公开(公告)号：US09729248B2

公开(公告)日：2017-08-08

申请号：US15268863

申请日：2016-09-19

Applicant: FUJITSU LIMITED

Inventor： Taki Kono

IPC: H04B1/10 ,  H04B10/60 ,  H04L5/00 ,  H04B7/02 ,  H04H60/00 ,  H04L7/06 ,  H04L27/00

CPC classification number: H04B10/60 ,  H04B7/02 ,  H04H40/09 ,  H04H60/00 ,  H04H2201/12 ,  H04L5/0048 ,  H04L7/06 ,  H04L27/00

Abstract: A non-transitory computer-readable recording medium on which a program is recorded for a causing a processor to execute a demodulation process. The demodulation process includes detecting a preamble of a wireless signal transmitted from a first transmission station by way of a short wavelength carrier wave, extracting a first signal superimposed on the short wavelength carrier wave, the first signal being extracted from a wireless signal that is identified in accordance with the detection of the preamble, extracting a second signal superimposed on a carrier wave transmitted from a second transmission station, and performing demodulation on a target demodulation signal obtained by superimposing the first signal on the second signal.

公开(公告)号：US20170093500A1

公开(公告)日：2017-03-30

申请号：US15268863

申请日：2016-09-19

Applicant: FUJITSU LIMITED

Inventor： Taki Kono

IPC: H04B10/60 ,  H04L5/00

CPC classification number: H04B10/60 ,  H04B7/02 ,  H04H40/09 ,  H04H60/00 ,  H04H2201/12 ,  H04L5/0048 ,  H04L7/06 ,  H04L27/00

Abstract: A non-transitory computer-readable recording medium on which a program is recorded for a causing a processor to execute a demodulation process. The demodulation process includes detecting a preamble of a wireless signal transmitted from a first transmission station by way of a short wavelength carrier wave, extracting a first signal superimposed on the short wavelength carrier wave, the first signal being extracted from a wireless signal that is identified in accordance with the detection of the preamble, extracting a second signal superimposed on a carrier wave transmitted from a second transmission station, and performing demodulation on a target demodulation signal obtained by superimposing the first signal on the second signal.

公开(公告)号：US20120328057A1

公开(公告)日：2012-12-27

申请号：US13165325

申请日：2011-06-21

Applicant: Brian W. Kroeger ,  Paul J. Peyla

Inventor： Brian W. Kroeger ,  Paul J. Peyla

IPC: H04L27/06

CPC classification number: H04B7/0814 ,  H04B7/02 ,  H04B7/0805 ,  H04B17/29 ,  H04B17/309 ,  H04H2201/12 ,  H04H2201/18 ,  H04H2201/19 ,  H04H2201/20 ,  H04L1/20 ,  H04L27/2663 ,  H04L27/2678

Abstract: A method for detecting the digital quality of a radio signal includes: receiving a radio signal including a digital portion modulated by a series of symbols each including a plurality of samples; computing correlation points between endpoint samples in cyclic prefix regions of adjacent symbols; and using the correlation points to produce a digital signal quality metric. Receivers that implement the method are also provided.

Abstract translation: 一种用于检测无线电信号的数字质量的方法包括：接收包括由包括多个采样的一系列符号调制的数字部分的无线电信号; 计算相邻符号的循环前缀区域中的端点样本之间的相关点; 并使用相关点来产生数字信号质量度量。 还提供了实现该方法的接收器。

公开(公告)号：US07515921B2

公开(公告)日：2009-04-07

申请号：US10434800

申请日：2003-05-09

Applicant: Jens Wildhagen ,  Dietmar Schill

Inventor： Jens Wildhagen ,  Dietmar Schill

IPC: H04B15/00

CPC classification number: H04H20/22 ,  H04H2201/12 ,  H04H2201/20 ,  H04L5/06

Abstract: A reduced peak simulcast signal generator and a method for generating a stable peak-attenuated simulcast signal, which combines a digital broadcast signal and an analogue broadcast signal, are described. The simulcast signal generator comprises at least one attenuation stage for attenuating the digital and/or the analogue broadcast signal in order to obtain a stable simulcast signal. Each attenuation stage comprises a simulcast signal generator for generating an error signal, and attenuation means which attenuate, in dependence of said first error signal, at least one of the analogue and the digital broadcast signal.

Abstract translation: 描述了降低峰值联播信号发生器和用于产生组合数字广播信号和模拟广播信号的稳定峰值衰减联播信号的方法。 联播信号发生器包括用于衰减数字和/或模拟广播信号的至少一个衰减级，以便获得稳定的联播信号。 每个衰减级包括用于产生误差信号的同播信号发生器，以及根据所述第一误差信号衰减模拟和数字广播信号中的至少一个的衰减装置。

公开(公告)号：US20080279090A1

公开(公告)日：2008-11-13

申请号：US12079927

申请日：2008-03-28

Applicant: Yan Liu ,  Huazhong Yang

Inventor： Yan Liu ,  Huazhong Yang

IPC: H04J11/00

CPC classification number: H04L27/265 ,  H04H2201/12 ,  H04L27/0008

Abstract: A Digital Radio Mondiale (DRM) receiver and demodulation method includes an analog and digital separation filter for filtering and separating a DRM-encoded signal and a non DRM-encoded signal from a composite RF signal received at the receiver. The DRM receiver includes a programmable downsampler and a programmable N-point Fast Fourier Transform (FFT) to recover and demodulate the OFDM symbols in a received DRM-encoded RF signal. The received signal is digitally sampled at a rate operably integer downsampled to achieve a number N samples in the useful portion of the OFDM symbol for input to an N-point FFT, where N equal to a power of two. The downsampling rate and size (N-points) of the FFT depend on the DRM encoding and transmission parameters, notably the robustness mode and spectrum occupancy. The structure and operation of the receiver in this manner simplifies the design and reduces the required filter order of the analog and digital separation filter.

Abstract translation: 数字无线电广播（DRM）接收机和解调方法包括模拟和数字分离滤波器，用于从在接收机处接收的复合RF信号过滤和分离DRM编码信号和非DRM编码信号。 DRM接收机包括可编程下行采样器和可编程N点快速傅里叶变换（FFT），以在接收的DRM编码RF信号中恢复和解调OFDM符号。 所接收的信号以可操作地整数下采样的速率进行数字采样，以在OFDM符号的有用部分中实现N个采样，以输入到N点FFT，其中N等于2的幂。 FFT的下采样率和大小（N点）取决于DRM编码和传输参数，特别是鲁棒性模式和频谱占用。 以这种方式，接收机的结构和操作简化了设计，并减少了模拟和数字分离滤波器所需的滤波器顺序。

公开(公告)号：US20040037305A1

公开(公告)日：2004-02-26

申请号：US10434800

申请日：2003-05-09

Inventor： Jens Wildhagen ,  Dietmar Schill

IPC: H04J003/26

CPC classification number: H04H20/22 ,  H04H2201/12 ,  H04H2201/20 ,  H04L5/06

Abstract: A reduced peak simulcast signal generator and a method for generating a stable peak-attenuated simulcast signal, which combines a digital broadcast signal and an analogue broadcast signal, are described. The simulcast signal generator comprises at least one attenuation stage for attenuating the digital and/or the analogue broadcast signal in order to obtain a stable simulcast signal. Each attenuation stage comprises a simulcast signal generator for generating an error signal, and attenuation means which attenuate, in dependence of said first error signal, at least one of the analogue and the digital broadcast signal.

Abstract translation: 描述了降低峰值联播信号发生器和用于产生组合数字广播信号和模拟广播信号的稳定峰值衰减联播信号的方法。 联播信号发生器包括用于衰减数字和/或模拟广播信号的至少一个衰减级，以便获得稳定的联播信号。 每个衰减级包括用于产生误差信号的同播信号发生器，以及根据所述第一误差信号衰减模拟和数字广播信号中的至少一个的衰减装置。

公开(公告)号：US20030227985A1

公开(公告)日：2003-12-11

申请号：US10455974

申请日：2003-06-06

Inventor： Dietmar Schill ,  Jens Wildhagen

IPC: H04L027/06 ,  H03D001/00 ,  H04B001/10

CPC classification number: H04L27/2647 ,  H04B1/1081 ,  H04H2201/12 ,  H04L25/0204 ,  H04L2025/03414 ,  H04L2025/03522

Abstract: A receiver for simulcast signals and a method for receiving a simulcast signal transmitted via a distorted channel is described. By means of a bandpass filter, an initial digital signal is separated from the simulcast signal. This initial digital signal is subtracted from said simulcast signal, and as a result of the subtraction, an intermediate analogue signal is obtained. With respect to the initial digital signal, a channel estimation and equalization is performed. Thus, it is possible to estimate the channel's frequency response, to remove channel impairments due to frequency selective fading and/or to non-symmetric receiver input filter, and to generate a corrected digital signal. Said corrected digital signal, or a signal derived therefrom, is added to said intermediate analogue signal, in order to obtain the simulcast signal's analogue signal part.

Abstract translation: 描述了用于联播信号的接收机和用于接收经由失真信道发送的同播信号的方法。 通过带通滤波器，初始数字信号与同播信号分离。 从所述同播信号中减去该初始数字信号，作为减法的结果，获得中间模拟信号。 对于初始数字信号，执行信道估计和均衡。 因此，可以估计信道的频率响应，以消除由于频率选择性衰落引起的信道损伤和/或去除非对称接收机输入滤波器，并产生校正的数字信号。 为了获得联播信号的模拟信号部分，将所述校正的数字信号或从其导出的信号添加到所述中间模拟信号。

公开(公告)号：WO2017103538A1

公开(公告)日：2017-06-22

申请号：PCT/FR2016/053526

申请日：2016-12-16

Applicant: TDF

Inventor： VINCENT, David ,  FAGUE, Dimitri ,  CANNIEUX, Laurent

IPC: H04L29/08 ,  H04W4/00 ,  H04H20/20 ,  H04H20/24 ,  H04H60/41 ,  H04H60/51

CPC classification number: H04W4/02 ,  G06F17/30 ,  H04H20/20 ,  H04H20/22 ,  H04H20/24 ,  H04H20/26 ,  H04H60/41 ,  H04H60/51 ,  H04H60/85 ,  H04H2201/12 ,  H04H2201/20 ,  H04H2201/37 ,  H04H2201/60 ,  H04L65/4084 ,  H04L65/80 ,  H04L67/16 ,  H04N21/00 ,  H04W4/021 ,  H04W48/14 ,  H04W48/16

Abstract: L'invention concerne un procédé et un système de traitement. Le procédé est apte à informer un terminal (UE) sur la disponibilité d'au moins un réseau apte à diffuser sur le terminal un contenu multimédia à l'endroit où est localisé le terminal, une pluralité prédéterminée de réseaux étant apte à diffuser le contenu multimédia. Le terminal est relié à un système(SYST) comprenant une base de données stockant, pour chaque zone géographique parmi une pluralité de zones géographiques, une liste comprenant des indicateurs de disponibilité respectifs des réseaux de la pluralité prédéterminée de réseaux dans ladite zone géographique.

Abstract translation:

本发明涉及一种方法 和系统及egrave;我处理。 d＆oacute的过程; 适于＆agrave; 告诉对可用性及eacute的终端（UE）; 至少一个R E桶适于＆agrave; 终端的归属媒体内容é直径与agrave播出; 那里的地方 本地化＆eacute; 终端，多个解 PR＆eacute; d＆eac​​ute;成品＆eacute; e R＆eacute;桶＆eacute;＆agrave作为适合; 家庭媒体流内容é直径。 该终端连接＆eacute; ＆Agrave; 一个系统＆egrave;我（SYST），包括一个数据库éES存储，用于多个解中的每个区克é地理 区域G＆eacute;地理，包括的可用性及eacute指示符的列表; 各个R＆eacute;所述多个＆eacute的水桶; PRéDéTERMINéêřé在所述区域克é水桶的地理。

公开(公告)号：WO2007033866A1

公开(公告)日：2007-03-29

申请号：PCT/EP2006/065232

申请日：2006-08-10

Applicant: ROBERT BOSCH GMBH ,  HOFMANN, Frank

Inventor： HOFMANN, Frank

IPC: H04H1/00

CPC classification number: H04H20/18 ,  H04H20/22 ,  H04H20/26 ,  H04H2201/12

Abstract: Die Erfindung betrifft ein Verfahren zum Übertragen eines Datenstromes in einem digitalen Übertragungssystem, wobei der Datenstrom in einem Sendesignal mit aufeinanderfolgenden OFDM-Symbolen übertragen wird, wobei eine Anzahl von OFDM- Symbolen in einem Übertragungsrahmen zusammengefasst sind, wobei eine Anzahl von Übertragungsrahmen in einem Übertragungs-Superrahmen übertragen werden, wobei jeder Übertragungs-Superrahmen einen Informationsblock mit einem oder mehreren OFDM-Symbolen an einer festgelegten Position des Übertragungs-Superrahmen aufweist, wobei ein erstes Sendesignal (6) mit einem ersten Datenstrom in einem ersten Trägerfrequenzbereich und ein zweites Sendesignal mit einem zweiten Datenstrom mit gleichem Informationsgehalt wie der erste Datenstrom in einem zweiten Trägerfrequenzbereiches übertragen werden, wobei die Zeitdauer der Übertragungs- Superrahmen des ersten Sendesignals (6) ein ganzzahliges Vielfaches der Zeitdauer der Übertragungs-Superrahmen des zweiten Sendesignals ist.

Abstract translation: 本发明涉及一种用于在数字传输系统，其中所述数据流是与连续的OFDM符号的传输信号传输，其特征在于，多个OFDM码元被组合在一个传输帧，在传输的多个传输帧的发送数据流 超帧中传输，每个传输超帧包括在所述传输超帧的预定位置，与一个或多个OFDM符号的信息的块，其中（6），其具有在第一载波频率范围与第二的第一数据流和第二发送信号的第一发送信号 数据流与相同的信息内容如在第二载波频率范围中的第一数据流，其中所述第一传输信号（6）的传输超帧的持续时间是超帧ZW的传输的持续时间的整数倍传送 是尼特发送信号。

公开(公告)号：WO2004107603A2

公开(公告)日：2004-12-09

申请号：PCT/FR2004001296

申请日：2004-05-25

Applicant: TELEDIFFUSION FSE ,  LANOISELEE MARC ,  LOUIN PIERRICK

Inventor： LANOISELEE MARC ,  LOUIN PIERRICK

IPC: H04H20/46 ,  H04L27/26 ,  H04B7/00

CPC classification number: H04H20/46 ,  H04H20/22 ,  H04H2201/12 ,  H04H2201/186 ,  H04L27/2601

Abstract: The invention relates to a radio broadcast method for a multi-carrier digital signal (51), occupying a first frequency band adjacent to at least one second frequency band, each allocated for a second signal (52, 53), said, or at least one of said second signals being an analogue radio broadcast signal. A pre-filtering (54, 55) is applied to the first signal before the transmission thereof, such as to attenuate the power of said first signal at least in a first portion of said first frequency band, adjacent to the second frequency band(s).

Abstract translation: 本发明涉及一种用于多载波数字信号（51）的无线电广播方法，该多载波数字信号占用与至少一个第二频带相邻的第一频带，每个分配给第二信号（52,53），或至少 所述第二信号之一是模拟无线电广播信号。 在其发送之前对第一信号应用预滤波（54,55），例如至少在与第二频带相邻的所述第一频带的第一部分中衰减所述第一信号的功率 ）。