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。