Reseach

Knowledge Cluster

Brief

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������֥����ɥХ�ɥ磻��쥹�̿�����ե�Ȥ������ܤ���Ƥ����å���ͥåȥ�������Ѥ��뾭 ��Υ�ӥ������Ҳ�ˤ����Ƥ�,�ϥ��ӥ��������ʸ�����MPEG2 �����Ǥʤ�������ǥ����륷�ͥ޵��� JPEG2000 ��ޤ�ơˤ��������ۿ���,�ۡ��ॷ������,TV ���,���ŵ��ؤʤɤǾ��Ȼ��֤���鷺��ͳ���� �ѤǤ��뤳�Ȥ�˾�ޤ��.�������ʤ���,�����Υ磻��쥹�̿�����ե�ʷ��������֤ϸ����˵ڤФ����Ū ��®��̵��LAN ��ޤ�ơˤǤ�,600Mbps �ʾ�������졼�Ȥ�ɬ�פȤ���ǥ����륷�ͥޤΥ磻��쥹�����ϵ� ��Ū�˺���Ǥ���. ������,�ܸ���Ǥ�,�磻��쥹����å���ͥåȥ���Ǥ��ۿ���Ŭ���������륷�ͥ�ư�����磻��쥹 ���������ƥ�γ�ȯ��Ԥʤ���ΤǤ���.�����Ǥ�,�ǹ��1.5Gbps ��������졼�Ȥ�ͭ���������ǹ�®MIMO ̵��LAN �����ƥ��LSI ���߷פȥǥ����륷�ͥޤΥ������ƥ��������Ѥγ�ȯ�������Ȥʤ�.

The development of transmission systems for digital cinema in the wireless network is attracting attention as next-generation broadband wireless communication infrastructure that the transmission of high-definition images (currently not only MPEG2 but also JPEG2000 for the next-generation digital cinema standards) freely distributes at any available place and time such as for home theater, TV conference, and in a medical institution. However, the present wireless communications infrastructure (the mobile telephone network and high-speed wireless LAN) is technically difficult to reach transmission rates more than 600Mbps for digital cinema wireless transmission. Therefore, in this study, we develop the wireless transmission system for digital cinema image. ]We design and develop up to 1.5Gbps data transmission rate which is the fastest MIMO wireless LAN in the world.

Purpose

��A�� Ķ��®MIMO ̵��LAN �����ƥ�γ�ȯ�� 600M-1.5Gbps �ι�®�����졼�Ȥ�ͭ����MIMO ̵��LAN ��ʪ���� ��MAC �ؤΣ����åײ��߷פ�»ܤ���.�����ƥม�ڤΤ����FPGA �ܡ��ɤ����,�ºݤ˲��������¸��� �»ܤ���.600Mbps �ޤǤ�,������̵��LAN ɸ�ಽIEEE802.11��ʤ˽�򤵤�,1.5Gbps �������졼�Ȥ��� �����ʤ������߷פ���.

��B��MIMO ��RF ��ϩ�Σ����åײ��߷ס� ����ꥢ���ȿ�5GHz,40MHz �Ӱ�ǣ�����MIMO ̵��LAN ��RF ��ϩ�Σ� ���åײ��߷פ�»ܤ���.������ޤ��ϸ������ʤǥ⥸�塼��Ȥ��Ƴ�ȯ�����Ѳ���,���θ�CMOS1 ���åײ��߷פޤǼ»ܤ�, ����������������ϲ���ޤ��̻����˸�����.

��C��JPEG2000 �����Υ������ƥ��Ź沽���Ѥγ�ȯ�� ̵��LAN �ϥѥ��å��̿��Ǥ���,�ޤ�JPEG2000 �����ϳ� �����ˤ�륹������ӥ�ƥ���ͭ������ħ������.��������ħ��,Wavelet �Ѵ��ˤ���Ż�Ʃ�������Ѥ��� ����ݸ�Ѥ�Ŭ���Ƥ���.�ܳ�ȯ�Ǥ�,��������Wavelet �Ѵ��Ż�Ʃ�������Ѥ���äȤ���,����˥ͥåȥ� ������Ǥ�����������������������ͭ��������ʤ����Ͼ���ǡ����Υ������ƥ��Ź沽���Ѥ�ȯ����.

��A��High speed MIMO wireless LAN system for 600Mbps-1.5Gbps data rate with high-speed MIMO wireless LAN MAC and physical layer implementation and its chip level design. FPGA and manufacture boards for system verification and real implementation. The next generation wireless LAN standard related to IEEE802.11n can reach up to 600 Mbps. Thus, it is necessary to design own standard for transmission rate up to 1.5Gbps.

��B��Design of MIMO RF single chip circuit in 5GHz carrier frequency, and 40MHz bandwidth 4x4MIMO. Developed and commercialized the first module of these discrete components, then carried our to a CMOS1 design chip, and finally the mass production of compact and low power consumption.

��C��JPEG2000 image security encryption technology. Wireless LAN is a packet, and JPEG2000 image coding is characterized by a scalable hierarchy. These features, Wavelet technology is suitable for copyright protection watermarking transformation. In our work, the Wavelet transform based watermarking techniques are used in information and data security encryption technology image development for resisting unauthorized access on the network.