公开(公告)号：US20240178864A1

公开(公告)日：2024-05-30

申请号：US18198712

申请日：2023-05-17

Applicant: Spectral DSP Corp

Inventor： Fredric J. Harris

IPC: H04B1/00 ,  H04B1/18 ,  H04B1/30 ,  H04L27/34

CPC classification number: H04B1/001 ,  H04B1/18 ,  H04B1/30 ,  H04L27/345 ,  H04B2001/307

Abstract: Analysis channelizers are provided. In one embodiment, the channelizer includes an M-path filter receiving an input signal; a circular buffer in communication with the M-path filter; and an M-point inverse fast Fourier transform (IFFT) circuit in communication with the circular buffer, such that the channelizer aligns spectra of the input signal with spectral responses an odd length, non-maximally decimated filter bank by alternating sign heterodyne of the input signal. The channelizer applies an equivalency theorem to the non-maximally decimated filter bank formed by an odd length polyphaser filter. Advantageously, the M-path filter does not require on-line signal processing to obtain odd-indexed filter centers. In another embodiment, the channelizer alternates a sign heterodyne of a filter coefficient weight.

公开(公告)号：US20180248593A1

公开(公告)日：2018-08-30

申请号：US15755059

申请日：2016-07-21

Applicant: DATANG MOBILE COMMUNICATIONS EQUIPMENT CO. LTD.

Inventor： Huarong SUN ,  Tao DUAN ,  Suling ZOU ,  Jinxi SU ,  Huijuan NI

IPC: H04B7/0452 ,  H04B1/00

CPC classification number: H04B7/0452 ,  H04B1/0007 ,  H04B1/001 ,  H04B1/0021 ,  H04B7/04

Abstract: Disclosed in the present invention are a data transmission method, an apparatus and an antenna array, in order to realize wide bandwidth data transmission of massive antenna array. The data transmission method comprises: baseband IQ data of multiple CA is grouped via IR data interface module to obtain baseband IQ data of each CA group; for baseband IQ data of each CA group: the baseband IQ data with enhanced data rate of the CA group is up-converted to digital intermediate frequency band by a digital up-conversion module; the digital intermediate frequency signals of the CA group are superposed by a combiner to form a multi-carrier digital intermediate frequency signal; in accordance with the amplitude and phase requirements of each antenna in a group of antenna sharing the multi-carrier digital intermediate frequency signal, the amplitude and phase of the multi-carrier digital intermediate frequency signal are respectively adjusted and transmitted to a digital to analog converter of a corresponding antenna channel; a multi-carrier analog intermediate frequency signal is generated by the digital to analog converter of each antenna channel, and then is transmitted to the corresponding antenna channel.

公开(公告)号：US20180191397A1

公开(公告)日：2018-07-05

申请号：US15579181

申请日：2015-09-25

Applicant: Andrew Wireless Systems GmbH

Inventor： Charles B. Morrison

IPC: H04B1/48 ,  H04B1/52 ,  H04L5/14

CPC classification number: H04B1/48 ,  H04B1/001 ,  H04B1/52 ,  H04L5/14

Abstract: A telecommunications system can include analog-to-digital converters in an uplink communication path or a downlink communication path. The analog-to-digital converters can have a high dynamic range and bandwidth to obviate a need for down-conversion of signals using an analog mixer. The uplink communication path and the downlink communication path can be coupled to an antenna using a non-duplexer coupling device. Uplink signals traversing the uplink communication path can be isolated from downlink signals independent of using a duplexer.

公开(公告)号：US09742452B2

公开(公告)日：2017-08-22

申请号：US14938027

申请日：2015-11-11

Applicant: JVC KENWOOD Corporation

Inventor： Motohiro Ohkura

IPC: H04L27/08 ,  H04N5/50 ,  H04B1/16 ,  H04B1/00 ,  H04B1/12 ,  H04B1/28 ,  H04B15/04

CPC classification number: H04B1/16 ,  H04B1/001 ,  H04B1/123 ,  H04B1/28 ,  H04B15/04

Abstract: A local oscillator outputs a local oscillator signal that provides an upper side heterodyne mode or a lower side heterodyne mode for a received RF signal. A first converter converts the received RF signal into an IF signal, based on the local oscillator signal output from the local oscillator. An FM detector subjects the IF signal produced by conversion to detection. A first measurement unit measures a signal intensity of the IF signal before the IF signal is input to the FM detector. A second measurement unit measures a squelch voltage of a signal detected by the FM detector. A controller that controls the local oscillator based on the signal intensity measured by the first measurement unit and the squelch voltage measured by the second measurement unit.

公开(公告)号：US09591595B2

公开(公告)日：2017-03-07

申请号：US14501622

申请日：2014-09-30

Applicant: Hughes Network Systems, LLC

Inventor： J. Mark Steber ,  Yogesh Sethi ,  Walter Robert Kepley, III ,  Dan Hantz ,  Nimesh Ambeskar ,  Hanhui Zhang

IPC: H04B15/00 ,  H04B7/185 ,  H04W52/52 ,  H04B1/00

CPC classification number: H04W52/52 ,  H04B1/001 ,  H04B7/185 ,  H04B7/18517 ,  H04B15/00

Abstract: A method and a satellite gateway for minimizing an impact of a noise floor variation in a spot beam satellite system. A demodulator processes digitized signals from multiple channels. Digitized signals are automatically gain controlled by respective automatic gain control components associated with respective channels. Automatic gain controlled digitized signals are downconverted and provided to a burst processor. The burst processor processes each downconverted signal and provides, with respect to each downconverted signal, an automatic gain control estimate, a code rate, and an inroute number to a processor component. The processor component determines an average automatic gain control value for each inroute, provides automatic gain control references to the respective automatic gain control components, and periodically sends noise map information to satellite terminals served by the satellite gateway. In some embodiments, the automatic gain control values are biased according to corresponding code rates.

Abstract translation: 一种用于最小化点波束卫星系统中的噪声基底变化的影响的方法和卫星网关。 解调器处理来自多个通道的数字化信号。 数字化信号由与相应通道相关联的相应自动增益控制部件自动增益控制。 自动增益控制数字化信号被下变频并提供给突发处理器。 突发处理器处理每个下变频信号，并且相对于每个下变频信号，向处理器组件提供自动增益控制估计，码率和路由号。 处理器组件确定每个路由器的平均自动增益控制值，为相应的自动增益控制组件提供自动增益控制参考，并且周期性地向卫星网关所服务的卫星终端发送噪声图信息。 在一些实施例中，根据相应的代码率来自动增益控制值被偏置。

公开(公告)号：US20170026972A1

公开(公告)日：2017-01-26

申请号：US15283948

申请日：2016-10-03

Applicant: CommScope Technologies LLC

Inventor： Thomas Kummetz ,  Fred William Phillips ,  Christopher Goodman Ranson ,  Van E. Hanson

IPC: H04W72/04 ,  H04W72/12 ,  H04B1/00

CPC classification number: H04W72/0453 ,  H04B1/001 ,  H04L1/00 ,  H04L25/05 ,  H04L27/0002 ,  H04W72/02 ,  H04W72/0413 ,  H04W72/042 ,  H04W72/1263 ,  H04W88/085

Abstract: A telecommunications system is provided that includes a unit for communicating channelized digital baseband signals with remotely located units. The channelized digital baseband signals include call information for wireless communication. The unit includes a channelizer section and a transport section. The channelizer section can extract, per channel, the channelized digital baseband signals using channel filters and digital down-converters. The transport section can format the channelized digital baseband signals for transport together using a transport schedule unit for packetizing and packet scheduling the channelized digital baseband signals. A signal processing subsystem can control a gain of uplink digital baseband signals, independently, that are received from the remotely located units prior to summing the uplink digital baseband signals.

Abstract translation: 提供一种电信系统，其包括用于将具有远程定位单元的信道化数字基带信号进行通信的单元。 信道化数字基带信号包括用于无线通信的呼叫信息。 该单元包括通道化器部分和运输部分。 通道化器部分可以使用通道滤波器和数字下变频器，每通道提取通道化数字基带信号。 传输部分可以使用传输调度单元格式化信道化数字基带信号以一起传输，用于对信道化数字基带信号进行分组和分组调度。 信号处理子系统可以在对上行数字基带信号求和之前独立地控制从远程位置单元接收的上行链路数字基带信号的增益。

公开(公告)号：US09490750B2

公开(公告)日：2016-11-08

申请号：US14199805

申请日：2014-03-06

Applicant: Per Vices Corporation

Inventor： Victor Wollesen ,  Yi Yao

IPC: H04B1/00 ,  H04W4/00 ,  H03D9/00 ,  H04L5/06 ,  H03J1/00 ,  H04B1/16 ,  H04L27/00

CPC classification number: H03D9/00 ,  H03J1/0008 ,  H04B1/001 ,  H04B1/16 ,  H04L5/06 ,  H04L27/0008

Abstract: A system and method are provided for extracting and demodulating one or more channels in a radio signal. The method includes receiving a first radio signal using a radio frequency front end, translating a first band of frequencies of the first radio signal to a second band of frequencies to generate a second radio signal, digitizing the second radio signal to generate a digital signal, extracting one or more additional band of frequencies of the digital signal, each additional band of frequencies corresponding to a channel, and demodulating one or more channels to generate a respective demodulated signal. In another aspect, a system and method are provided for modulating and combining one or more channels into a radio signal.

Abstract translation: 提供了一种用于提取和解调无线电信号中的一个或多个信道的系统和方法。 该方法包括使用射频前端接收第一无线电信号，将第一无线电信号的第一频带转换为第二频带以产生第二无线电信号，数字化第二无线电信号以产生数字信号， 提取数字信号的一个或多个附加频带，每个附加频带对应于一个频道，以及解调一个或多个频道以产生相应的解调信号。 在另一方面，提供了一种用于将一个或多个信道调制并组合成无线电信号的系统和方法。

公开(公告)号：US20160212005A9

公开(公告)日：2016-07-21

申请号：US14631129

申请日：2015-02-25

Applicant: Astrapi Corporation

Inventor： Nigel JONES ,  Jerrold PROTHERO

IPC: H04L27/34 ,  H04B1/04 ,  H04B1/40

CPC classification number: H04L27/34 ,  H03F1/02 ,  H03F3/24 ,  H04B1/0007 ,  H04B1/001 ,  H04B1/0475 ,  H04B1/40 ,  H04B2001/045 ,  H04L27/0008

Abstract: A software defined radio is disclosed. The software defined radio may utilize a method for encoding a bit stream into non-periodic spiral-based symbol waveforms for transmission and reception. The method includes transmitting a signal constructed from one or more non-periodic modulation sets residing on a memory system of the software defined radio, where each modulation set corresponds to a symbol alphabet and provides non-periodic symbol waveforms corresponding to symbol bit sequences segmented by a microprocessor according to alphabet size. The method also includes receiving the signal constructed from one or more spiral modulation sets, wherein the signal from one or more spiral modulation sets are filtered and then fed to an analog to digital converter, where the signal constructed from the one or more spiral modulation sets is digitized and are fed to the microprocessor. A non-transitory computer storage media may also execute the method.

公开(公告)号：US20150365117A1

公开(公告)日：2015-12-17

申请号：US14301764

申请日：2014-06-11

Applicant: Silicon Laboratories Inc.

Inventor： Michael R. May ,  Junsong Li

IPC: H04B1/16 ,  H04L7/00

CPC classification number: H04B1/16 ,  H04B1/001 ,  H04L7/0079

Abstract: Radio frequency (RF) receivers having whitened digital frame processing and related methods are disclosed. Disclosed embodiments whiten frequency domain interference generated periodic current pulses from by digital frame processing by applying a variable time delay to the frame control signals that initiate digital frame processing. For one embodiment, the variable time delay is achieved by waiting a variable number of digital clock cycles for each digital frame processing cycle. Still further, a variable number of no operation (NO-OP) cycles can be performed at the beginning of each frame processing cycle to provide the variable time delay for the variable number of digital clock cycles. Other variable time delay techniques could also be utilized while still taking advantage of the whitened digital frame processing embodiments described herein.

Abstract translation: 公开了具有白化数字帧处理和相关方法的射频（RF）接收机。 公开的实施方案白化频域干扰通过对发起数字帧处理的帧控制信号应用可变时间延迟从数字帧处理产生周期性电流脉冲。 对于一个实施例，通过为每个数字帧处理周期等待可变数目的数字时钟周期来实现可变时间延迟。 此外，可以在每个帧处理周期的开始执行可变数目的无操作（NO-OP）周期，以为可变数量的数字时钟周期提供可变时间延迟。 还可以利用其他可变时间延迟技术，同时仍然利用本文描述的增白数字帧处理实施例。

公开(公告)号：US09209957B2

公开(公告)日：2015-12-08

申请号：US14334443

申请日：2014-07-17

Applicant: Entropic Communications, Inc.

Inventor： Tommy Yu

IPC: H04L27/06 ,  H04L5/06

CPC classification number: H04L5/06 ,  H04B1/001 ,  H04B1/16 ,  H04B7/18513 ,  H04L27/2634

Abstract: Systems and methods in accordance with embodiments of the invention include converting satellite signals to an intermediate frequency signal for content decoding, and selecting modulated digital data within the satellite signals for content decoding using digital signal processing. One embodiment includes a system configured to select at least one content channel from an input signal including a plurality of content channels modulated onto a carrier, the system including: a digital channelizer switch including: a high speed analog to digital converter configured to digitize the intermediate frequency signal; a digital channelizer configured to digitally tune a content channel from the digitized intermediate frequency signal; and a high speed digital to analog converter configured to generate an analog output signal using the content channel digitally tuned from the digitized intermediate frequency signal by the digital channelizer.

Abstract translation: 根据本发明的实施例的系统和方法包括将卫星信号转换为用于内容解码的中频信号，以及使用数字信号处理在卫星信号内选择调制数字数据进行内容解码。 一个实施例包括被配置为从包括调制到载波上的多个内容信道的输入信号中选择至少一个内容信道的系统，该系统包括：数字信道切换器，包括：高速模数转换器，被配置为数字化中间 频率信号; 配置为从数字化的中频信号数字地调谐内容信道的数字信道器; 以及高速数模转换器，被配置为使用由数字通道器从数字化的中频信号数字调谐的内容通道产生模拟输出信号。