ITE Technical Report
Online ISSN : 2424-1970
Print ISSN : 1342-6893
ISSN-L : 1342-6893
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39.38
Displaying 1-11 of 11 articles from this issue
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  • [title in Japanese]
    Article type: Cover
    Pages Cover1-
    Published: October 16, 2015
    Released on J-STAGE: September 22, 2017
    DOIhttps://doi.org/10.11485/itetr.39.38.0_Cover1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • [title in Japanese]
    Article type: Index
    Pages Toc1-
    Published: October 16, 2015
    Released on J-STAGE: September 22, 2017
    DOIhttps://doi.org/10.11485/itetr.39.38.0_Toc1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • A Study on the Forward Error Correction Pointer for the Next Generation Terrestrial Broadcasting
    Hiroaki MIYASAKA, Akihiko SATO, Shingo ASAKURA, Takuya SHITOMI, Susumu ...
    Article type: Article
    Session ID: BCT2015-69
    Published: October 16, 2015
    Released on J-STAGE: September 22, 2017
    DOIhttps://doi.org/10.11485/itetr.39.38.0_1
    CONFERENCE PROCEEDINGS FREE ACCESS
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    NHK is conducting research on the next generation of digital terrestrial broadcasting to enable large-volume content such as 8K Super Hi-Vision. LDPC codes have been studied as forward error collection (FEC). The error correction capability of LDPC code can be improved by increasing the code length. However, it would be difficult to set the number of data bits in an OFDM frame to an integer multiple of the long code length. Then, even if OFDM frame synchronization is acquired in the receiver, the beginning of LDPC code cannot be detected. So we propose FEC pointer to inform the decoding position to the receiver. This paper describes the computer simulation results of the FEC pointer transmission.
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  • Study of Error Correction Method to Improve Burst Loss Tolerance of Video Signal Transmission Using IP Packet
    Junichiro KAWAMOTO, Tsuyoshi NAKATOGAWA, Takuya KURAKAKE
    Article type: Article
    Session ID: BCT2015-70
    Published: October 16, 2015
    Released on J-STAGE: September 22, 2017
    DOIhttps://doi.org/10.11485/itetr.39.38.0_5
    CONFERENCE PROCEEDINGS FREE ACCESS
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    With the spread of communication networks using IP (Internet Protocol), technical development and standardization of transmitting uncompressed or compressed video signals in IP packets is performed. In an IP transmission, network switch equipment, which has been placed in the transmission path, may be successively discards the input packet (burst loss). When a transmission packet loss is occurred, block noise appears on the video signal to be recovered at the receiver side, so that stable video transmission becomes difficult. Therefore, FEC (Forward Error Correction) method to restore the lost packets is effective. In this paper, we, propose the new FEC method to improve the burst loss resistance compared to the conventional method, which restore the lost packet using the exclusive OR operation. We also report about our simulation results of the new FEC performance.
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  • On Received Frame Sharing Protocol for Collaborative Interference Cancellation
    Daisuke UMEHARA
    Article type: Article
    Session ID: BCT2015-71
    Published: October 16, 2015
    Released on J-STAGE: September 22, 2017
    DOIhttps://doi.org/10.11485/itetr.39.38.0_9
    CONFERENCE PROCEEDINGS FREE ACCESS
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    Let us assume that space division multiplexing (SDM) signal without precoding is transmitted at a base station (BS) with a number of antennas to mobile stations (MSs) with fewer antennas. It will be intractable for a MS to decode the SDM signal by linear space filtering in the case of less degrees of freedom at the MS. Collaborative interference cancellation (CIC) can be applied to decode the SDM signal with the enhancement of degrees of freedom at the MS by sharing other SDM signals received at the surrounding MSs with higher frequency band wireless communications. Short slot reservation time division multiple access (SSR-TDMA) with the function of carrier sense helps it to gain the medium access control (MAC) efficiency at the higher frequency band. In this manuscript, we investigate the effect of frame aggregation and channel bonding incorporated into the SSR-TDMA protocol and show the enhancement of the MAC efficiency.
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  • A Study of SC-FDE for Millimeter-Wave Wideband Transmission System
    Yoshifumi MATSUSAKI, Takayuki NAKAGAWA, Hiroyuki HAMAZUMI
    Article type: Article
    Session ID: BCT2015-72
    Published: October 16, 2015
    Released on J-STAGE: September 22, 2017
    DOIhttps://doi.org/10.11485/itetr.39.38.0_13
    CONFERENCE PROCEEDINGS FREE ACCESS
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    The authors have been studying a single-carrier transmission with frequency domain equalization (SC-FDE) for millimeter-wave band wireless cameras, where compact size and low power consumption are required. The wideband transmission system using SC-FDE method for the expansion of the transmission capacity was studied. Then the deterioration through a millimeter-wave power amplifier and the transmission performance in AWGN and multi-path channels were simulated. As a result, compared with Orthogonal Frequency Division Multiplexing (OFDM), it is showed that the transmission margin in the link budget with 16-Amplitude Phase Shift Keying SC-FDE system can be improved by about 5dB.
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  • Study of Proactive Communication Control Based on mmWave Environment Prediction Using RGB-D Camera
    Takayuki NISHIO, Koji YAMAMOTO, Masahiro MORIKURA
    Article type: Article
    Session ID: BCT2015-73
    Published: October 16, 2015
    Released on J-STAGE: September 22, 2017
    DOIhttps://doi.org/10.11485/itetr.39.38.0_17
    CONFERENCE PROCEEDINGS FREE ACCESS
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    In mmWave communications, a frame loss rate increases and thus throughput is decreased sharply when pedestrians block line-of-sight paths. Such serious human blockage does not occur in microwave communications. In general, reactive communication control is conducted based on measured communication quality. In contrast to this, to solve the problem, we have proposed an RGB and depth (RGB-D) camera based millimeter-wave (mmWave) communication environment prediction and a proactive communication control system using the prediction results. By using the RGB-D camera, we can predict a change of mmWave environment such as human blockage easily since the cameras can detect obstacles and their mobility. In this paper, the framework and the prototype implementations of the RGB-D camera based human blockage prediction and proactive communication control schemes are introduced.
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  • Optical Camera Communications Using Digital Signage
    Hiraku OKADA, Sho SATO, Tadahiro WADA, Takaya YAMAZATO, Masaaki KATAYA ...
    Article type: Article
    Session ID: BCT2015-74
    Published: October 16, 2015
    Released on J-STAGE: September 22, 2017
    DOIhttps://doi.org/10.11485/itetr.39.38.0_21
    CONFERENCE PROCEEDINGS FREE ACCESS
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    In this paper, we discuss optical cammera communication systems using digital signage, which is composed of a liquid crystal display (LCD). The digital signage, which is used as a transmitter, displays advertisement contents as visual information. The optical camera communication system using digital signage has to transmit data information not to obstruct the visual information. In this paper, we propose blue color difference modulation for the optical camera communication system using digital signage. We clarify the performance of the proposed system by data transmission experiments.
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  • [title in Japanese]
    Article type: Appendix
    Pages App1-
    Published: October 16, 2015
    Released on J-STAGE: September 22, 2017
    DOIhttps://doi.org/10.11485/itetr.39.38.0_App1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • [title in Japanese]
    Article type: Appendix
    Pages App2-
    Published: October 16, 2015
    Released on J-STAGE: September 22, 2017
    DOIhttps://doi.org/10.11485/itetr.39.38.0_App2
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • [title in Japanese]
    Article type: Appendix
    Pages App3-
    Published: October 16, 2015
    Released on J-STAGE: September 22, 2017
    DOIhttps://doi.org/10.11485/itetr.39.38.0_App3
    CONFERENCE PROCEEDINGS FREE ACCESS
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