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公开(公告)号：EP4214864A1
公开(公告)日：2023-07-26
申请号：EP21722341.1
申请日：2021-04-09
发明人： MUNDSCHENK, Russ , CHALMERS, Harvey
IPC分类号： H04H20/22 , H04N21/426 , H04N21/462 , H04W4/06
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公开(公告)号：EP3186939B1
公开(公告)日：2020-01-01
申请号：EP15756763.7
申请日：2015-08-18
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3.发明公开SYSTEMS AND METHODS FOR AUTOMATED DETECTION OF SIGNAL QUALITY IN DIGITAL RADIO BROADCAST SIGNALS 审中-公开用于在数字无线电广播信号中自动检测信号质量的系统和方法
公开(公告)号：EP3281315A1
公开(公告)日：2018-02-14
申请号：EP16777373.8
申请日：2016-04-08
CPC分类号： H04H20/12 , H04H60/29 , H04H2201/20
摘要： Systems, methods, and processor readable media are disclosed for detection of signal quality problems and errors in digital radio broadcast signals. First monitoring equipment is located in an over-the-air coverage area of a first radio station. Second monitoring equipment is located in an over-the-air coverage area of a second radio station. The first and second monitoring equipment are configured to receive digital radio broadcast signals from the respective first and second radio stations. A computing system is configured to receive data from the first monitoring equipment and the second monitoring equipment, the data being indicative of one or more attributes of a digital radio broadcast signal received at respective monitoring equipment. The computing system analyzes received data to detect a signal quality problem or error in the digital radio broadcast signals received at the first and second monitoring equipment.
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4.发明公开PEAK-TO-AVERAGE POWER RATIO REDUCTION FOR QAM MODULATION WITH HD RADIO SIGNALS 审中-公开高清无线电信号QAM调制的峰值平均功率比降低
公开(公告)号：EP3186939A1
公开(公告)日：2017-07-05
申请号：EP15756763.7
申请日：2015-08-18
IPC分类号： H04L27/34
摘要： A peak-to-average power reduction method includes: (a) quadrature amplitude modulating a signal including a set of subcarriers with a set of data to produce an OFDM modulated symbol vector; (b) limiting the magnitude of the modulated symbol vector to produce a first limited OFDM modulated symbol; (c) demodulating the first limited OFDM modulated symbol to recover distorted QAM constellations; (d) constraining points in the distorted QAM constellations recovered from the first limited OFDM modulated symbol to produce constrained QAM constellations; (e) modulating an OFDM symbol vector with the constrained QAM constellations to produce a modified modulated OFDM symbol; and (f) output the modified modulated OFDM symbol. A transmitter that implements the method is also provided.
摘要翻译： 峰均功率降低方法包括：（a）用一组数据对包括一组子载波的信号进行正交幅度调制，以产生OFDM调制符号矢量; （b）限制调制符号向量的幅度以产生第一有限的OFDM调制符号; （c）解调第一有限OFDM调制符号以恢复失真QAM星座; （d）约束从第一有限OFDM调制符号恢复的失真QAM星座中的点以产生约束QAM星座; （e）用所述受约束的QAM星座调制OFDM符号矢量以产生经修改的经调制的OFDM符号; 和（f）输出修改的经调制的OFDM符号。 还提供了实现该方法的发送器。
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5.发明公开METHOD FOR ALIGNMENT OF ANALOG AND DIGITAL AUDIO IN A HYBRID RADIO WAVEFORM 审中-公开方法同步数字音频模拟，并在混合无线电信号方式
公开(公告)号：EP1867078A1
公开(公告)日：2007-12-19
申请号：EP06721125.0
申请日：2006-03-01
IPC分类号： H04H1/00
CPC分类号： H04H20/30 , H04H20/12 , H04H2201/183 , H04H2201/186
摘要： This invention provides a method of detecting time alignment of an analog audio signal and a digital audio signal in a hybrid radio system. The method comprises the steps of filtering the analog audio signal to produce a filtered analog audio signal, filtering the digital audio signal to produce a filtered digital audio signal, and using the filtered analog audio signal and the filtered digital audio signal to calculate a plurality of correlation coefficients, wherein the correlation coefficients are representative of time alignment between the analog audio signal and the digital audio signal. An apparatus for performing the method is also provided.
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