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1. 再颁专利

USRE48966E1 Time-alignment measurement for hybrid HD radio™ technology 有权
公开(公告)号：USRE48966E1
公开(公告)日：2022-03-08
申请号：US16682345
申请日：2019-11-13
申请人： Ibiquity Digital Corporation
发明人： Brian W. Kroeger , Paul J. Peyla
IPC分类号： H03D3/00 , H04L7/00 , H04L12/18 , H04H20/30 , H04H40/00 , H04H40/18 , H04H60/00 , H04H60/12
摘要： A method for processing a digital audio broadcast signal in a radio receiver, includes: receiving a hybrid broadcast signal; demodulating the hybrid broadcast signal to produce an analog audio stream and a digital audio stream; and using a normalized cross-correlation of envelopes of the analog audio stream and the digital audio stream to measure a time offset between the analog audio stream and the digital audio stream. The time offset can be used to align the analog audio stream and the digital audio stream for subsequent blending of an output of the radio receiver from the analog audio stream to the digital audio stream or from the digital audio stream to the analog audio stream.

2. 发明授权

US10355908B1 CSI estimation and LLR approximation for QAM demodulation in FM HD radio receivers 有权
公开(公告)号：US10355908B1
公开(公告)日：2019-07-16
申请号：US15913191
申请日：2018-03-06
申请人： Ibiquity Digital Corporation
发明人： Paul J. Peyla , Brian W. Kroeger
IPC分类号： H04L1/00 , H04L27/38 , H04L25/06 , H03M13/45 , H03M13/39 , H03M13/11
摘要： A radio receiver comprises physical layer circuitry and processor circuitry. The physical layer circuitry receives quadrature amplitude modulation (QAM) symbols via a plurality of subcarriers included in a broadcast radio signal. Each received QAM symbol is a complex symbol comprising multiple bits of encoded source information. The processing circuitry demodulates the received data symbols, generates a constellation sample for each received QAM symbol, generates a soft metric for each bit of encoded information of the received QAM symbols using the constellation sample, and multiplies the soft metric by a channel state information (CSI) weight to produce a Log-likelihood Ratio (LLR) approximation for each bit of encoded information of the received QAM symbols.

3. 发明申请

US20170302432A1 TIME-ALIGNMENT MEASUREMENT FOR HYBRID HD RADIO tm TECHNOLOGY 有权
公开(公告)号：US20170302432A1
公开(公告)日：2017-10-19
申请号：US15099233
申请日：2016-04-14
申请人： iBiquity Digital Corporation
发明人： Brian W. Kroeger , Paul J. Peyla
IPC分类号： H04L7/00 , H04L12/18
CPC分类号： H04L7/0041 , H04H20/30 , H04H60/12 , H04H2201/18 , H04L12/18
摘要： A method for processing a digital audio broadcast signal in a radio receiver, includes: receiving a hybrid broadcast signal; demodulating the hybrid broadcast signal to produce an analog audio stream and a digital audio stream; and using a normalized cross-correlation of envelopes of the analog audio stream and the digital audio stream to measure a time offset between the analog audio stream and the digital audio stream. The time offset can be used to align the analog audio stream and the digital audio stream for subsequent blending of an output of the radio receiver from the analog audio stream to the digital audio stream or from the digital audio stream to the analog audio stream.

4. 发明公开

US20240187299A1 Improvement In Peak-To-Average Power Ratio Reduction And Processing Efficiency For Hybrid/Digital Signals 审中-公开
公开(公告)号：US20240187299A1
公开(公告)日：2024-06-06
申请号：US18285569
申请日：2021-04-15
申请人： iBiquity Digital Corporation
发明人： Jeffrey S Baird , Paul J. Peyla
IPC分类号： H04L27/34 , H04L27/36
CPC分类号： H04L27/3411 , H04L27/366
摘要： A method comprises performing iterations of a peak-to-average ratio (PAR) reduction algorithm on a modulated OFDM symbol, each of the iterations including: clipping the modulated OFDM symbol to produce a clipped modulated OFDM symbol; subtracting the clipped modulated OFDM symbol from the modulated OFDM symbol to produce a difference signal; weighting the difference signal using a weight that varies across the iterations, to produce a weighted difference signal that varies across the iterations; subtracting the weighted difference signal from the modulated OFDM symbol to produce a modified modulated OFDM symbol; and performing further PAR reduction operations on the modified modulated OFDM symbol to produce a PAR-reduced OFDM symbol for use in a next iteration.

5. 发明申请

US20200287703A1 TIME-ALIGNMENT MEASURMENT FOR HYBRID HD TM RADIO TECHNOLOGY 审中-公开
公开(公告)号：US20200287703A1
公开(公告)日：2020-09-10
申请号：US16880070
申请日：2020-05-21
申请人： Ibiquity Digital Corporation
发明人： Brian W. Kroeger , Paul J. Peyla
IPC分类号： H04L7/00 , H04L12/18 , H04H20/30 , H04H40/18 , H04H40/00 , H04H60/00 , H04H60/12 , H04H20/18
摘要： A method for processing audio signals in a radio transmitter, includes: receiving an analog audio sample stream and a digital audio sample stream; determining offsets in time between the analog audio stream and the digital audio stream using a normalized cross-correlation of audio envelopes of the analog audio sample stream and the digital audio sample stream; filtering the determined offsets in time to produce filtered offset values; determining an alignment slip adjustment value as a function of the filtered offset values; aligning the analog audio sample stream and the digital audio sample stream using the determined alignment slip adjustment value; and generating a hybrid radio signal for broadcast that includes time-aligned analog audio and digital audio.

6. 发明申请

US20190190691A1 TIME-ALIGNMENT MEASURMENT FOR HYBRID HD RADIO TECHNOLOGY 审中-公开
公开(公告)号：US20190190691A1
公开(公告)日：2019-06-20
申请号：US16284586
申请日：2019-02-25
申请人： Ibiquity Digital Corporation
发明人： Brian W. Kroeger , Paul J. Peyla
IPC分类号： H04L7/00 , H04L12/18 , H04H20/30 , H04H60/12 , H04H40/18 , H04H40/00 , H04H60/00
摘要： A method for processing audio signals in a radio transmitter, includes: receiving an analog audio sample stream and a digital audio sample stream; determining offsets in time between the analog audio stream and the digital audio stream using a normalized cross-correlation of audio envelopes of the analog audio sample stream and the digital audio sample stream; filtering the determined offsets in time to produce filtered offset values; determining an alignment slip adjustment value as a function of the filtered offset values; aligning the analog audio sample stream and the digital audio sample stream using the determined alignment slip adjustment value; and generating a hybrid radio signal for broadcast that includes time-aligned analog audio and digital audio.

7. 发明授权

US09768853B1 Method and apparatus for blending an audio signal in an in-band on-channel radio system 有权
公开(公告)号：US09768853B1
公开(公告)日：2017-09-19
申请号：US15071389
申请日：2016-03-16
申请人： iBiquity Digital Corporation
发明人： Brian W. Kroeger , Paul J. Peyla , Jeffrey S. Baird
IPC分类号： G06F11/10 , H04B7/08 , H04B1/10 , H04H20/22 , H04H40/18 , H04L1/00 , H04L7/00
CPC分类号： H04B7/0885 , H04B1/1027 , H04H20/22 , H04H20/30 , H04H40/18 , H04H60/11 , H04H60/12 , H04H2201/18 , H04L1/0045 , H04L1/0061 , H04L7/0054
摘要： A method for processing a digital audio broadcast signal in a radio receiver includes: receiving a digital audio broadcast signal; demodulating the digital audio broadcast signal to produce an analog audio stream and a digital audio stream; determining a digital signal quality value for the digital audio stream; blending an output of the radio receiver from the analog audio stream to the digital audio stream when the digital signal quality value exceeds an adaptive analog-to-digital threshold value; and blending the output of the radio receiver from the digital audio stream to the analog audio stream when the digital signal quality value falls below an adaptive digital-to-analog threshold value, wherein the adaptive digital-to-analog threshold value is lower than the adaptive analog-to-digital threshold value.

8. 发明授权

US09178548B1 First adjacent canceller (FAC) with improved blending using a parametric filter 有权
标题翻译：第一个相邻消除器（FAC），使用参数滤波器改进混合
公开(公告)号：US09178548B1
公开(公告)日：2015-11-03
申请号：US14257286
申请日：2014-04-21
申请人： iBiquity Digital Corporation
发明人： Brian W. Kroeger , Paul J. Peyla
IPC分类号： H04B1/10
CPC分类号： H04B1/1036 , H04B1/109 , H04B2001/1045 , H04B2001/1063 , H04H20/31 , H04H2201/183
摘要： A method for processing a radio signal includes: receiving an FM in-band on-channel radio signal including a plurality of digitally modulated subcarriers in upper and lower sidebands; sampling the FM in-band on-channel radio signal to produce an input signal including complex digital samples of a combination of a desired one the upper and lower sidebands and an FM interferer; removing FM interferer components from the first signal by notch filtering to produce a notch-filtered signal; weighting the notch-filtered signal to produce a weighted notch-filtered signal; using a parametric filter to filter the input signal to produce a parametric-filtered input signal; and combining the weighted notch-filtered signal and the parametric-filtered input signal to produce an output signal. A radio receiver that implements the method is also included.
摘要翻译：一种处理无线电信号的方法包括：在上边带和下边带中接收包括多个数字调制子载波的FM带内通道无线电信号; 对FM带内通道无线电信号进行采样以产生包括上边带和下边带期望的一个组合的复数数字采样和FM干扰源的输入信号; 通过陷波滤波从第一信号中去除FM干扰源分量以产生陷波滤波信号; 加权陷波滤波信号以产生加权陷波滤波信号; 使用参数滤波器对输入信号进行滤波以产生参数滤波的输入信号; 以及组合加权陷波滤波信号和参数滤波输入信号以产生输出信号。还包括实现该方法的无线电接收机。

9. 发明授权

US10727980B2 Lumb service modes for FM HD radio broadcasts 有权
公开(公告)号：US10727980B2
公开(公告)日：2020-07-28
申请号：US15983244
申请日：2018-05-18
申请人： Ibiquity Digital Corporation
发明人： Paul J. Peyla , Brian W. Kroeger , Jeffrey S. Baird
IPC分类号： H04L1/00 , H04L27/34 , H03M13/03
摘要： A radio transmitter comprises transmitting circuitry and processing circuitry. The transmitting circuitry broadcasts a frequency modulation (FM) in-band on-channel (IBOC) radio signal, wherein the FM IBOC radio signal includes multiple subcarriers grouped into multiple frequency partitions. The processing circuitry is configured to receive input bits for transmitting; encode and puncture the input bits using forward error correction (FEC) encoding; distribute encoded input bits between a main encoded component and a backup encoded component, wherein encoded bits of the backup encoded component are delayed for a specified duration relative to encoded bits of the main encoded component; allocate the encoded input bits of the main and backup encoded components into frequency diverse sidebands of the FM IBOC radio signal; and modulate the encoded input bits for transmitting using the frequency diverse sidebands of the FM IBOC radio signal, wherein the modulation is a type of quadrature amplitude modulation (QAM).

10. 发明授权

US10225070B2 Time-alignment measurment for hybrid HD radio technology 有权
公开(公告)号：US10225070B2
公开(公告)日：2019-03-05
申请号：US15822411
申请日：2017-11-27
申请人： Ibiquity Digital Corporation
发明人： Brian W. Kroeger , Paul J. Peyla
IPC分类号： H04H20/30 , H04H40/00 , H04H40/18 , H04H60/00 , H04H60/12 , H03D3/00 , H04L7/00 , H04L12/18
摘要： A method for processing a digital audio broadcast signal in a radio receiver, includes: receiving a hybrid broadcast signal; demodulating the hybrid broadcast signal to produce an analog audio stream and a digital audio stream; and using a normalized cross-correlation of envelopes of the analog audio stream and the digital audio stream to measure a time offset between the analog audio stream and the digital audio stream. The time offset can be used to align the analog audio stream and the digital audio stream for subsequent blending of an output of the radio receiver from the analog audio stream to the digital audio stream or from the digital audio stream to the analog audio stream.

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