Patents Assigned to SOLID, INC.
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Publication number: 20170201312Abstract: A communication module assembly includes a case; a communication module accommodated in the case and including at least two module terminals; and a connection member including connection terminals respectively connected to the module terminals, and a bridge unit configured to connect the connection terminals, wherein when the connection terminals and the module terminals are disconnected, the connection terminals are electrically connected to each other through the bridge unit.Type: ApplicationFiled: January 4, 2017Publication date: July 13, 2017Applicant: SOLiD, INC.Inventor: Sejun NA
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Publication number: 20170194986Abstract: A data compression device includes an analog to digital converter (ADC) configured to convert an analog signal into a digital signal including in-phase and quadrature components; and a compressor configured to generate a 28-bit fixed-point digital signal in which bits of the in-phase and quadrature components are alternately arranged, generate an exponent bit string by comparing n most significant bits of a data bit string excluding two sign bits in the 28-bit fixed-point digital signal with preset mapping data, wherein the exponent bit string includes 4 bits, generate a mantissa bit string composed of 14 bits corresponding to up to 14th bit from a bit next to the n most significant bits of the data bit string, and generate a 20-bit floating point digital signal by combining the two sign bits, the exponent bit string, and the mantissa bit string, wherein n is a natural number equal to or greater than 2 and equal to or less than 12.Type: ApplicationFiled: January 4, 2017Publication date: July 6, 2017Applicant: SOLiD, INC.Inventors: Donghoon HONG, Hosik JANG, Youngin KIM
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Publication number: 20170195036Abstract: An interference cancellation repeater including a subtractor configured to subtract an estimated signal from a digital reception signal and output an interference canceled signal; a first power calculator configured to calculate power of the digital reception signal; a second power calculator configured to calculate power of the interference canceled signal; and an attenuation controller configured to compare a power value of the calculated digital reception signal with a power value of the calculated interference canceled signal and determine an attenuation value of the interference canceled signal according to the comparison result.Type: ApplicationFiled: December 30, 2016Publication date: July 6, 2017Applicant: SOLID, INC.Inventors: Nagwon KWON, Hyunchae KIM
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Publication number: 20170195073Abstract: A repeater including an analog attenuator configured to attenuate an analog signal in response to a first control signal; an analog to digital converter (ADC) configured to convert the attenuated analog signal into a digital signal; a digital attenuator configured to attenuate the digital signal in response to a second control signal; and an attenuation controller configured to calculate average power and peak power of the attenuated digital signal, determine an attenuation value for each value of the calculated average power and peak power, and generate at least one of the first and second control signals based on the determined attenuation values.Type: ApplicationFiled: December 30, 2016Publication date: July 6, 2017Applicant: SOLiD, INC.Inventors: Nagwon KWON, Hyunchae KIM
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Publication number: 20170187449Abstract: An interference cancellation repeater for canceling an interference signal included in an input signal including a first adaptive filter configured to generate a first estimated signal; a second adaptive filter configured to generate a second estimated signal; a first scaler configured to scale the first estimated signal based on a first scale factor determined according to a channel state; a second scaler configured to scale the second estimated signal based on a second scale factor determined according to the channel state; a first canceller configured to generate a first interference canceled signal based on the input signal and the scaled first estimated signal; and a second canceller configured to generate a second interference canceled signal based on the first interference canceled signal and the scaled second estimated signal.Type: ApplicationFiled: December 27, 2016Publication date: June 29, 2017Applicant: SOLID, INC.Inventors: Nagwon KWON, Hyunchae KIM
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Publication number: 20170187448Abstract: An interference cancellation repeater configured to cancel an interference signal included in an input signal, the interference cancellation repeater including: a canceller configured to generate an interference canceled signal based on the input signal and an estimated signal; a digital filter configured to filter the interference canceled signal to generate an output signal; an interference signal detector configured to generate interference signal existence interval information using the input signal and the output signal; and an adaptive filter configured to receive the interference canceled signal and the output signal, and generate the estimated signal based on the interference signal existence interval information.Type: ApplicationFiled: December 27, 2016Publication date: June 29, 2017Applicant: SOLiD, INC.Inventors: Nagwon KWON, Hyunchae KIM
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Publication number: 20170187550Abstract: A peak cancellation-crest factor reduction (PC-CFR) device includes a clipping unit configured to output a clipping error signal by clipping amplitude values of a first baseband complex signal based on a predetermined threshold value; a peak value determination unit configured to receive the clipping error signal, and determine a first amplitude value as a peak value when the first amplitude value is greater than a second amplitude value input before the first amplitude value and a third amplitude value input after the first amplitude value among amplitude values of the clipping error signal; a cancellation pulse generator (CPG) allocation unit configured to allocate the peak value to a CPG; and a subtractor configured to subtract a cancellation pulse generated from the CPG from the first baseband complex signal and output a second baseband complex signal with a reduced peak-to-average power ratio (PAPR).Type: ApplicationFiled: March 15, 2017Publication date: June 29, 2017Applicant: SOLiD, INC.Inventors: Doyoon KIM, Kwangnam SEO
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Publication number: 20170187561Abstract: According to an aspect of the inventive concept, there is provided a crest factor reduction (CFR) core, including: a clipper clipping an input signal; a delay unit delaying the input signal; a first subtractor subtracting the clipped input signal from the delayed input signal; an error shaping filter filtering the subtracted signal for shaping an error which occurs by the clipping of the input signal; a digital filter filtering the input signal for cancelling noise of the input signal; and a second subtractor subtracting the filtered subtracted signal from the filtered input signal.Type: ApplicationFiled: December 27, 2016Publication date: June 29, 2017Applicant: SOLiD, INC.Inventors: Nagwon KWON, Hyunchae KIM
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Publication number: 20170180186Abstract: A monitoring device for a distributed antenna system including at least two node units communicatively coupled to each other transmits, to at least one target node unit among the node units, a data dump command for a first target signal passing through a first signal path in the target node unit. The monitoring device receives, from the target node unit, response data corresponding to the data dump command. The monitoring device generates first quality information indicative of the quality of the first target signal by using the response data.Type: ApplicationFiled: March 7, 2017Publication date: June 22, 2017Applicant: SOLiD, INC.Inventor: Doyoon KIM
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Publication number: 20170149505Abstract: A distributed antenna system includes a headend device for generating a downlink transmission signal by combining a plurality of downlink RF signals in different frequency bands, received from a plurality of base stations, and converting the downlink transmission signal into a downlink optical signal, a main remote device for receiving the downlink optical signal from the headend device, converting the downlink optical signal into the downlink transmission signal, and amplifying the plurality of downlink RF signals included in the downlink transmission signal, and a sub-remote device for receiving the downlink transmission signal distributed from the main remote device, and amplifying the plurality of downlink RF signals included in the received downlink transmission signal.Type: ApplicationFiled: February 7, 2017Publication date: May 25, 2017Applicant: SOLID, INC.Inventors: Yeongshin YEO, Hwansun LEE, Youngju YOU
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Publication number: 20170149550Abstract: According to an aspect of the inventive concept, there is provided a master unit included in a distributed antenna system of a frequency division duplex scheme, includes: a frequency converting unit converting a frequency of a first signal received from a base station into a predetermined frequency to generate a first frequency conversion signal; a signal combining unit combining the first frequency conversion signal and a second signal received from the base station to generate a transmit signal; and a signal transmitting/receiving unit transmitting the transmit signal to a remote unit connected through a single transmission line.Type: ApplicationFiled: February 1, 2017Publication date: May 25, 2017Applicant: SOLiD, INC.Inventor: Jaehun CHOI
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Patent number: 9660717Abstract: A base station signal matching device configured to receive a base station signal from a base transceiver station (BTS), the base station signal matching device is embedded in a relay device, and the base station signal matching device includes a signal attenuation unit configured to receive the base station signal and attenuate the input power level of the base station signal; and a signal matching unit configured to receive the base station signal passing through the signal attenuation unit to match the base station signal suitable for signal processing of the relay device.Type: GrantFiled: August 14, 2014Date of Patent: May 23, 2017Assignee: SOLID, INC.Inventor: Kyung Eun Han
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Publication number: 20170141836Abstract: Provided is a multi-antenna relay device. The multi-antenna relay device having first to n-th (n is a natural number of 2 or more) channel formed between receiving antennas and transmitting antennas corresponding to each other, comprising: first to n-th channel interference cancellation units, respectively, included in a corresponding channel among the first to n-th channels and canceling first to n-th channel interference signals corresponding to signals radiated through the first to n-th channels from signal input into the corresponding channel in real time.Type: ApplicationFiled: April 9, 2014Publication date: May 18, 2017Applicant: SOLiD, INC.Inventor: Hyunchae KIM
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Publication number: 20170126362Abstract: A technology related to a distributed antenna system is disclosed. In an exemplary embodiment, a distributed antenna system may include a master unit and a plurality of remote units. The master unit may be interfaced with a wireless communications network and perform a bidirectional simultaneous digital radio frequency distribution of a wireless signal. The plurality of remote units may be each coupled to the master unit, and each perform a wireless transmission or reception of a split radio frequency signal to or from terminals located within a coverage. The master unit and the plurality of remote units may transmit or receive digital radio frequency signals in a wavelet transform domain. The master unit may determine whether the digital radio frequency signal, transmitted by each of the remote units, is normal, and merge the digital radio frequency signals.Type: ApplicationFiled: April 6, 2016Publication date: May 4, 2017Applicant: SOLiD Inc.Inventor: Young Man CHO
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Publication number: 20170117977Abstract: A node unit of distributed antenna system, the node unit comprises a delay measuring part configured to transmit a first test signal for delay measurement to an upper adjacent node unit and detect the first test signal looped back via the upper adjacent node unit and measure a round trip delay between the node unit and the upper adjacent node unit, and a delay providing part disposed on a signal transmission path through which a second test signal for delay measurement, to be transmitted from a lower adjacent node unit, is to be looped back to the lower adjacent node unit, and configured to provide a delay corresponding to the round trip delay.Type: ApplicationFiled: January 9, 2017Publication date: April 27, 2017Applicant: SOLID, INC.Inventors: Hyoungho KIM, Doyoon KIM, Yeongshin YEO
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Publication number: 20170118768Abstract: The inventive concept relates to a distributed antenna system (DAS), and more particularly, to an uplink signal transmission operation of each of node units constituting a DAS. A node unit of a DAS includes a multiplexer configured to generate a single uplink signal by selectively outputting any one of m uplink signals received from m lower node units at an interval of a predetermined output time, where m is a positive integer greater than 1, and a down-sampler configured to output a transmission uplink signal by converting a sampling rate of the single uplink signal to correspond to a sampling rate of any one of the m uplink signals. Accordingly, it is possible to provide a DAS capable of processing and outputting, as one signal, uplink signals received from a plurality of remote units, without any error.Type: ApplicationFiled: January 9, 2017Publication date: April 27, 2017Applicant: SOLID, INC.Inventors: Kwangnam SEO, Hyoungho KIM, Doyoon KIM
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Publication number: 20170111717Abstract: A master unit configured to manage a plurality of remote units connected in a ring topology, the master unit comprising: a network management section configured to transmit at least one of a path-state monitoring control signal and a delay measurement control signal to the plurality of remote units in a first direction and a second direction which is a reverse direction of the first direction, and receives an acknowledgement signal in response to the at least one of a path-state monitoring control signal and a delay measurement control signal; and switching control means for transmitting a forward signal received from a base station in the first direction, and transmitting a switching control signal in the second direction when a defect is detected in any remote unit among the plurality of remote units by the network management section.Type: ApplicationFiled: December 28, 2016Publication date: April 20, 2017Applicant: SOLID, INC.Inventors: Do Yoon KIM, Kwang Nam SEO, Hee Gon KIM
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Publication number: 20170111957Abstract: A signal processing device according to an exemplary embodiment of the inventive concept can integrate a power amplifier, a duplexer, and a linearizer as a module to improve the convenience of management and to improve flexibility and extensibility so as to be transformable corresponding to a change in system development concept.Type: ApplicationFiled: December 30, 2016Publication date: April 20, 2017Applicant: SOLiD, INC.Inventor: Hwansun LEE
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Patent number: 9629008Abstract: A monitoring device for a distributed antenna system including at least two node units communicatively coupled to each other transmits, to at least one target node unit among the node units, a data dump command for a first target signal passing through a first signal path in the target node unit. The monitoring device receives, from the target node unit, response data corresponding to the data dump command. The monitoring device generates first quality information indicative of the quality of the first target signal by using the response data.Type: GrantFiled: March 30, 2016Date of Patent: April 18, 2017Assignee: SOLID, INC.Inventor: Doyoon Kim
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Patent number: 9608847Abstract: A device included in an analog distributed antenna system includes a first analog signal processing unit for receiving an analog communication signal, a first modulation/demodulation unit for converting a digital Ethernet signal received from an Ethernet network into an analog Ethernet signal, a multiplexing unit for multiplexing the analog communication signal signal-processed by the analog signal processing unit and the analog Ethernet signal converted by the modulation/demodulation unit, and a transmission unit for transmitting, to other devices included in the analog distributed antenna system, the analog communication signal and the analog Ethernet signal, which are multiplexed by the multiplexing unit.Type: GrantFiled: March 24, 2016Date of Patent: March 28, 2017Assignee: SOLID, INC.Inventor: Yeongshin Yeo