Abstract:
An apparatus and a method of channel estimation and equalization based on pilot signals, which acquire a channel estimation vector and effectively perform channel equalization by using scattered pilots and continuous pilots in a communication system to which an OFDM symbol is applied, such as a DOCSIS 3.1 Down stream PHY system using multiple carriers.
Abstract:
Disclosed are a system and method for informing photographing using wireless communication, in which a mobile terminal whose photographing function is activated may transmit photographing function activated state information using wireless communication so that surrounding mobile terminals may recognize the transmitted information, and when the corresponding terminal is located in a photographing prohibited area, this may be informed to induce photographing restriction.
Abstract:
Disclosed is a capacitive-coupled comb-line microstrip array antenna including a dielectric substrate, first and second feeding lines formed on one surface of the dielectric substrate and in parallel branched from a feeding line connected to an input port, and microstrip patches intersected and arranged in a way to be partially overlapped within an area where the parallel first and second feeding lines are formed to face each other. The microstrip patches include a first group of microstrip patches formed in a direction orthogonal to the first feeding line with a gap between the microstrip patches and the first feeding line and a second group of microstrip patches formed in a direction orthogonal to the second feeding line with a gap between the microstrip patches and the second feeding line.
Abstract:
A user customized training system according to the present invention includes a sensor module configured to sense a user's motion; a memory in which a program for training is stored; and a processor configured to execute the program stored in the memory, wherein, when the program is executed, the processor acquires coordinates that correspond to the sensed motion, compares the user's motion with pre-stored erroneous motions on the basis of body information generated on the basis of the coordinates, provides a pre-stored set of motion data when a result of the comparison indicates that the user's motion corresponds to an erroneous motion, and, when the sensor module senses a motion of the user corresponding to the set of motion data, provides a training set corresponding to a result of analyzing the sensed motion.
Abstract:
An apparatus and a method for managing instant connection based on a wireless local area network are provided. The method includes: creating, by an accessed terminal, connection information required for setting connection therewith; creating, by the accessed terminal, a management frame by using the connection information; transmitting, by the accessed terminal, the created management frame to a peripheral terminal; receiving, by the peripheral terminal, the management frame and extracting connection information from the received management frame; and setting, by the peripheral terminal, connection with the accessed terminal by accessing the accessed terminal by using the extracted connection information to rapidly access a desired terminal without performing a device discovery process.
Abstract:
An apparatus for providing information about an available service using a proxy server and a method thereof. The apparatus includes an available service checker, a database, an available service searcher, and an available service broadcaster. The apparatus may provide information through the proxy server regarding available services of a device that is not currently connected to a basic service set (BSS), thereby preventing generation of excessive amount of traffic.
Abstract:
Disclosed are a method and apparatus for estimating symbol timing in a non-synchronized OFDM system. The present invention includes synchronizing a frame of a received signal, estimating the symbol timing of each symbol of the frame based on the synchronization, compensating for the symbol timing using a phase difference attributable to a Symbol Timing Offset (STO), variably changing within a Cyclic Prefix (CP) interval due to the frequency offset of a sampling clock and thermal noise, and performing channel equalization using a preamble based on output including corrected phase rotation.
Abstract:
An apparatus for combining a broadcasting channel may include a channel detector to detect a vacant Radio Frequency (RF) broadcasting channel used by a photoelectric converter that converts a first broadcast program as an optical signal to a first RF signal, a broadcast receiving interface to receive at least one second broadcast program, a broadcast modulator to generate a second RF signal by modulating the second broadcast program using the vacant RF broadcasting channel, and a channel combiner to combine a broadcasting channel used for the first RF signal and the vacant RF broadcasting channel.