)

  • 3

    Iterative Timing Recovery with the Split-Preamble Strategy for Coded Partial Response Channels

    WARISARN Chanon , KOVINTAVEWAT Piya , SUPNITHI Pornchai

    … This paper proposes a modified per-survivor iterative timing recovery scheme, which exploits a new split-preamble strategy in conjunction with a per-survivor processing soft-output Viterbi algorithm (PSP-SOVA). … This split preamble is utilized to adjust the branch metric calculation in PSP-SOVA to ensure that the survivor path occurs in a correct direction. …

    IEICE Transactions on Electronics 94(3), 368-374, 2011-03-01

    J-STAGE CrossRef References (22)

  • 4

    A Modification of Battail-SOVA  [in Japanese]

    HAGIMA Futoshi , NIINOMI Toshihiro , KUWAKO Masashi , YOKOYAMA Takanori

    … 畳込み符号の復号シンボルに対する事後確率比を近似的に求めるアルゴリズムとして,BattailによるSOVA(Soft Output Viterbi Algorithm)が知られている.このアルゴリズムはMax-Log-MAPとは異なり,トレリスの始点から終点への一方向のみの計算を行う.しかし,その近似方法がMax-Log-MAPと等価であることがFossorierによって示されている.本論文では,一方向のみの計算過程において捨てられた複数本のパスのゆう度を記憶し,事後確率比の計算 …

    The Transactions of the Institute of Electronics, Information and Communication Engineers. A J93-A(10), 667-676, 2010-10-01

    CiNii Fulltext PDF - Subscription  References (8)

  • 5

    Modified Two-Dimensional Soft Output Viterbi Algorithm for Holographic Data Storage

    Kim Jinyoung , Lee Jaejin

    … We propose an alternate two-dimensional soft output Viterbi algorithm (2D SOVA) for holographic data storage. … The proposed 2D SOVA uses a one-dimensional (1D) SOVA for both the horizontal and vertical directions. … The 1D SOVA detects each direction with extrinsic information on the other direction's 1D SOVA. …

    Jpn J Appl Phys 49(8), 08KB03-08KB03-3, 2010-08-25

    The Japan Society of Applied Physics

  • 6

    Implant Complications, Fusion, Loss of Lordosis, and Outcome After Anterior Cervical Plating With Dynamic or Rigid Plates : Two-Year Results of a Multi-Centric, Randomized, Controlled Study

    PITZEN Tobias R. , CHROBOK Jiri , STULIK Jan , RUFFING Sabine , DRUMM Joerg , SOVA Laurentius , KUCERA Roman , VYSKOCIL Tomas , STEUDEL Wolf Ingo

    Spine 34(7), 641-646, 2009-04-01

    References (23) Cited by (1)

  • 7

    Partial Response Maximum Likelihood Detections Using Two-Dimensional Soft Output Viterbi Algorithm with Two-Dimensional Equalizer for Holographic Data Storage

    Kim Jinyoung , Lee Jaejin

    … We present partial response maximum likelihood (PRML) detection with two-dimensional (2D) equalizer scheme and introduce 2D soft output Viterbi algorithm (SOVA) detection for holographic data storage (HDS) channel. …

    Jpn J Appl Phys 48(3), 03A033-03A033-3, 2009-03-25

    The Japan Society of Applied Physics

  • 8

    Two-Dimensional 5:8 Modulation Code for Holographic Data Storage

    Kim Jinyoung , Lee Jaejin

    … Bit error rates (BERs) are measured by the threshold detection and the 2D soft-output Viterbi algorithm (SOVA) collaborated with 2D equalizer at the blur of 1.85. … As a result, when the 2D SOVA is applied and the data is quantized to 1 or 2 bits, the SNR of the proposed 5:8 code is approximately 3 dB better than that of the 6:8 code at $10^{-5}$ BER. …

    Jpn J Appl Phys 48(3), 03A031-03A031-4, 2009-03-25

    The Japan Society of Applied Physics

  • 9

    A Study on SOVA decoder for iterative decoding in perpendicular magnetic recording  [in Japanese]

    NAKAMURA Yasuaki , HARUGAICHI Shintaro , OKAMOTO Yoshihiro , OSAWA Hisashi , MURAOKA Hiroaki

    … 全体を撹絆するLDPC(low density parity check)符号と構造化RIA-LDPC(random interleaved array LDPC)符号をSOVA(soft output Viterbi algorithm)復号器またはAPP復号器と組み合わせた方式におけるメモリ量とビット誤り率による性能比較を垂直磁気記録再生系モデルを用いた計算機シミュレーションにより行っている.その結果,RIA-LDPC符号とSOVA復号器を用いたLDPC符号化・繰り返し復号化方式は,符号全体の撹絆によるLDPC符号とAPP復 …

    ITE Technical Report 32(55), 19-24, 2008-12-11

    CiNii Fulltext PDF - Subscription  References (12)

  • 10

    A Study on SOVA decoder for iterative decoding in perpendicular magnetic recording  [in Japanese]

    NAKAMURA Yasuaki , HARUGAICHI Shintaro , OKAMOTO Yoshihiro , OSAWA Hisashi , MURAOKA Hiroaki

    … 全体を撹拌するLDPC(low density parity check)符号と構造化RIA-LDPC(random interleaved array LDPC)符号をSOVA(soft output Viterbi algorithm)復号器またはAPP復号器と組み合わせた方式におけるメモリ量とビット誤り率による性能比較を垂直磁気記録再生系モデルを用いた計算機シミュレーションにより行っている.その結果,RIA-LDPC符号とSOVA復号器を用いたLDPC符号化・繰り返し復号化方式は,符号全体の撹拌によるLDPC符号とAPP復 …

    IEICE technical report. Magnetic recording 108(346), 19-24, 2008-12-04

    CiNii Fulltext PDF - Subscription  References (12)

  • 11

    Sub-Block Recovery Scheme for Iterative Decoding of Turbo Codes with the Sub-Block Structure

    BAI Chunlong , MIELCZAREK Bartosz , FAIR Ivan J. , KRZYMIEN Witold A.

    … We analyze the decoding performance when sub-block recovery is used together with the maximum likelihood (ML) algorithm as well as the log maximum-a-posteriori probability (Log-MAP) and the soft output Viterbi algorithm (SOVA) and demonstrate gains introduced by the sub-block recovery in the latter two cases using computer simulations. …

    IEICE Transactions on Communications 91(5), 1375-1386, 2008-05-01

    J-STAGE CrossRef References (13) Cited by (1)

  • 12

    Normalization of Output Information for a Turbo Decoder Using SOVA(Communication Theory and Signals)

    LIN Yi-Nan , HUNG Wei-Wen

    … It has been shown that the output information produced by the soft output Viterbi algorithm (SOVA) is too optimistic. …

    IEICE transactions on fundamentals of electronics, communications and computer sciences E90-A(10), 2336-2339, 2007-10-01

    CiNii Fulltext PDF - Subscription  References (7)

  • 13

    Study on Performance Improvement of Turbo Equalization Concatenated by SC/MMSE  [in Japanese]

    KADOIKE Yuta , OKAMOTO Eiji , IWANAMI Yasunori

    … 号特性が得られる符号化器を用いて等化を行う場合,マルチパス環境下におけるISI SOVA等化器やSC/MMSE等化器との組み合わせによるターボ等化方式では,他の符号化器を用いたターボ等化に比べてAWGN通信路でのBER特性への収束特性が劣る.そのため,更なる特性改善が必要だと考えられる.そこで本稿では,ターボ符号とISI SOVA等化器によるターボ等化方式に,SC/MMSE等化器を連接する方式を提案した.また,計算 …

    Technical report of IEICE. RCS 107(147), 7-12, 2007-07-12

    CiNii Fulltext PDF - Subscription  References (9)

  • 14

    Performance Evaluation of Turbo Trellis-Coded Modulation Schemes Using Multidimensional QAM Signal Sets  [in Japanese]

    GOTOH Wataru , TSUJIOKA Tetsuo

    近年,帯域利用効率の高いトレリス符号化変調と,シャノン限界に迫るビット誤り率特性を示すターボ符号を組み合わせたターボトレリス符号化変調の研究が活発に行中れている.また,多次元トレリス符号化変調とターボ符号を組み合わせた多次元ターボトレリス符号化変調の研究も行われている.ターボトレリス符号化変調が2元生成ベクトルに基づく多次元PSK信号に適用され,信号設計における高い柔軟性,高い帯域利用効率,大きい …

    IEICE technical report. Communication systems 105(638), 85-90, 2006-02-28

    CiNii Fulltext PDF - Subscription  References (7)

  • 15

    Performance Evaluation of Turbo Trellis-Coded Modulation Schemes Using Multidimensional QAM Signal Sets  [in Japanese]

    GOTOH Wataru , TSUJIOKA Tetsuo

    近年,帯域利用効率の高いトレリス符号化変調と,シャノン限界に迫るビット誤り率特性を示すターボ符号を組み合わせたターボトレリス符号化変調の研究が活発に行われている.また,多次元トレリス符号化変調とターボ符号を組み合わせた多次元ターボトレリス符号化変調の研究も行われている.ターボトレリス符号化変調が2元生成ベクトルに基づく多次元PSK信毎に適用され,信号設計における高い柔軟性,高い帯域利用効率,大きい …

    IEICE technical report. Circuits and systems 105(634), 85-90, 2006-02-28

    CiNii Fulltext PDF - Subscription  References (7)

  • 16

    Performance Evaluation of Turbo Trellis-Coded Modulation Schemes Using Multidimensional QAM Signal Sets  [in Japanese]

    GOTOH Wataru , TSUJIOKA Tetsuo

    近年,帯域利用効率の高いトレリス符号化変調と,シャノン限界に迫るビット誤り率特性を示すターボ符号を組み合わせたターボトレリス符号化変調の研究が活発に行われている.また,多次元トレリス符号化変調とターボ符号を組み合わせた多次元ターボトレリス符号化変調の研究も行われている.ターボトレリス符号化変調が2元生成ベクトルに基づく多次元PSK信号に適用され,信号設計における高い柔軟性,高い帯域利用効率,大きい …

    IEICE technical report. Signal processing 105(636), 85-90, 2006-02-28

    CiNii Fulltext PDF - Subscription  References (7)

  • 17

    An application of block codes to turbo equalization  [in Japanese]

    Matsuoka Katsuhiro , Okamoto Eiji , Iwanami Yasunori

    携帯電話を初めとする移動体通信においては,マルチパスフェージングが深刻な問題である一方で,高速,大容量の通信が求められている.そこで本論文ではこれらの問題を解決するために,優れた等化能力を有するターボ等化器と,比較的伝送レートを高く設定することが可能であるBCM(Block Coded Modulation)を合わせたBCMターボ等化を提案し,その構成,伝送特性について検討を行った.また,LDPC …

    Technical report of IEICE. RCS 105(623), 13-18, 2006-02-22

    CiNii Fulltext PDF - Subscription  References (8)

  • 18

    位相が高速に変動する通信路におけるターボ等化について  [in Japanese]

    MOCHIDA Shinichi , HASHIMOTO Takeshi

    情報理論とその応用シンポジウム予稿集 = The proceedings of the Symposium on Information Theory and Its Applications 27(2), 807-810, 2005-12-14

    References (7)

  • 19

    Performance Evaluation of Turbo Trellis-Coded Modulation Schemes Using Multidimensional 4-, 8- and 16-PSK Signal Sets

    Yamamoto Katsutoshi , Tsujioka Tetsuo , Sugiyama Hisayoshi , Murata Masashi

    In this paper, we evaluate turbo trellis-coded modulation schemes using multidimensional (multi-D) 4-, 8- and 16- PSK signal sets based on binary generators. Trellis-coded multi-D phase modulation has …

    IEICE technical report. Information theory 105(83), 31-36, 2005-05-18

    CiNii Fulltext PDF - Subscription  References (7)

  • 20

    RAKE-SOVA Equalization for Multi-Code CDMA System with Low Spreading Factor(Wireless Communication Technologies)

    ZHAO Junhui , WANG Dongming , YOU Xiaohu , KIM Yun Hee

    … In order to suppress ISI and MCI, a novel receiver based on soft-output viterbi algorithm (SOVA) equalization is proposed in this paper. … The SOVA equalization is applied to symbol sequences after RAKE combining and MCI cancellation to effectively eliminate the ISI during transmission of high rate data in wideband DS-CDMA systems. … Simulation results show that the proposed RAKE-SOVA receiver significantly outperform the traditional RAKE and RAKE-VA receivers. …

    IEICE transactions on communications E88-B(5), 2087-2092, 2005-05-01

    CiNii Fulltext PDF - Subscription