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公开(公告)号：US11824596B2
公开(公告)日：2023-11-21
申请号：US17603710
申请日：2020-04-20
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Toshiro Nakahira , Tomoki Murakami , Hirantha Abeysekera , Koichi Ishihara , Takafumi Hayashi , Yasushi Takatori
Abstract: An operation test method of a base station to which a plurality of terminal stations are connectable, the method including switching a specific radio communication unit of a plurality of radio communication units to a subordinate mode and setting another radio communication unit of the plurality of radio communication units to a normal mode, the normal mode being a mode in which each of the plurality of radio communication units performs radio communication as a base station, the subordinate mode being a mode in which each of the plurality of radio communication units performs radio communication as a virtual terminal station, each of the plurality of radio communication units being switchable between the normal mode and the subordinate mode, and conducting an operation test of the base station by performing, based on a test policy that sets the operation test, radio communication between the specific radio communication unit switched to the subordinate mode and the other radio communication unit in the normal mode.
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公开(公告)号：US20210265982A1
公开(公告)日：2021-08-26
申请号：US17196946
申请日：2021-03-09
Applicant: MediaTek Inc.
Inventor： Jen-Huan Tsai , Chih-Hong Lou
Abstract: The invention provides a system improving signal handling, e.g., transmission and/or processing. In an embodiment, the system may include a filter circuit, a magnitude bit truncation circuit and a utility circuit. The filter circuit may be coupled to a target signal which contains one or more desired signals at one or more interested bands, for attenuating each said interested band to form a filtered signal. The magnitude bit truncation circuit may be coupled to the filter circuit, for truncating one or more bits of each sample of the filtered signal to form a truncated signal. The utility circuit may be coupled to the magnitude bit truncation circuit, for handling the truncated signal to implement handling of the target signal, so as to reduce resource requirement and enhance error tolerance comparing with directly handling the target signal.
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公开(公告)号：USRE48272E1
公开(公告)日：2020-10-20
申请号：US15434964
申请日：2017-02-16
Applicant: Sony Corporation
Inventor： Yuuki Matsumura , Shiro Suzuki , Keisuke Toyama , Mitsuyuki Hatanaka , Yuhki Mitsufuji
IPC: H04B14/06 , G10L19/032
Abstract: There is provided an audio coding device which appropriately sets the quantization bit number by a small calculation amount in each stage when coding an input audio signal by performing multi-stage normalization/quantization. A quantization information calculation section determines total quantization information idwl0, based on normalization information idsf, and allocates the total quantization information idwl0 for quantization information idwl1 and quantization information idwl2. At this time, the quantization information calculation section limits the quantization information idwl1 by a limiter lim1, and allocates the total quantization information idwl0 for quantization information idwl1. If the quantization information idwl1 exceeds the limiter lim1, the excess is allocated for the quantization information idwl2. A first normalization section and a first quantization section normalizes and quantizes a frequency spectrum mdspec1 in the first stage. A second normalization section and a second quantization section normalizes and quantizes a differential frequency spectrum mdspec2 in the second stage.
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公开(公告)号：US10763885B2
公开(公告)日：2020-09-01
申请号：US16675051
申请日：2019-11-05
Applicant: STMicroelectronics S.r.l.
Inventor： Marta Gómez Correa , Fabio Dell'Orto , Muhammad Umair Saeed
IPC: H04B14/06 , H03M3/04 , G10L19/04 , G10L19/008 , H03M7/36 , G10L19/005
Abstract: In an embodiment, a method includes: receiving an audio frame; decomposing the received audio frame into M sub-band pulse-code modulation (PCM) audio frames, where M is a positive integer number; predicting a PCM sample of one sub-band PCM audio frame of the M sub-band PCM audio frames; comparing the predicted PCM sample with a corresponding received PCM sample to generate a prediction error sample; comparing an instantaneous absolute value of the prediction error sample with a threshold; and replacing the corresponding received PCM sample with a value based on the predicted PCM sample when the instantaneous absolute value of the prediction error sample is greater than the threshold.
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公开(公告)号：US10742332B2
公开(公告)日：2020-08-11
申请号：US16658224
申请日：2019-10-21
Inventor： Arnaud Casagrande , Thierry Scordilis , Luca De Rosa , Jean Gorisse , Jean-Luc Arend
Abstract: A transmitter-receiver includes an electronic chip a mixer for mixing the frequency of a received radio frequency signal with that of an oscillating signal supplied by a first frequency synthesizer in, a switch having two inputs connected to an output of the mixer and to an auxiliary input terminal, a filter and gain stage connected to the output of the switch, and a modulator-demodulator connected to the output of the filter and gain stage. The first frequency synthesizer is connected between the output of the modulator-demodulator and radio frequency input and output terminal, and configured to supply a frequency-modulated signal to the radio frequency input and output terminal. The electronic chip further includes a second frequency synthesizer connected between the output of the modulator-demodulator and an auxiliary output terminal, and configured to synthesize a modulated low-frequency signal supplied by the auxiliary output terminal, whereby the center value of the low frequency is equal to the value of the intermediate frequency.
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Patent Agency Ranking
公开(公告)号：US20190132166A1
公开(公告)日：2019-05-02
申请号：US16174200
申请日：2018-10-29
Applicant: Terawave, LLC
Inventor： Torsten Schultze
Abstract: A data communications system and method having high spectral efficiency. The method includes encoding input digital data using a plurality of symbol waveforms. Each symbol waveform occupies a period of a composite encoded waveform and represents one or more bits of the input digital data. Each symbol waveform has a first elliptical segment and a second elliptical segment of opposite polarity. The encoding includes defining each symbol waveform so that (i) a zero crossing from the first elliptical segment to the second elliptical segment of the symbol waveform is different for each of the symbol waveforms, and (ii) an energy of the first elliptical segment of the symbol waveform is substantially equal to an energy of the second elliptical segment of the symbol waveform. An encoded analog waveform is generated, using a digital-to-analog converter, from a digital representation of the composite encoded waveform.
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公开(公告)号：US20180356654A1
公开(公告)日：2018-12-13
申请号：US16002231
申请日：2018-06-07
Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
Inventor： Taizo TATSUMI
CPC classification number: G02F1/0121 , G02F1/2257 , H01S5/0427 , H03K3/356113 , H04B10/501 , H04B14/06
Abstract: A level shift circuit lowers a voltage of a first differential signal by a second voltage value and outputs a lowered first differential signal as a second differential signal. A first differential circuit receives the first differential signal and outputs a third differential signal. A second emitter follower circuit receives the third differential signal at a base of a pair of second transistors. A second differential circuit receives the second differential signal at a base of a pair of third transistors. An output terminal is electrically connected to one of a first output node electrically connected to an emitter of the one of the second transistors and a collector of the one of the third transistors and a second output node electrically connected to an emitter of the another of the second transistors and a collector of the another of the third transistors and outputs a driving signal.
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公开(公告)号：US09673915B2
公开(公告)日：2017-06-06
申请号：US15287984
申请日：2016-10-07
Applicant: Redline Communications Inc.
Inventor： Shailender Potharaju
IPC: H04B14/06 , H04B17/11 , H04B7/0413 , H04L1/00 , H04L27/34
CPC classification number: H04B17/11 , H04B7/0413 , H04L1/0015 , H04L1/002 , H04L27/34
Abstract: A method for calibrating rates at which data is transmitted in a communication system. There is a short transmission utilizing a first set of communication parameters comprising first and second communication parameters. The first set of communication parameters are different from the second set of communication parameters used to create stable communication between the transmitter and receiver. The second set of communication parameters comprise first and second communication parameters. Then determining that there are substantially no errors associated with reception of the short transmission by the receiver. Then transmitting a long transmission utilizing a third set of communication parameters comprising first and second communication parameters. The first communication parameter of the third set is equal to the first communication parameter of the first set. The second communication parameter of the third set is equal to the second communication parameter of the second set.
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公开(公告)号：US09602223B2
公开(公告)日：2017-03-21
申请号：US14693199
申请日：2015-04-22
Applicant: COMMSCOPE TECHNOLOGIES LLC
Inventor： Van E. Hanson
CPC classification number: H04B14/066 , H04B1/0007 , H04B14/046 , H04H20/06 , H04H20/26 , H04H20/69 , H04H60/13 , H04N7/17309 , H04W88/085
Abstract: Transport of differential signals is provided. In one aspect, a telecommunications system includes a first unit and a second unit. The first unit can calculate a differential signal from an original signal. The differential signal can represent a change in signal levels between constant time intervals in the original signal. The second unit can estimate the original signal from the differential signal received from the first unit over a communication medium.
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公开(公告)号：US09531416B2
公开(公告)日：2016-12-27
申请号：US14650552
申请日：2013-12-06
Applicant: THALES
Inventor： Rodolphe Nasta , Thierry Populus
CPC classification number: H04B1/1036 , H04B7/18515 , H04B2001/1072
Abstract: A receiver for radiofrequency signals designed to be installed on board a satellite comprises: a device for frequency controlling the receiver allowing the reception frequency of the receiver to be adjusted based on a frequency command; and a filtering assembly of the bandpass filter type having a passband, referred to as passband of the filtering assembly, having an adjustable passband width able to take a set of values, the filtering assembly allowing the bandwidth of a first signal representative of the input signal of the receiver to be limited to the passband of the filtering assembly; adjustment means allowing the width of the passband of the filtering assembly to be adjusted using a filtering passband control; power acquisition means allowing a measurement of the power of the first signal to be delivered at the output of the filtering assembly.
Abstract translation: 设计为安装在卫星上的射频信号的接收机包括：用于频率控制接收机的设备，允许基于频率命令调整接收机的接收频率; 以及带通滤波器类型的滤波器组件，其具有称为滤波组件的通带的通带，其具有能够获取一组值的可调节通带宽度，滤波组件允许代表输入信号的第一信号的带宽 的接收器被限制在过滤组件的通带上; 使用滤波通带控制来调整滤波组件的通带的宽度的调节装置; 功率获取装置允许测量第一信号的功率在过滤组件的输出处被传送。
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