Search Results 1-20 of 3559

  • A Screen Camera Communication Method Using Accumulation of Interframe Differences  [in Japanese]

    山本 純也 , 萬代 雅希

    本研究では,フレーム間差分の累積を利用したスクリーンカメラ通信を提案する.スクリーンカメラ通信とは,ディスプレイの表示フレームに対して情報を埋め込んでおき,ユーザがカメラで撮影することで情報を取得する通信である.既存方式は,市松模様の有無によって情報を埋め込むため,通信距離が遠くなるに従い市松模様を鮮明に撮影することができなくなり,ビット誤り率が急激に上昇する問題がある.提案方式はフレーム間差分の …

    情報処理学会論文誌 60(1), 213-222, 2019-01-15

    IPSJ

  • Enhanced Selected Mapping for Impulsive Noise Blanking in Multi-Carrier Power-line Communication Systems

    KAGEYAMA Tomoya , MUTA Osamu , GACANIN Haris

    … <p>In this paper, we propose an enhanced selected mapping (e-SLM) technique to improve the performance of OFDM-PLC systems under impulsive noise. … We evaluate the probability of false alarms raised by impulsive noise detection and bit error rate (BER) of OFDM-PLC system using the proposed e-SLM. …

    IEICE Transactions on Communications, 2019

    J-STAGE

  • Analysis of maximal-ratio transmit and combining spatial diversity

    Adachi Fumiyuki , Boonkajay Amnart

    … <p>Spatial diversity is still remaining as a powerful means to improve the transmission performance in a multipath fading environment. … Using the derived SNR expression, the average bit error rate (BER) performance of quaternary phase shift keying (QPSK) transmission in a Rayleigh fading environment is numerically evaluated. … It is shown that MRTC provides the BER performance superior to STBC-TD and selective MRTC.</p> …

    IEICE Communications Express 8(5), 153-159, 2019

    J-STAGE

  • Double decision-feedback multiple differential detection for double differential encoding

    Mori Toshiki , Kubo Hiroshi

    … In order to improve performance in the required signal to noise power ratio (SNR) and tracking capability aiming at higher frequency efficiency, the proposed DDFMDD employs decision-feedback multiple differential detection (DFMDD) with channel averaging and DFMDD with channel prediction. … Finally, computer simulation results confirm that the proposed DDFMDD has excellent bit error rate (BER) performance for fast time-varying Rayleigh fading at a larger modulation alphabet size.</p> …

    IEICE Communications Express 8(5), 147-152, 2019

    J-STAGE

  • Improved adaptive STBC-TD in low-to-high mobility environments

    Saito Tomoyuki , Boonkajay Amnart , Adachi Fumiyuki

    … <p>Our recently proposed adaptive space-time block coded transmit diversity (STBC-TD) jointly used with frequency-domain equalization and decision-feedback linear prediction (DFLP) provides a good bit-error rate (BER) performance in a high-mobility environment. … However, in a low-mobility environment, the achievable BER performance degrades. …

    IEICE Communications Express 8(5), 141-146, 2019

    J-STAGE

  • A Novel Low Complexity Lattice Reduction-Aided Iterative Receiver for Overloaded MIMO

    DENNO Satoshi , KAWAGUCHI Yuta , INOUE Tsubasa , HOU Yafei

    … We theoretically analyze the performance of the proposed receiver that the lattice reduction raises the SNR of the detector output signals as the scalar gain increases, when the Lenstra-Lenstra-Lova's (LLL) algorithm is applied to implement the lattice reduction. … Because the SNR improvement causes the scalar gain to increase, the performance is improved by iterating the reception process. … Computer simulations confirm the performance. …

    IEICE Transactions on Communications E102.B(5), 1045-1054, 2019

    J-STAGE

  • Erratum: BER Performance of Human Body Communications Using FSDT [IEICE Transactions on Communications Vol.E102.B (2019) , No.3 pp.522-527]

    PARK Kunho , JEONG Min Joo , BAEK Jong Jin , KIM Se Woong , KIM Youn Tae

    IEICE Transactions on Communications E102.B(4), 956_e1-956_e1, 2019

    J-STAGE

  • Secure Communication Using Scramble Phase Assisting WFRFT

    LIANG Yuan , DA Xinyu , XU Ruiyang , NI Lei , ZHAI Dong , PAN Yu

    … bit error rate (BER) performance while maintaining its own communication quality.</p> …

    IEICE Transactions on Communications E102.B(4), 779-789, 2019

    J-STAGE

  • An Iterative Decoding Scheme for CPM-QC-LDPC Codes Based on Matrix Transform

    XU Zuohong , ZHU Jiang , CHENG Qian , ZHANG Zixuan

    … We first propose a two-stage decoding scheme mainly based on parity check matrix transform (MT), which can efficiently improve the bit error rate performance. … To optimize the tradeoff between hardware implementation complexity and decoding performance, an improved method that combines our proposed MT scheme with the existing CPM-RID decoding scheme is presented. … An experiment shows that both schemes can improve the bit error rate (BER) performance. …

    IEICE Transactions on Communications E102.B(3), 496-509, 2019

    J-STAGE

  • An Equalization of PN-DSTBC for Concatenating with Spectral Precoding

    YAMAGUCHI Kanako , GRESSET Nicolas , NISHIMOTO Hiroshi , OKAZAKI Akihiro , SANO Hiroyasu , UMEDA Shusaku , TSUKAMOTO Kaoru , OKAMURA Atsushi

    … However, there is a problem that a naive concatenation degrades the performance due to the imbalance of equivalent noise variances over transmit frequencies. … The performance evaluation using computer simulations shows that the proposed modified approach yields the performance improvement at any modulation schemes and at any number of transmit frequencies. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E102.A(3), 544-552, 2019

    J-STAGE

  • BER Performance of Human Body Communications Using FSDT

    PARK Kunho , JEONG Min Joo , BAEK Jong Jin , KIM Se Woong , KIM Youn Tae

    … <p>This paper presents the bit error rate (BER) performance of human body communication (HBC) receivers in interference-rich environments. … The BER performance was measured while applying an interference signal to the HBC receiver to consider the effect of receiver performance on BER performance. …

    IEICE Transactions on Communications E102.B(3), 522-527, 2019

    J-STAGE

  • Envelope detection of 16QAM single carrier signal for IM/DD RoF system at Q-band

    Lv Kai , Pan Xiaolong , Zhang Junwen , Wang Kaihui , Guo Dong , Zhang Qi , Li Deng'ao , Xin Xiangjun

    … We theoretically and experimentally study the performance of the signal under various conditions. … In the system, 2 GBaud 16QAM signal is delivered over 25 km standard single mode fiber (SSMF) link and 2.9 m wireless link under bit error rate (BER) of 3.8 × 10<sup>−3</sup>.</p> …

    IEICE Electronics Express 16(4), 20180986-20180986, 2019

    J-STAGE

  • Analysis of maximal-ratio transmit and combining spatial diversity

    Adachi Fumiyuki , Boonkajay Amnart

    … <p>Spatial diversity is still remaining as a powerful means to improve the transmission performance in a multipath fading environment. … Using the derived signal-to-noise power ratio (SNR) expression, the average bit error rate (BER) performance of quaternary phase shift keying (QPSK) transmission in a Rayleigh fading environment is numerically evaluated. …

    IEICE Communications Express, 2019

    J-STAGE

  • Double decision-feedback multiple differential detection for double differential encoding

    Mori Toshiki , Kubo Hiroshi

    … In order to improve performance in the required signal to noise power ratio (SNR) and tracking capability aiming at higher frequency efficiency, the proposed DDFMDD employs decision-feedback multiple differential detection (DFMDD) with channel averaging and DFMDD with channel prediction. … Finally, computer simulation results confirm that the proposed DDFMDD has excellent bit error rate (BER) performance for fast time-varying Rayleigh fading at a larger modulation alphabet size.</p> …

    IEICE Communications Express, 2019

    J-STAGE

  • Power allocation scheme for energy efficiency maximization in distributed antenna system with discrete-rate adaptive modulation

    YU Xiangbin , WANG Xi , TENG Tao , LI Qiyishu , WANG Fei

    … By means of the Karush-Kuhn- Tucker (KKT) conditions, an optimal PA scheme with closedform expression is derived for maximizing the EE subject to maximum transmit power and target bit error rate (BER) constraints, where the number of active transmit antennas is also derived for attaining PA coefficients. … By choosing one or two remote antennas, the suboptimal scheme offers lower complexity than the optimal one, and has almost the same EE performance as the latter. …

    IEICE Transactions on Communications, 2019

    J-STAGE

  • Improved adaptive STBC-TD in low-to-high mobility environments

    Saito Tomoyuki , Boonkajay Amnart , Adachi Fumiyuki

    … <p>Our recently proposed adaptive space-time block coded transmit diversity (STBC-TD) jointly used with frequency-domain equalization and decision-feedback linear prediction (DFLP) provides a good bit-error rate (BER) performance in a high-mobility environment. … However, in a low-mobility environment, the achievable BER performance degrades. …

    IEICE Communications Express, 2019

    J-STAGE

  • BER Analysis of WFRFT-Based Systems with Order Offset

    LIANG Yuan , DA Xinyu , XU Ruiyang , NI Lei , ZHAI Dong , PAN Yu

    … <p>We propose a novel bit error rate (BER) analysis model of weighted-type fractional Fourier transform (WFRFT)-based systems with WFRFT order offset Δα. … By using the traditional BPSK BER analysis method, we deduce the equivalent signal noise ratio (SNR), model the interference in the channel as a Gaussian noise with non-zero mean, and provide a theoretical BER expression of the proposed system. …

    IEICE Transactions on Communications E102.B(2), 277-284, 2019

    J-STAGE

  • Performance Analysis of Block MSN Algorithm with Pseudo-Noise Control in Multi-User MIMO System

    KIKUMA Nobuyoshi , YONEZU Kousuke , SAKAKIBARA Kunio

    … In this paper, to enhance further the BMSN performance, we propose the BMSN algorithm that has the pseudo-noise determined according to receiver SNR. … As a result of computer simulation, it is confirmed that the proposed BMSN algorithm shows the significantly improved performance in evaluation of bit error rate (BER) and achievable bit rate (ABR).</p> …

    IEICE Transactions on Communications E102.B(2), 224-232, 2019

    J-STAGE

  • Envelope Detection of 16QAM Single Carrier Signal for IM/DD RoF System at Q-band

    Lv Kai , Pan Xiaolong , Zhang Junwen , Wang Kaihui , Guo Dong , Zhang Qi , Li Deng'ao , Xin Xiangjun

    … We theoretically and experimentally study the performance of the signal under various conditions. … In the system, 2GBaud 16QAM signal is delivered over 25km standard single mode fiber (SSMF) link and 2.9m wireless link under bit error rate (BER) of 3.8×10<sup>-3</sup>.</p> …

    IEICE Electronics Express, 2019

    J-STAGE

  • Enhancing a BPSK receiver by employing a practical parallel network with Stochastic resonance

    Tadokoro Yukihiro , Tanaka Hiroya , Nakashima Yasuo , Yamazato Takaya , Arai Shintaro

    … This results in the lower performance of SR receivers in comparison with linear receivers. … The present theoretical analysis demonstrates that in a certain noise intensity range, the output of the network can fully describe an input sub-threshold signal, and hence, the performance close to that of the linear receivers can be obtained. … The effectiveness of the SR receiver was also demonstrated through a numerical example of the bit error rate (BER). …

    Nonlinear Theory and Its Applications, IEICE 10(1), 106-114, 2019

    J-STAGE

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