Electronics and Telecommunications Research Institute

Konkuk University Industrial Cooperation Corp

Cheol-Ho Shin

Sangsung Choi

Sang-Sung Choi

Kyu-Min Kang

Mi Kyung Oh

Byoung Hak Kim

Sang-In Cho

Sung-Woo Choi

Kwang-Roh Park

Jaehwan Kim

Young Ae Jeon

Seung Sik Lee

Byoung-Hak Kim

Sangjae Lee

Jae Young Kim

Chang-Joo Kim

Kwang Roh Park

Kang-yoon Lee

Jong Won Kim

Hyung-Soo Lee

Mi-Kyung Oh

Joon-Sung Park

Jae-Hwan Kim

Jin-Gyun Chung

Yong-Eun Kim

Il-Kyoo Lee

YoungGun Pu

A method for controlling an energy storage system (ESS) and devices performing the method are disclosed. A method for controlling an ESS according to example embodiments, the method includes an operation of analyzing energy information of an area for which a peak power load is to be calculated received from a plurality of clients included in the area, an operation of generating, based on an analysis result, scheduling control information for controlling the ESS connected to the plurality of clients on a daily basis, an operation of determining, based on the scheduling control information, whether to generate real-time control information for controlling the ESS on a basis of a predetermined control time period, and an operation of correcting, based on the real-time control information, the scheduling control information.

Method for controlling energy storage system and devices performing method

Disclosed herein is an apparatus for controlling transmit power, including: a global positioning system (GPS) receiving unit receiving GPS signals from one or more satellites and measuring signal strengths of the GPS signals; a processor calculating transmit power corresponding to a current position depending on the GPS signals according to a predefined command; a memory storing the command therein; and a communication interface transmitting a data signal including data depending on the transmit power.

Apparatus and method for controlling transmit power

A method and apparatus of detecting a frame boundary by using a preamble are provided. The method includes delaying the preamble by a predetermined length of time, wherein the preamble includes an LTF and a code of the (n+1)th one of 2n sync sequences of the LTF is the inverse of a code of the last one of the sync sequences of STF; calculating a correlation value between the preamble and the delayed preamble; and detecting a frame boundary by comparing the correlation value with a threshold correlation value.

Method of creating preamble, and method and apparatus for detecting frame boundary

A method of generating a packet for low energy critical infrastructure monitoring (LECIM) wireless communication is provided. The method includes steps of generating a first bit string by multiplexing a physical layer header (PHR) bit and a physical layer service data unit (PSDU) bit; convolution encoding the first bit string; interleaving the convolution-encoded first bit string; generating a second bit string by multiplexing the interleaved first bit string with a synchronization header (SHR) bit; and modulating the second bit string with a frequency shift keying (FSK) method and a position-based FSK method.

Method of generating and receiving packets in low energy critical infrastructure monitoring system

A method of generating a packet of a physical layer transmitter of a TV white space (TVWS) wireless personal area network (WPAN) system operating a WPAN service in TVWS is provided. A packet that is generated by the method of generating the packet includes a preamble, a start frame delimiter that is positioned after the preamble, a first physical layer header that is positioned after the start frame delimiter, and a physical layer service data unit that is positioned after the first physical layer header. Here, the first physical layer header represents whether the packet is a ranging packet for ranging, and includes a ranging packet identification bit corresponding to a reserved bit of the second physical layer header in a SUN system and a LECIM system, and a parity bit.

Method of generating packet, method of transmitting packet, and method of ranging of physical layer transmitter of wireless personal area network system

A transmitting apparatus of a WPAN communication system generates a synchronization header, a physical layer header, and a physical layer service data unit, multiplexes the synchronization header and the physical layer header into a bit stream and then modulates the multiplexed bit stream by a first differential phase modulation scheme, modulates the physical layer service data unit by a second differential phase modulation scheme, and multiplexes and transmits a symbol modulated by the first differential phase modulation scheme and a symbol modulated by the second differential phase modulation scheme into a symbol stream.

Method and apparatus for transmitting wireless personal area network communication system

A receiving apparatus receives an FSK signal, converts the FSK signal into a phasor including amplitude and phase, estimates and compensates for a CFO (carrier frequency offset) from the converted phasor, and recovers a data bit from the converted phasor.

Receiving apparatus and method in smart utility network communication system

To detect a victim signal in an ultra wideband communication system, fast Fourier transform of a received signal including a plurality of time symbols is performed to generate a signal including a plurality of frequency symbols, it is determined whether a first signal is present in a first region of the signal, and if a first signal is present, the first signal is detected as a first victim signal. Next, an error signal is generated based on the signal including the plurality of frequency symbols, it is determined whether a second signal is present in a second region of the error signal, and if a second signal is present, the second signal is detected as a second victim signal.

System and method for detecting victim signal in MB-OFDM UWB communication system

A DAA (Detection And Avoidance) apparatus for use in a UWB receiver includes a frequency offset unit for adding a preset frequency offset to a UWB signal including a victim signal and an FFT unit for performing a fast-Fourier-transformation on the UWB signal with the frequency offset added thereto. The DAA apparatus further includes a DAA unit for detecting a victim signal from the fast-Fourier-transformed UWB signal and, when reception power of the victim signal is higher than a predetermined reference power level, changing a communication channel for the UWB signal to avoid interference.

Detection and avoidance apparatus and method for use in UWB receiver

A transmitting apparatus groups a data bit sequence to groups each formed of a predetermined number of bits, modulates predetermined bits of one of groups through a frequency shift keying (FSK) modulation method, non-continuously aligns the FSK modulation signals, and transmits the non-continuous FSK modulation signals.

Apparatus and method for transmitting and receiving

A digital phase-locked loop apparatus using FSK includes a PFD detecting phase differences between a reference clock and a frequency-divided signal, and a first adder for generating first digital control codes by adding first digital codes, second digital codes, and channel frequency codes including channel information to each other, the first digital codes being converted from time differences between first and second pulses. The apparatus further includes a digital filter correcting errors of the first digital control codes to generate second digital control codes, a DCO for varying an oscillating frequency in accordance with a digital tuning word based on the second digital control codes, and a dual modulus division unit dividing the oscillating frequency into a frequency-divided signal.

Digital phase-locked loop apparatus using frequency shift keying and method of controlling the same

There are disclosed a method of communicating for a smart utility network using a TV white space and an apparatus for the same. The method of communicating for a smart utility network using a TV white space according to the present invention includes: generating a time domain sequence repeated every predetermined number of samples; generating an OFDM symbol having a cyclic prefix length corresponding to an FFT size divided by a natural number of 2 or more and including samples of a number corresponding to the sum of the FFT size and the cyclic prefix length; and generating an SUN packet to be transmitted through a TV channel band selected in the TV white space by using the time domain sequence and the OFDM symbol. Accordingly, it is possible to satisfy all requirements required by the IEEE 802.15.4g SUN standardization group.

Method of communicating for smart utility network using TV white space and apparatus for the same

A communication apparatus generates a digital detection signal including a plurality of time symbols by digital-converting a detection signal corresponding to a received signal, estimates an average power value of the detection signal by calculating average power of the digital detection signal based on the digital detection signal, and performs UWB communication through a predetermined first channel when a predetermined reference power value is greater than the average power value.

Apparatus and method for communication

A parallel equalizer for a DS-CDMA UWB system and method thereof are provided. The parallel equalizer includes: a filter block for filtering a training input signal in a 'training mode', and filtering the plurality of input signals in parallel in a 'symbol decision mode'; a symbol decision block for obtaining a symbol error based on a output from the filter block and a training symbol in the &#x2018;training mode&#x2019;, and estimating a transmission symbol for each of the input signals in the &#x2018;symbol decision mode&#x2019;, obtaining an error of one among the estimated transmission symbols for a symbol error calculating input signal; and an weight update block for updating a filter tap coefficients of the filter block based on the training input signal or the symbol error calculating input signal and the symbol error and transmitting the updated filter tap coefficients into the filter block.

Parallel equalizer for DS-CDMA UWB system and method thereof

Provided is an apparatus and method for detecting a time-frequency code in an MB-OFDM UWB system. The apparatus includes a controller for providing a band selection signal to the RF receiver and outputting a preamble selection signal at regular symbol periods to calculate a cross correlation value for a predetermined time period more than a beacon frame interval when a time-frequency code search start signal is received; and a cross correlator for storing information on preamble patterns, selecting a preamble stored depending on the preamble selection signal, and calculating a cross correlation value for a digital signal transferred through the RF receiver, wherein the controller determines a time-frequency code using a preamble where a peak occurs as a time-frequency code that is currently in use when a peak signal is inputted based on the calculated cross correlation value, and transmits the determined time-frequency code to the MAC receiver.

Growing community of inventors

Daejeon, South Korea

Cheol-Ho Shin