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公开(公告)号：US11929766B2
公开(公告)日：2024-03-12
申请号：US17659468
申请日：2022-04-15
CPC分类号： H04B1/0007 , H04B1/0053 , H04B1/403 , H04B1/588
摘要： According to embodiments, an example method for determining an analog-to-digital converter (ADC) output timing in a user equipment may include operating a switch in a first mode to route a system clock from an oscillator to an input of the ADC and determining a first ADC output timing based on a first set of ADC samples generated by the ADC. The method may also include operating the switch in a second mode to route analog signals from a transceiver of the user equipment to the input of the ADC and obtaining a second set of ADC samples generated by the ADC based on the analog signals.
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公开(公告)号：US11695446B2
公开(公告)日：2023-07-04
申请号：US17673271
申请日：2022-02-16
发明人： Naohiro Matsushita
CPC分类号： H04B1/588 , H04B1/0057 , H04B1/1018 , H04B2001/1045
摘要： According to an embodiment, a communication apparatus creates a prediction model taking into consideration of the actual fluctuation of a self-interference signal. The communication apparatus selects, where the self-interference signal has largely fluctuated, a prediction model in accordance with a fluctuation pattern at an early stage of the fluctuation. The communication apparatus generates a cancel signal by control applying a gain and an amount of phase shift represented by the prediction model.
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公开(公告)号：US3859469A
公开(公告)日：1975-01-07
申请号：US39272073
申请日：1973-08-29
发明人： GETGEN LAWRENCE E
摘要： A terminal having a plurality of lines in a two-way communication system. A plurality of resonant transfer means is used for effecting hybrid separation of the several lines into individual transmit and receive paths. The several hybrids use resonant transfer gates and bandpass filters selecting different portions of the frequency spectrum. As a phenomenon of the system, the line signal, e.g., voice current, is repeated as sidebands located at multiples of the sampling frequency of the resonant transfer gates. Frequency division multiplexing of the hybrid paths is accordingly attained.
摘要翻译： 一种在双向通信系统中具有多条线路的终端。 多个谐振传递装置用于实现将多条线路混合分离为各个发射和接收路径。 多个混合器使用谐振传输门和带通滤波器来选择频谱的不同部分。 作为系统的现象，线路信号（例如语音电流）被重复为位于谐振传输门的采样频率的倍数的边带。 因此实现混合路径的频分复用。
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公开(公告)号：US3833772A
公开(公告)日：1974-09-03
申请号：US34957273
申请日：1973-04-09
发明人： GETGEN L
摘要： A time division hybrid circuit for communications systems which functions by means of a plurality of resonant transfer energy storage devices connected to the line, transmitting and receiving terminals of the system and a plurality of gates for periodically connecting the devices in a manner achieving the desired hybrid function. More specifically, the line connected device is periodically connected to the transmitting terminal connected device at a sampling frequency of at least two times the highest message frequency of interest (Nyquist theorem) to establish periodic conducting periods effecting resonant transfer of energy from the line device to the transmitting device; and the receiving terminal connected device is connected to the line connected device at the same sampling frequency for establishing second conducting periods effecting resonant transfer of energy with each of the second conducting periods closely following each first named conducting period and within the sampling interval.
摘要翻译： 一种用于通信系统的时分混合电路，其通过连接到所述线路的多个谐振传输能量存储装置而工作，所述系统的发射和接收终端以及用于以实现期望的混合的方式周期性地连接所述装置的多个门 功能。 更具体地，线路连接设备以至少两倍于感兴趣的最高消息频率（奈奎斯特定理）的采样频率周期性地连接到发射终端连接的设备，以建立周期性的传导周期，从而实现从线路设备到能量的共振转移 发送装置; 并且接收终端连接的设备以相同的采样频率连接到线路连接的设备，用于建立第二导电时段，以在紧随每个第一命名的导通时段之后并且在采样间隔内的每个第二导电周期进行能量的共振转移。
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公开(公告)号：US3346697A
公开(公告)日：1967-10-10
申请号：US51700265
申请日：1965-12-28
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公开(公告)号：US3073903A
公开(公告)日：1963-01-15
申请号：US66370457
申请日：1957-06-05
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公开(公告)号：US3071655A
公开(公告)日：1963-01-01
申请号：US85165459
申请日：1959-11-09
申请人： NORTHERN ELECTRIC CO
发明人： LANBAM EDWARD H
IPC分类号： H04B1/58
CPC分类号： H04B1/588
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公开(公告)号：US11811379B2
公开(公告)日：2023-11-07
申请号：US17559960
申请日：2021-12-22
申请人： Rambus Inc.
发明人： Masum Hossain , Carl W. Werner
CPC分类号： H03H11/1239 , H04B1/0458 , H04B1/109 , H04B1/588 , H04B2001/045
摘要： Disclosed is receiver for a noise limited system. A front-end circuit amplifies and band-limits an incoming signal. The amplification increases the signal swing but introduces both thermal and flicker noise. A low-pass band limitation reduces the thermal noise component present at frequencies above what is necessary for correctly receiving the transmitted symbols. This band limited signal is provided to the integrator circuit. The output of the integrator is equalized to reduce the effects of inter-symbol interference and then sampled. The samples are used to apply low frequency equalization (i.e., in response to long and/or unbalanced strings of symbols) to mitigate the effects of DC wander caused by mismatches between the number of symbols of each kind being received.
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公开(公告)号：US20230336194A1
公开(公告)日：2023-10-19
申请号：US17659554
申请日：2022-04-18
CPC分类号： H04B1/0078 , H04B1/588 , H04B1/0042
摘要： Techniques are provided for a multi-frequency sampling system. A system implementing the techniques according to an embodiment includes a first bandpass filter to filter a radio frequency (RF) signal to generate a first filtered signal in a first frequency band, and a second bandpass filter to filter the RF signal to generate a second filtered signal in a second frequency band. The system also includes a first analog to digital converter (ADC) operating at a first sampling frequency to convert the first filtered signal to a first digital signal and a second ADC operating at a second sampling frequency to convert the second filtered signal to a second digital signal. The first frequency band is selected to avoid a first Nyquist boundary zone associated with the first sampling frequency and the second frequency band is selected to avoid a second Nyquist boundary zone associated with the second sampling frequency.
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公开(公告)号：US20230336192A1
公开(公告)日：2023-10-19
申请号：US17659468
申请日：2022-04-15
CPC分类号： H04B1/0007 , H04B1/0053 , H04B1/403 , H04B1/588
摘要： According to embodiments, an example method for determining an analog-to-digital converter (ADC) output timing in a user equipment may include operating a switch in a first mode to route a system clock from an oscillator to an input of the ADC and determining a first ADC output timing based on a first set of ADC samples generated by the ADC. The method may also include operating the switch in a second mode to route analog signals from a transceiver of the user equipment to the input of the ADC and obtaining a second set of ADC samples generated by the ADC based on the analog signals.
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