公开(公告)号：US20240146402A1

公开(公告)日：2024-05-02

申请号：US18201821

申请日：2023-05-25

Applicant: Seakr Engineering, Inc.

Inventor： Paul RUTT ,  Erik Buehler ,  Damon Van Buren

IPC: H04B7/185 ,  H04B1/00 ,  H04B1/40 ,  H04B1/44 ,  H04B7/08 ,  H04B7/212

CPC classification number: H04B7/18515 ,  H04B1/0007 ,  H04B1/0014 ,  H04B1/0039 ,  H04B1/0042 ,  H04B1/0046 ,  H04B1/40 ,  H04B1/44 ,  H04B7/08 ,  H04B7/1851 ,  H04B7/212

Abstract: An integrated analog to digital converting and digital to analog converting (ADDA) RF transceiver for satellite applications, configured to replace conventional analog RF down and up conversion circuitry. The ADDA RF transceiver includes one of more ADCs, DSPs, and DACs, all on a single ASIC. Further, the circuitry is to be radiation tolerant for high availability and reliability in the ionizing radiation environment present in the space environment.

公开(公告)号：US09571036B2

公开(公告)日：2017-02-14

申请号：US13496234

申请日：2012-02-07

Applicant: Karl-Gösta Sahlman ,  Tomas Lieback

Inventor： Karl-Gösta Sahlman ,  Tomas Lieback

IPC: H04B1/10 ,  H03D7/18 ,  H04B1/06 ,  H04B1/00

CPC classification number: H03D7/18 ,  H04B1/0021 ,  H04B1/0046 ,  H04B1/06

Abstract: A heterodyne receiver structure comprises a frequency conversion block arranged to convert an incoming analog radio frequency (RF) signal to an analog intermediate frequency (IF) signal; a filter block arranged to filter said analog IF signal; and an analog-to-digital (AD) converter block arranged to convert said filtered analog IF signal to a digital signal, wherein the AD converter block (309) is arranged to convert the filtered analog IF signal to the digital signal by using a sampling frequency (fs) which is at least N times a maximum bandwidth of the filtered analog IF signal, wherein the frequency spectrum from zero to the sampling frequency is divided into N frequency zones of equal width, wherein N is an even positive number higher than two; the frequency conversion block (304) is arranged to convert the incoming analog RF signal to the analog IF signal such that the analog IF signal is located in any of the N/2-1 frequency zones having lowest frequency; and the filter block (306-308) is arranged to low pass the analog IF signal such that any disturbing signal located in a zone, which would have a mirror image after the AD conversion in the zone, in which the analog IF signal is located, is filtered away, wherein the heterodyne receiver structure further comprises a digital signal processing block (311) arranged to filter said digital signal.

Abstract translation: 外差接收机结构包括频率转换块，其被布置为将输入的模拟射频（RF）信号转换为模拟中频（IF）信号; 滤波器块，布置成滤波所述模拟IF信号; 以及被配置为将所述滤波的模拟IF信号转换为数字信号的模数（AD）转换器模块，其中AD转换器模块（309）被布置成通过使用采样将滤波后的模拟IF信号转换为数字信号 频率（fs）至少为经滤波的模拟IF信号的最大带宽的N倍，其中从零到采样频率的频谱被分成相等宽度的N个频域，其中N是高于2的偶数正数 ; 变频块（304）被配置为将输入的模拟RF信号转换为模拟IF信号，使得模拟IF信号位于具有最低频率的N / 2-1频带中的任一个中; 并且滤波器块（306-308）被布置为使模拟IF信号低通，使得位于区域中的任何干扰信号将在模拟IF信号所在的区域中的AD转换之后具有镜像 被滤除，其中外差接收器结构还包括布置成滤波所述数字信号的数字信号处理块（311）。

公开(公告)号：US20130279556A1

公开(公告)日：2013-10-24

申请号：US13454005

申请日：2012-04-23

Applicant: Olivier SELLER

Inventor： Olivier SELLER

IPC: H04L27/08 ,  H04B17/00

CPC classification number: H03G3/3078 ,  H03G3/3068 ,  H04B1/0046

Abstract: A receiver comprising: one or more variable gain elements; an automatic gain control (AGC) for controlling a gain of one or more of the one or more the variable gain elements; and a frame detector configured to detect the presence of a frame in a signal received by the receiver and to output a signal to the AGC on detection of a data frame, wherein the AGC is configured to estimate a signal to noise ratio (SNR) of the received signal on receiving an input signal from the frame detector, to calculate a SNR margin between the estimated SNR and a target SNR and to adjust the gain of one or more of the one or more variable gain elements to maintain a positive SNR margin such that in the event of interference with the received signal the one or more variable gain elements do not saturate.

Abstract translation: 一种接收机，包括：一个或多个可变增益元件; 用于控制一个或多个可变增益元件中的一个或多个的增益的自动增益控制（AGC）; 以及帧检测器，被配置为检测由接收器接收的信号中的帧的存在，并且在检测到数据帧时将信号输出到AGC，其中，所述AGC被配置为估计所述帧的信噪比（SNR） 所述接收信号在接收到来自所述帧检测器的输入信号时，计算估计的SNR与目标SNR之间的SNR裕度，并且调整所述一个或多个可变增益元件中的一个或多个可变增益元件的增益以维持正的SNR裕度， 在干扰接收信号的情况下，一个或多个可变增益元件不饱和。

公开(公告)号：US20090221249A1

公开(公告)日：2009-09-03

申请号：US12363158

申请日：2009-01-30

Applicant: Volker Aue ,  Sebastien Amiot

Inventor： Volker Aue ,  Sebastien Amiot

IPC: H04B1/18

CPC classification number: H04B1/30 ,  H04B1/0028 ,  H04B1/0046 ,  H04B1/1036 ,  H04L25/03821 ,  H04L27/2657

Abstract: A method and circuit for signal processing in a receiver that can be tuned to different carriers, the method determining the energy of the adjacent carriers N+1 and N−1, wherein a carrier N contains a signal of interest and the receiver is tuned to it, from the digital signal, in that the energy value of the carriers N+1 and N−1 determined are compared with a threshold value, and in the case where the threshold value is exceeded, a frequency shift of the signal by +Δf or −Δf is effected in the second method step prior to the filtering, and the frequency shift thus produced is reversed by a frequency shift by −Δf or +Δf prior to the filtering, and the signal is decoded.

Abstract translation: 一种用于在可以调谐到不同载波的接收机中进行信号处理的方法和电路，所述方法确定相邻载波N + 1和N-1的能量，其中载波N包含感兴趣的信号，并且接收机被调谐到 从数字信号来看，确定的载波N + 1和N-1的能量值与阈值进行比较，并且在超过阈值的情况下，信号的频移+ Deltaf 或-Deltaf在滤波之前的第二方法步骤中实现，并且由此产生的频移在滤波之前通过-Deltaf或+ Deltaf的频移反转，并且该信号被解码。

公开(公告)号：US20180248575A1

公开(公告)日：2018-08-30

申请号：US15721608

申请日：2017-09-29

Applicant: University of Massachusetts

Inventor： Joseph Bardin ,  Mohammad Ghadiri-Sadrabadi

IPC: H04B1/10 ,  H04B1/16

CPC classification number: H04B1/1027 ,  H04B1/0046 ,  H04B1/16

Abstract: A wideband receiver circuit is disclosed that includes a signal input configured to receive a spectrum signal of bandwidth B that contains an RF signal and an interference signal. A down conversion module is connected to the signal input and has N down conversion channels, wherein each of the N down conversion channels is configured to down convert the spectrum signal to one of N decimated baseband signals by processing the spectrum signal with one distinct phase of a sequence of length N and period N/fclk=N/2B to generate a baseband output signal. An amplifier circuit is connected to each of the N down conversion channels, and is configured to amplify the baseband output signal. A digital signal processing module including an analog to digital conversion circuit is connected to each amplifier circuit and is configured to convert the amplified baseband output signal to N digital signals. The digital signal processing module also having a digital reconstruction processor to combine each of the N digital signals and generate a reconstructed RF signal.

公开(公告)号：US20180048500A1

公开(公告)日：2018-02-15

申请号：US15792768

申请日：2017-10-25

Applicant: Asahi Kasei Microdevices Corporation

Inventor： Narutomo TANAKA

IPC: H04L27/14 ,  H04B1/00 ,  H04B1/10 ,  H04B1/12

CPC classification number: H04L27/14 ,  H04B1/0021 ,  H04B1/0032 ,  H04B1/0046 ,  H04B1/10 ,  H04B1/1027 ,  H04B1/12 ,  H04L27/06 ,  H04L27/22

Abstract: A demodulator 100 includes: an AD conversion section 10 that converts a received signal RF in an analogue form to a digital signal; a noise removal section 40 that is connected to a back side of the AD conversion section 10 to detect and remove a noise from an input signal; decimation filters 52 and 54 that are connected to a back side of the noise removal section 40 and reduce a data rate of an input signal; and a demodulation section 60 that is connected to back sides of the decimation filters 52 and 54 and demodulates an input signal. The decimation filters 52 and 54 are connected to the back side of the noise removal section 40, which provides a demodulator less subject to degradation of a signal wave.

公开(公告)号：US20160100455A1

公开(公告)日：2016-04-07

申请号：US14965693

申请日：2015-12-10

Applicant: Analog Devices, Inc.

Inventor： Antonio MONTALVO ,  Kevin G. GARD

IPC: H04W88/10 ,  H04B1/10 ,  H04B1/12

CPC classification number: H04W88/10 ,  H04B1/0021 ,  H04B1/0046 ,  H04B1/1036 ,  H04B1/123 ,  H04B15/04

Abstract: Embodiments of the present invention may provide a receiver. The receiver may include an RF section, a local oscillation signal generator to generate quadrature local oscillation signals, and a quadrature mixture, coupled to the RF section, to downconvert a first group of wireless signals directly to baseband frequency quadrature signals and to downconvert a second group of wireless signals to intermediate frequency quadrature signals. The receiver may also include a pair of analog-to-digital converters (ADCs) to convert the downconverted quadrature signals to corresponding digital quadrature signals. Further, the receiver may include a digital section having two paths to perform signal processing on the digital baseband frequency quadrature signals and to downconvert the digital intermediate frequency signals to baseband cancelling a third order harmonic distortion therein. Moreover, the receiver may include a phase corrector to adjust a phase of one of the local oscillation signals to balance the third order harmonic distortion and a gain offset generator to adjust a gain of one of the downconverted signals to balance the third order harmonic distortion.

Abstract translation: 本发明的实施例可以提供一种接收机。 接收机可以包括RF部分，本地振荡信号发生器以产生正交本地振荡信号，以及耦合到RF部分的正交混合，以将第一组无线信号直接下变频到基带频率正交信号，并将第二组 无线信号组到中频正交信号。 接收机还可以包括一对模数转换器（ADC），以将下变频的正交信号转换成相应的数字正交信号。 此外，接收机可以包括具有两个路径的数字部分，以对数字基带频率正交信号执行信号处理，并且将数字中频信号下变频到基带以消除其中的三阶谐波失真。 此外，接收机可以包括相位校正器，以调整本地振荡信号之一的相位以平衡三阶谐波失真和增益偏移发生器，以调整下变频信号之一的增益以平衡三阶谐波失真。

公开(公告)号：US20160050010A1

公开(公告)日：2016-02-18

申请号：US14828126

申请日：2015-08-17

Applicant: SEAKR ENGINEERING, INC.

Inventor： ERIK BUEHLER ,  DAMON VAN BUREN ,  PAUL RUTT

IPC: H04B7/185 ,  H04B1/40

CPC classification number: H04B7/18515 ,  H04B1/0039 ,  H04B1/0042 ,  H04B1/0046 ,  H04B1/44 ,  H04B7/08 ,  H04B7/1851 ,  H04B7/212

Abstract: An integrated analog to digital converting and digital to analog converting (ADDA) RF transceiver for satellite applications, configured to replace conventional analog RF down and up conversion circuitry. The ADDA RF transceiver includes one of more ADCs, DSPs, and DACs, all on a single ASIC. Further, the circuitry is to be radiation tolerant for high availability and reliability in the ionizing radiation environment present in the space environment.

Abstract translation: 用于卫星应用的集成模数转换和数模转换（ADDA）RF收发器，配置为取代常规模拟RF下降转换电路。 ADDA RF收发器包括一个更多的ADC，DSP和DAC，都在单个ASIC上。 此外，该电路对于在空间环境中存在的电离辐射环境中的高可用性和可靠性是耐辐射的。

公开(公告)号：US09215120B2

公开(公告)日：2015-12-15

申请号：US13333736

申请日：2011-12-21

Applicant: Leonard Rexberg ,  Håkan Malmqvist

Inventor： Leonard Rexberg ,  Håkan Malmqvist

IPC: H04L27/26 ,  H04B1/00 ,  H04B1/04

CPC classification number: H04L27/2624 ,  H04B1/0046 ,  H04B1/005 ,  H04B1/0475 ,  H04L5/001

Abstract: Clipping a widely-separated, multi-carrier signal is effectively performed without having to use a high sampling speed. Clipping is performed in a first stage at a combined signal level, but with a predetermined carrier separation of at least twice the channel bandwidth (2CBW), followed by repositioning the carriers at baseband zero frequency. After clipping, carriers are placed at their respective center frequencies with full carrier separation reintroduced in a second stage. Iterative clipping stages smooth out signal reshaping and re-settled amplitudes for combined carriers.

Abstract translation: 在不需要使用高采样速度的情况下，有效地执行广泛分离的多载波信号的剪切。 在组合信号电平的第一级中执行剪切，但是具有至少两倍于信道带宽（2CBW）的预定载波间隔，随后在基带零频率处重新定位载波。 在剪辑之后，将载波放置在它们各自的中心频率处，并在第二阶段重新引入全载波分离。 迭代剪辑阶段平滑了组合载波的信号整形和重建振幅。

公开(公告)号：US09059766B2

公开(公告)日：2015-06-16

申请号：US13184180

申请日：2011-07-15

Applicant: Mahibur Rahman ,  Omid Oliaei ,  Jorge Ivonnet

Inventor： Mahibur Rahman ,  Omid Oliaei ,  Jorge Ivonnet

IPC: H04B1/10 ,  H04B1/04 ,  H04B1/00

CPC classification number: H04B1/10 ,  H04B1/0046

Abstract: A method may include: determining a signal strength of a signal in a receive path of a wireless communication element, the receive path configured to receive a wireless communication signal and convert the wireless communication signal into a digital signal based at least on an oscillator signal; selecting a current mode from at least one of a first current mode and a second current mode for the wireless communication element based at least on the signal strength; communicating a control signal to the receive path indicative of the current mode; modifying one or more operational parameters of the receive path such that the receive path consumes a different amount of current in each of the current modes.

Abstract translation: 方法可以包括：确定无线通信元件的接收路径中的信号的信号强度，所述接收路径被配置为接收无线通信信号，并且至少基于振荡器信号将无线通信信号转换为数字信号; 至少基于信号强度从无线通信元件的第一当前模式和第二当前模式中的至少一个中选择当前模式; 将控制信号传送到指示当前模式的接收路径; 修改接收路径的一个或多个操作参数，使得接收路径在每个当前模式中消耗不同的电流量。