Electronics and Telecommunications Research Institute

Hey Jin Myoung

Sung Eun Kim

Kyung Soo Kim

Tae Wook Kang

Sung Weon Kang

In Gi Lim

Jung Bum Kim

Jung Hwan Hwang

Chang Hee Hyoung

Hyung Il Park

Kyung Hwan Park

Seok Bong Hyun

Tae Young Kang

Byoung Gun Choi

Jae Hoon Shim

Jin Kyung Kim

Ki Hyuk Park

Seung Youl Kang

Gi Heon Kim

Kyung Soo Suh

Chul Am Kim

Jin-Kyung Kim

In Kyu You

Seong Deok Ahn

Ji Young Oh

A frequency selective digital transmission apparatus includes: a preamble transmission processing unit generating a preamble for frame synchronization and spreading the generated preamble with a predetermined spreading code; a header transmission processing unit configuring a header including data attribute information and spreading the header with a predetermined spreading code; a data transmission processing unit performing serial-to-parallel conversion on transmission data according to a selected transmission mode and a spreading scheme and spreading the same with a frequency selective spreading code; and a multiplexing unit multiplexing the preamble, the header, and the data which have been spread by the preamble transmission processing unit, the header transmission processing unit and the data transmission processing unit, respectively, and transmitting the same as digital signals.

Frequency selective digital transmission apparatus

There is provided a communication method using a human body as a medium. A modulation apparatus using a frequency selective baseband according to an aspect of the invention may include: a serial-to-parallel conversion unit converting serial data supplied from an upper layer into parallel data consisting of M+1 number of data input bits; and a frequency selective spreader selecting one subgroup among a plurality of subgroups obtained by dividing 2number (where N is a positive integer) of spreading codes used for frequency spreading by 2(where M is a positive integer, and M&#x3c;N is satisfied), and selecting and outputting one spreading code among 2number of spreading codes of the one subgroup by using the M number of data input bits, and spreading codes obtained by performing bit circular shifts on the 2number of spreading codes. Accordingly, the number of transmission data is increased to improve a transmission data rate, strong interference induced from users and other electronic devices is reduced, and stable human body communication having low power consumption is performed.

Modulation and demodulation apparatus using frequency selective baseband and transmission and reception apparatus using the same

The present invention relates to a powerless electronic notepad and a powerless wireless transmission system using the same, and more particularly, to a powerless electronic notepad that stores data recorded on an electronic notepad using piezoelectric elements and transmits the stored data using a passive RFID tag without the use of a power source, and a powerless wireless transmission system using the same.

Powerless electronic notepad and powerless wireless transmission system using the same

An adaptive frequency selective baseband communications method using orthogonal codes includes: a communications testing step of performing communications by using one of a plurality of codes each having a different frequency band; a proper code selecting step of selecting a proper code by using a correlation value of a plurality of codes included in test data transmitted in the communications testing step; a communications performing step of performing communications by using the proper code; and a feedback step of newly selecting a proper code by using the correlation value of the plurality of codes included in the test data transmitted in the communications performing step if a pre-set time duration has lapsed or if a reception error of more than a pre-set reference occurs, and performing the communications performing step again, wherein the test data transmitted in the communications testing step and the communications performing step includes a plurality of codes each having a different frequency band.

Adaptive frequency selective baseband communications method using orthogonal codes

Provided is a microcapsule patterning method for patterning electrophoretic microcapsules on a substrate, the method including the steps of: preparing a microcapsule slurry in which microcapsules and a water-soluble binder are mixed; putting the microcapsule slurry into a liquid ejector having injection and ejection ports formed therein; and applying the microcapsule slurry contained in the liquid ejector onto the substrate so as to pattern pixels using the microcapsules. Accordingly, specific patterns are formed without physical and chemical damage to the microcapsules. Therefore, the patterns can be used as pixels of flat panel displays. Further, through the patterning, it is possible to implement a color display device which does not exhibit performance degradation.

Microcapsule patterning method

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Daejeon, South Korea

Hey Jin Myoung