摘要:
A position measuring apparatus receives at least one precise position information set from at least one visible-light wireless communication device including a transmission light source, and upon receipt of the at least one precise position information ser, acquires a virtual distance based on the positions of transmission light sources imaged on an image sensor. Next, the position is measured according to the precise position information and the actual distance, virtual distance, and image sensor inclination based on this information.
摘要:
A transmitting apparatus using visible light communication generates transmission data into a two-dimensional data code according to a predetermined code method between the transmitting apparatus and a receiving apparatus and transmits the two-dimensional data code through a plurality of light emitting diodes (LED) that are arranged in a two-dimensional form. Therefore, the receiving apparatus senses light from a plurality of LEDs as an image using an image sensor, demodulates the image into a two-dimensional data code, decodes the two-dimensional data code using a code book, and restores data.
摘要:
A transmitting apparatus using visible light communication generates a light source control signal from color information representing additional information and transmits additional information with a color of light that is emitted by a light source by controlling an on/off time of a plurality of LEDs according to the light source control signal. Therefore, a user can intuitively know additional information from a color of light that is emitted by the light source.
摘要:
Disclosed are a receiving apparatus and a receiving method. More particularly, disclosed are a receiving apparatus and a receiving method in an OFDM system. The receiving apparatus in the OFDM system includes a receiver for receiving wireless signals transmitted through wireless channels, a transformer for transforming the wireless signals into signals of a frequency domain, an inverse transformer for inversely transforming reference signals into signals of a time domain based on a number of reference signals included in the signals of the frequency domain and an arrangement interval of the reference signals included in the signals of the frequency domain, and a determiner for determining a delay spread based on the inversely transformed signals of the time domain.
摘要:
An image forming apparatus and a control method thereof provides that when circulation of developer in a housing of a developing unit is deteriorated due to concentration of the developer, thus applying increased load to an agitator, the agitator is appropriately rotated forwardly and backwardly under the control of a controller. This may prevent overloading of the agitator and release the concentrated developer.
摘要:
An indicator assembly for a golf club capable of checking a swing trajectory according to the present invention comprises an indicator which is attached to one side of the head of the golf club, has a sheet shape, has a plurality of marks spaced at intervals, and is made of a material that can be scratched by the blow of a golf ball. The indicator assembly for a golf club capable of checking a swing trajectory according to the present invention includes the marks on the indicator that can leave a scratch by colliding with the golf ball, thereby specifying the location of the scratch to determine the user's swing trajectory and the type of the formed pitch.
摘要:
Disclosed are an apparatus for transmitting multi-carrier signals, including: a signal spreading unit configured to generate band-spread signals through band spreading of a plurality of symbol-mapped signals; and a modulation unit configured to generate a modulation signal by mixing the band-spread signals with a plurality of sub-carriers and adding up the mixed band-spread signals, and a method for transmitting multi-carrier signals.
摘要:
Provided are an apparatus and method for generating a multiple output sequence. The apparatus includes an update unit configured to update a first shift register having k stages by inputting a value to the first shift register at every clock, a transfer unit configured to simultaneously transfer, at every clock, output values output from the first shift register to k stages of a second shift register respectively and output values output from k stages of the second shift register to k stages of a third shift register having the k stages respectively, and a multiple output generator configured to generate a multiple output sequence by outputting values of the k stages of the third shift register at every clock.
摘要:
Multiple Input Multiple Output (MIMO) radio communication system and method are provided. A transmitter of the MIMO radio communication system includes an STBC encoding unit, a pre-equalization unit, and a transmit antenna unit. The STBC encoding unit receives a transmit data and performs an STBC encoding to output a plurality of encoded signals. The pre-equalization unit performs a pre-equalization process on the plurality of encoded signals to output a plurality of transmit signals. The transmit antenna unit transmits the plurality of transmit signals at different time. Also, a receiver of the MIMO radio communication system which includes a receive antenna unit, an STBC decoding unit, and a data output unit is provided.
摘要:
Provided are a method and apparatus for allocating DeModulation Reference Signals (DMRSs). The method includes generating DMRSs, and allocating the DMRSs at consecutive subcarrier positions with respect to all the transmit (TX) antennas of each User Equipment (UE) and allocating the DMRSs at different subcarrier positions with respect to each TX antenna of the UE.