Abstract:
Provided are a system and method for human body communication using a limited passband. The system includes a transmission frame generating unit for human body communication which generates a transmission frame for human body communication based on data information including user identification (ID) and data scrambled into an orthogonal code generated by the user ID; a symbol mapping unit for symbolizing the generated transmission frame for human body communication according to a predetermined modulating method; a spreading unit for spreading the symbol outputted in the symbol mapping unit; a waveform generating unit for generating a baseband signal whose band is limited to a predetermined range with respect to the data spread in the spreading unit; and a middle band transmitting unit for modulating the baseband signal into a predetermined limited passband signal.
Abstract:
An apparatus for realizing a three-dimensional (3D) neural network includes a culture substrate (21) having a 3D structure and a plurality of microelectrodes (22) disposed on the culture substrate (21) in such a manner that neurons are cultured with a 3D structure. The central portion of the culture substrate (21) is shaped in a hemispheric form and a peripheral portion is shaped in a planar form. A plurality of outside connection electrodes (23) are disposed on the peripheral portion so as to be connected to an external device, and a plurality of electrode-connecting lines (24) connecting the microelectrodes (22) to the outside connection electrodes (23) are disposed on the culture substrate (21) as well.
Abstract:
Provided are a digital communication system using frequency selective baseband and a method thereof. A transmitter of the digital communication system, includes: a preamble/header transmission processing unit for spreading a preamble for frame synchronization and a header including data information; a data transmission processing unit for spreading data by using spread codes having dominant frequency in a desired frequency band, i.e., frequency selective spread codes; and a multiplexer for multiplexing the spreaded preamble and the spreaded header from the preamble/header transmission processing unit and the frequency selective spreaded data from the data transmission processing unit and transmitting the multiplexed signal in digital.
Abstract:
The present invention relates to ranging response message generating and processing methods that can reduce overhead in a wireless portable Internet system. A method of generating a ranging response message according to an exemplary embodiment of the present invention includes: adding to the ranging response message a first field indicating the number of responses for CDMA codes included in the ranging response message and received from terminals; adding to the ranging response message second fields indicating ranging code attributes as the responses for the CDMA codes by a value of the first field; and adding to the ranging response message a plurality of third fields indicating transmission parameter adjustment values corresponding to the individual second fields.