公开(公告)号：US20240291700A1

公开(公告)日：2024-08-29

申请号：US18568492

申请日：2022-06-09

申请人： Nordic Semiconductor ASA

发明人： Ola BRUSET

IPC分类号： H04L27/12 ,  H04L27/16 ,  H04W52/02

CPC分类号： H04L27/12 ,  H04L27/16 ,  H04W52/0235

摘要： According to an aspect, there is provided a method for transmitting a low-power radio signal, comprising: transmitting, by a radio device, a data radio signal by using binary frequency-shift-keying modulation introducing a phase change between consecutive bit intervals in the data radio signal; and transmitting, by the radio device, a wake-up radio signal using the binary frequency-shift-keying modulation where repetition coding is applied before the frequency-shift-keying to eliminate the phase change between consecutive bit intervals in the wake-up radio signal.

公开(公告)号：US11757686B2

公开(公告)日：2023-09-12

申请号：US17816177

申请日：2022-07-29

申请人： STMICROELECTRONICS SA

发明人： Eric Andre ,  Lionel Vogt

IPC分类号： H04B7/06 ,  H04L27/10 ,  H04L27/12 ,  H04L27/16

CPC分类号： H04L27/106 ,  H04L27/12 ,  H04L27/16

摘要： In an embodiment a device includes a first circuit and a second circuit, wherein the first circuit is configured to generate a fourth signal and a fifth signal by applying the phase shift respectively to a first signal and to a second signal and deliver a sixth signal corresponding to a sampling over one bit of the fourth signal, a seventh signal corresponding to a sampling over one bit of the fifth signal, an eighth signal corresponding to a sampling over one bit of a difference between the fourth and fifth signals, and a ninth signal corresponding to a sampling over one bit of a sum between the fourth and fifth signals, wherein the second circuit is configured to receive the sixth, seventh, eighth, and ninth signals and determine, during a first phase where the first and second signals are representative of a first known symbol of a QPSK constellation, a state of a first bit from among a first state and a second state based on the eighth and ninth signals.

公开(公告)号：US09866418B2

公开(公告)日：2018-01-09

申请号：US15411806

申请日：2017-01-20

申请人： MICROSOFT TECHNOLOGY LICENSING, LLC

发明人： Amer A. Hassan ,  Christian Huitema

IPC分类号： H04L27/26 ,  H04L5/00 ,  H04W16/10 ,  H04L27/00 ,  H04J1/16 ,  H04J11/00 ,  H04L27/16 ,  H04J1/12 ,  H04L5/02

CPC分类号： H04L27/2613 ,  H04J1/12 ,  H04J1/16 ,  H04J11/003 ,  H04J11/0066 ,  H04L5/0007 ,  H04L5/0016 ,  H04L5/0032 ,  H04L5/0037 ,  H04L5/0039 ,  H04L5/0058 ,  H04L5/0064 ,  H04L5/0073 ,  H04L5/023 ,  H04L27/0006 ,  H04L27/16 ,  H04L27/2627 ,  H04W16/10

摘要： A computing device operating according to a frequency division multiplexed protocol in which communication occurs over a signal formed from a plurality of sub-channels selected from anywhere in a frequency spectrum. A computing device may select sub-channels cognitively by using information about sub-channels previously deemed suitable or unsuitable by that computing device or other computing devices. A described technique for determining sub-channel suitability includes analyzing radio frequency energy in the sub-channel to detect signals generated by another computing device or high noise levels. Information may also be used to cognitively select sub-channels to be analyzed, such as by first selecting for analysis previously-used sub-channels.

公开(公告)号：US20170373893A1

公开(公告)日：2017-12-28

申请号：US15616583

申请日：2017-06-07

申请人： NXP USA, Inc.

发明人： Claudio REY

IPC分类号： H04L27/156 ,  H04L27/16

CPC分类号： H04L27/156 ,  H04L25/03012 ,  H04L27/16

摘要： A method of operating frequency shift keying (FSK) demodulator for demodulating symbols includes providing current and previous buffered portions of an input signal to correlation circuits of the FSK demodulator, where each buffered portion persists for a symbol duration time period. The correlation circuits output first correlation metrics that indicate a likelihood of whether the buffered portions match a respective target pattern. The first correlation metrics are combined into a set of first correlation results, which are delayed by at least the symbol duration time period. The current and next buffered portions are provided to the correlation circuits, which output second correlation metrics that are combined into a set of second correlation results. The set of second correlation results are combined with the delayed set of first correlation results to produce a demodulation decision that indicates a most likely symbol value encoded in the current buffered portion.

公开(公告)号：US09722845B2

公开(公告)日：2017-08-01

申请号：US14757821

申请日：2015-12-23

申请人： Intel IP Corporation

发明人： Lu Lu ,  Jinyong Lee ,  Xuan Steven Li ,  Aiguo Yan

IPC分类号： H04L27/22 ,  H04L27/26 ,  H04L27/32 ,  H04B17/20 ,  H04W4/00

CPC分类号： H04L27/2649 ,  H04B17/20 ,  H04L27/16 ,  H04L27/233 ,  H04L27/32 ,  H04L27/3845 ,  H04L2027/0026 ,  H04W4/80

摘要： A Bluetooth Low Energy (BLE) device, having a demodulator configured to translate in-phase and quadrature components of a received BLE signal into a differential phase signal; an estimator configured to estimate a frequency offset of the differential phase signal; and a detector configured to detect information in the differential phase signal corrected by the estimated frequency offset.

公开(公告)号：US09407490B2

公开(公告)日：2016-08-02

申请号：US14580296

申请日：2014-12-23

申请人： Intel Corporation

发明人： Greg Chance ,  Thorsten Tracht

IPC分类号： H04L27/26 ,  H04L27/16 ,  H04W24/08

CPC分类号： H04L27/2672 ,  H04B1/28 ,  H04L27/16 ,  H04W24/08

摘要： A method of processing signals may include receiving a first signal being modulated on a first carrier frequency in a predefined frequency band; measuring a signal level of a received second signal at a frequency higher than the first carrier frequency; and measuring a signal level of a received third signal at a frequency being lower than the first carrier frequency. The method may further include selecting an intermediate mixing carrier frequency from a plurality of intermediate mixing carrier frequencies for processing at least a portion of the received first signal based on the signal level of the second signal and the signal level of the third signal. The method may additionally include performing intermediate frequency reception of at least a portion of the received first signal using the selected intermediate mixing carrier frequency.

摘要翻译： 处理信号的方法可以包括：接收在预定频带中在第一载波频率上被调制的第一信号; 以高于第一载波频率的频率测量所接收的第二信号的信号电平; 以及以低于所述第一载波频率的频率测量接收到的第三信号的信号电平。 该方法还可以包括从多个中间混合载波频率中选择中间混合载波频率，用于基于第二信号的信号电平和第三信号的信号电平来处理接收到的第一信号的至少一部分。 该方法可以另外包括使用所选择的中间混合载波频率来对接收到的第一信号的至少一部分进行中频接收。

公开(公告)号：US09407204B2

公开(公告)日：2016-08-02

申请号：US14219716

申请日：2014-03-19

申请人： STMicroelectronics SA ,  STMicroelectronics (Grenoble 2) SAS

发明人： Vincent Heinrich ,  Bruno Paille

IPC分类号： H04K1/10 ,  H04L27/28 ,  H03D3/06 ,  H04L27/144 ,  H04L27/16

CPC分类号： H03D3/06 ,  H04L27/144 ,  H04L27/16

摘要： A method and corresponding device for processing a frequency-modulated analog signal are disclosed. The signal includes a number of symbols belonging to a set of M symbols respectively associated with at least one frequency of a set of M frequencies. The method includes a phase of reading each symbol of the signal that includes a sampling of a signal portion corresponding to the duration of a symbol and delivering N samples (M being less than N). M individual discrete Fourier transform processing operations are performed on the N samples. Each individual processing operation is associated with each of the frequencies. The M individual processing operations deliver M processing results. The value of the symbol can be determined from the M processing results.

摘要翻译： 公开了一种用于处理调频模拟信号的方法和相应装置。 信号包括属于一组M个符号的符号的数目，分别与一组M个频率的至少一个频率相关联。 该方法包括读取信号的每个符号的相位，其包括对应于符号的持续时间的信号部分的采样，并且递送N个采样（M小于N）。 对N个样本执行M个离散傅立叶变换处理操作。 每个单独的处理操作与每个频率相关联。 M个人处理操作提供M个处理结果。 可以从M处理结果确定符号的值。

公开(公告)号：US20150003568A1

公开(公告)日：2015-01-01

申请号：US14490290

申请日：2014-09-18

申请人： LAPIS Semiconductor Co., Ltd

发明人： Koutaro MIZUNO

IPC分类号： H04L27/156 ,  H04L27/00

CPC分类号： H04L27/1563 ,  H03B28/00 ,  H04B1/16 ,  H04L27/0014 ,  H04L27/16 ,  H04L2027/003 ,  H04L2027/0067

摘要： A circuit and a method for removing a frequency offset and a communication apparatus including the circuit, capable of removing the frequency offset by tracking rapidly and accurately in a payload section. A sequence of sample levels is obtained by sampling a frequency level of the baseband signal at every 0.5 symbol interval. Absolute values of differences between the frequency levels adjacent to each other at every 1 symbol are calculated as first difference absolute values. Absolute values of differences between the frequency levels adjacent to each other at every 1 symbol are calculated as second difference absolute values. When the first difference absolute values are greater than a predetermined first determination value or the second difference absolute values are less than a predetermined second determination value, the average value calculated is set as the frequency offset.

摘要翻译： 一种用于去除频率偏移的电路和方法以及包括该电路的通信装置，能够通过在有效载荷部分中快速且准确地跟踪来去除频率偏移。 通过以每0.5个符号间隔对基带信号的频率电平进行采样来获得采样电平的序列。 在每1个符号相邻的频率电平之间的差的绝对值被计算为第一差分绝对值。 在每1个符号相邻的频率电平之间的差的绝对值被计算为第二差绝对值。 当第一差分绝对值大于预定第一确定值或第二差异绝对值小于预定的第二确定值时，将所计算的平均值设置为频率偏移。

公开(公告)号：US08824606B2

公开(公告)日：2014-09-02

申请号：US13465613

申请日：2012-05-07

申请人： Hao-Jen Cheng ,  Qinfang Sun

发明人： Hao-Jen Cheng ,  Qinfang Sun

IPC分类号： H03D1/00

CPC分类号： H04L27/0014 ,  H04L27/16 ,  H04L27/2331 ,  H04L2027/0034 ,  H04L2027/0095

摘要： A receiver unit of a communication device can employ multiple correlators for decoding the access address of a packet received from another communication device. A dynamically determined primary frequency offset is applied to a phase difference signal that is determined from an RF signal that comprises the packet. For each of a plurality of access address decoding chains of the receiver unit, a secondary frequency offset associated with the access address decoding chain is applied to the phase difference signal, the phase difference signal is correlated with a predetermined access address of the communication device, and a resultant correlation output is compared against a correlation threshold. One of the access address decoding chains that generated the correlation output that is greater than the correlation threshold is selected and the packet is demodulated based, at least in part, on the phase difference signal corresponding to the selected access address decoding chain.

摘要翻译： 通信设备的接收机单元可以使用多个相关器来解码从另一通信设备接收的分组的接入地址。 将动态确定的主频偏移施加到从包括分组的RF信号确定的相位差信号。 对于接收机单元的多个接入地址解码链中的每一个，与接入地址解码链相关联的次频偏移被施加到相位差信号，相位差信号与通信设备的预定访问地址相关， 并将合成的相关输出与相关阈值进行比较。 选择生成大于相关阈值的相关输出的访问地址解码链之一，并且至少部分地基于与所选择的访问地址解码链相对应的相位差信号来解调分组。

公开(公告)号：US08588718B2

公开(公告)日：2013-11-19

申请号：US13160657

申请日：2011-06-15

申请人： Neil Briffett

发明人： Neil Briffett

IPC分类号： H04B1/10 ,  H04H40/81 ,  H03G3/34 ,  H03G3/26

CPC分类号： H03G3/344 ,  H03G3/26 ,  H04H40/45 ,  H04L27/14 ,  H04L27/16

摘要： A method comprises detecting whether or not a frequency modulation broadcast receiver is tuned to an overdeviated frequency modulated broadcast, or is at a location where overdeviated frequency modulated broadcasts exist or has received a user input indicating the presence of an overdeviated frequency modulated broadcast; and in response to the detection, automatically adjusting operation of the frequency modulated broadcast receiver. Automatically adjusting operation comprises adjusting one or more parameters or settings in such a way as to alter the susceptibility of a speaker arrangement to the possibility of being overdriven by overdeviated frequency modulated broadcasts.

摘要翻译： 一种方法包括：检测频率调制广播接收机是否被调谐到过度调频广播，或处于存在过度频率调制广播的位置，或者已经接收到指示存在超频调频广播的用户输入; 并且响应于检测，自动调整调频广播接收机的操作。 自动调整操作包括调整一个或多个参数或设置，以便将扬声器装置的敏感度改变为由过度调频的广播过度驱动的可能性。