公开(公告)号：WO0027040A9

公开(公告)日：2000-10-19

申请号：PCT/US9925300

申请日：1999-10-28

Applicant: USA DIGITAL RADIO INC

Inventor： KROEGER BRIAN WILLIAM ,  BAIRD JEFFREY SCOTT

IPC: H04J11/00 ,  H04B1/00 ,  H04B1/10 ,  H04B1/16 ,  H04H20/82 ,  H04H40/27 ,  H04H1/00

CPC classification number: H04B1/109 ,  H04H40/27 ,  H04H2201/183 ,  H04L25/03006

Abstract: This invention provides a method for reducing FM interference in an in-band on-channel digital audio broadcasting system. The method includes the steps of receiving a composite signal including a signal of interest and an interfering signal and normalizing the composite signal to produce a normalized composite signal. The composite signal is then multiplied by the complex conjugate of the normalized composite signal to produce a real signal. Then the real signal is filtered and the resulting filtered signal is multiplied by the normalized composite signal to produce an output signal. The adverse effects of the interfering signal in the output signal are reduced with respect to the magnitude of the signal of interest reducing FM interference in an in-band on-channel digital audio broadcasting system, thereby making it easier to detect the signal of interest. The output signal and the composite can be blended in response to the power of the real and filtered signals. Radio receivers that utilize the above method are also included.

Abstract translation: 本发明提供一种降低带内同频数字音频广播系统中的FM干扰的方法。 该方法包括以下步骤：接收包括感兴趣的信号和干扰信号的复合信号，并对复合信号进行归一化以产生归一化复合信号。 然后将复合信号乘以归一化复合信号的复共轭以产生实信号。 然后对实信号进行滤波，并将得到的滤波信号乘以归一化复合信号以产生输出信号。 输出信号中的干扰信号的不利影响相对于感兴趣的信号的幅度减小，从而降低带内同频数字音频广播系统中的FM干扰，从而使得更容易检测感兴趣的信号。 可以根据实际和滤波信号的功率来混合输出信号和复合信号。 还包括利用上述方法的无线电接收机。

公开(公告)号：WO9950980B1

公开(公告)日：2000-01-27

申请号：PCT/US9904328

申请日：1999-02-24

Applicant: USA DIGITAL RADIO INC

Inventor： KROEGER WILLIAM ,  CAMMARATA DENISE MAUREEN ,  MARTINSON RICHARD EDWARD ,  BAIRD JEFFREY SCOTT ,  PEYLA PAUL JAMES ,  WALDEN E GLYNN

IPC: H04H20/48 ,  H04B1/04 ,  H04J11/00 ,  H04L5/02 ,  H04L5/06 ,  H04L27/26 ,  H04H1/00

CPC classification number: H04H20/30 ,  H04H2201/20 ,  H04L5/023 ,  H04L27/2602 ,  Y02D70/00

Abstract: This invention provides a method of broadcasting including the steps of providing a broadcast signal in a central frequency band of an FM radio channel; providing a first plurality of sub-carriers in an upper sideband of the FM radio channel; providing a second plurality of sub-carriers in a lower sideband of the FM radio channel; modulating a first group of the first plurality of sub-carriers with a complementary punctured convolution coded encoded version of program material; modulating a first group of the second plurality of sub-carriers with the complementary punctured convolution coded version of the program material; and transmitting the broadcast signal, the first group of the first plurality of sub-carriers and the first group of the second plurality of sub-carriers. In an all-digital version of the invention, the central frequency band may include a plurality of sub-carriers transmitted at a lower power level than that of the sub-carriers in the upper and lower sidebands. These additional sub-carriers can be used to transmit additional data. Transmitters and receivers which utilized the method are also included.

Abstract translation: 本发明提供一种广播方法，包括以下步骤：在FM无线电信道的中心频带中提供广播信号; 在所述FM无线电信道的上边带中提供第一多个子载波; 在所述FM无线电信道的下边带中提供第二多个子载波; 用编程材料的互补的打褶卷积编码版本调制所述第一多个子载波的第一组; 用所述节目素材的互补穿孔卷积编码版本调制所述第二组多个子载波的第一组; 以及发送广播信号，第一组第一多个子载波和第一组第二多个子载波。 在本发明的全数字版本中，中心频带可以包括以比上侧和下侧边带中的子载波低的功率电平发射的多个子载波。 这些附加子载波可用于传输附加数据。 还包括使用该方法的发射机和接收机。

公开(公告)号：WO0027040A3

公开(公告)日：2000-11-23

申请号：PCT/US9925300

申请日：1999-10-28

Applicant: USA DIGITAL RADIO INC

Inventor： KROEGER BRIAN WILLIAM ,  BAIRD JEFFREY SCOTT

IPC: H04J11/00 ,  H04B1/00 ,  H04B1/10 ,  H04B1/16 ,  H04H20/82 ,  H04H40/27 ,  H04H1/10

CPC classification number: H04B1/109 ,  H04H40/27 ,  H04H2201/183 ,  H04L25/03006

Abstract: This invention provides a method for reducing FM interference in an in-band on-channel digital audio broadcasting system. The method includes the steps of receiving a composite signal including a signal of interest and an interfering signal and normalizing the composite signal to produce a normalized composite signal. The composite signal is then multiplied by the complex conjugate of the normalized composite signal to produce a real signal. Then the real signal is filtered and the resulting filtered signal is multiplied by the normalized composite signal to produce an output signal. The adverse effects of the interfering signal in the output signal are reduced with respect to the magnitude of the signal of interest reducing FM interference in an in-band on-channel digital audio broadcasting system, thereby making it easier to detect the signal of interest. The output signal and the composite can be blended in response to the power of the real and filtered signals. Radio receivers that utilize the above method are also included.

Abstract translation: 本发明提供了一种用于降低带内同频数字音频广播系统中的FM干扰的方法。 该方法包括以下步骤：接收包括感兴趣信号和干扰信号的复合信号，并对复合信号进行归一化以产生归一化复合信号。 复合信号然后乘以归一化复合信号的复共轭以产生实信号。 然后对实信号进行滤波并将得到的滤波信号乘以标准化的复合信号以产生输出信号。 输出信号中的干扰信号的不利影响相对于在带内同频道数字音频广播系统中降低FM干扰的感兴趣信号的幅度减小，由此使得更容易检测感兴趣的信号。 输出信号和复合信号可以根据真实信号和滤波信号的功率进行混合。 还包括利用上述方法的无线电接收器。

公开(公告)号：WO9950980A3

公开(公告)日：1999-11-18

申请号：PCT/US9904328

申请日：1999-02-24

Applicant: USA DIGITAL RADIO INC

Inventor： KROEGER WILLIAM ,  CAMMARATA DENISE MAUREEN ,  MARTINSON RICHARD EDWARD ,  BAIRD JEFFREY SCOTT ,  PEYLA PAUL JAMES ,  WALDEN E GLYNN

IPC: H04H20/48 ,  H04B1/04 ,  H04J11/00 ,  H04L5/02 ,  H04L5/06 ,  H04L27/26 ,  H04H1/00

CPC classification number: H04H20/30 ,  H04H2201/20 ,  H04L5/023 ,  H04L27/2602 ,  Y02D70/00

Abstract: This invention provides a method of broadcasting including the steps of providing a broadcast signal in a central frequency band of an FM radio channel; providing a first plurality of sub-carriers in an upper sideband of the FM radio channel; providing a second plurality of sub-carriers in a lower sideband of the FM radio channel; modulating a first group of the first plurality of sub-carriers with a complementary punctured convolution coded encoded version of program material; modulating a first group of the second plurality of sub-carriers with the complementary punctured convolution coded version of the program material; and transmitting the broadcast signal, the first group of the first plurality of sub-carriers and the first group of the second plurality of sub-carriers. In an all-digital version of the invention, the central frequency band may include a plurality of sub-carriers transmitted at a lower power level than that of the sub-carriers in the upper and lower sidebands. These additional sub-carriers can be used to transmit additional data. Transmitters and receivers which utilized the method are also included.

Abstract translation: 本发明提供一种广播方法，包括以下步骤：在FM无线电信道的中心频带中提供广播信号; 在所述FM无线电信道的上边带中提供第一多个子载波; 在所述FM无线电信道的下边带中提供第二多个子载波; 用编程材料的互补的打褶卷积编码版本调制所述第一多个子载波的第一组; 用所述节目素材的互补穿孔卷积编码版本调制所述第二组多个子载波的第一组; 以及发送广播信号，第一组第一多个子载波和第一组第二多个子载波。 在本发明的全数字版本中，中心频带可以包括以比上侧和下侧边带中的子载波更低的功率电平发射的多个子载波。 这些附加子载波可用于传输附加数据。 还包括使用该方法的发射机和接收机。

公开(公告)号：BR9909174A

公开(公告)日：2000-12-05

申请号：BR9909174

申请日：1999-02-24

Applicant: USA DIGITAL RADIO INC

Inventor： KROEGER WILLIAM ,  CAMMARATA DENISE MAUREEN ,  MARTINSON RICHARD EDWARD ,  BAIRD JEFFREY SCOTT ,  PEYLA PAUL JAMES ,  WALDEN E GLYNN

IPC: H04H20/48 ,  H04B1/04 ,  H04J11/00 ,  H04L5/02 ,  H04L5/06 ,  H04L27/26 ,  H04H1/00

Abstract: This invention provides a method of broadcasting including the steps of providing a broadcast signal in a central frequency band of an FM radio channel; providing a first plurality of sub-carriers in an upper sideband of the FM radio channel; providing a second plurality of sub-carriers in a lower sideband of the FM radio channel; modulating a first group of the first plurality of sub-carriers with a complementary punctured convolution coded encoded version of program material; modulating a first group of the second plurality of sub-carriers with the complementary punctured convolution coded version of the program material; and transmitting the broadcast signal, the first group of the first plurality of sub-carriers and the first group of the second plurality of sub-carriers. In an all-digital version of the invention, the central frequency band may include a plurality of sub-carriers transmitted at a lower power level than that of the sub-carriers in the upper and lower sidebands. These additional sub-carriers can be used to transmit additional data. Transmitters and receivers which utilized the method are also included.

公开(公告)号：CA2326318C

公开(公告)日：2009-04-28

申请号：CA2326318

申请日：1999-02-24

Applicant: USA DIGITAL RADIO INC

Inventor： MARTINSON RICHARD EDWARD ,  CAMMARATA DENISE MAUREEN ,  WALDEN E GLYNN ,  KROEGER BRIAN WILLIAM ,  PEYLA PAUL JAMES ,  BAIRD JEFFREY SCOTT

IPC: H04H20/48 ,  H04B1/04 ,  H04J11/00 ,  H04L5/02 ,  H04L5/06 ,  H04L27/26

Abstract: This invention provides a method of broadcasting including the steps of providing a broadcast signal in a central frequency band of an FM radio channel; providing a first plurality of sub-carriers in an upper sideband of the FM radio channel; providing a second plurality of sub-carriers in a lower sideband of the FM radio channel; modulating a first group of the first plurality of sub-carriers with a complementary punctured convolution coded encoded version of program material; modulating a first group of the second plurality of sub-carriers with the complementary punctured convolution coded version of the program material; and transmitting the broadcast signal, the first group of the first plurality of sub-carriers and the first group of the second plurality of sub-carriers. In an all-digital version of the invention, the central frequency band may include a plurality of sub-carriers transmitted at a lower power level than that of the sub-carriers in the upper and lower sidebands. These additional sub-carriers can be used to transmit additional data. Transmitters and receivers which utilized the method are also included.

公开(公告)号：CA2326318A1

公开(公告)日：1999-10-07

申请号：CA2326318

申请日：1999-02-24

Applicant: USA DIGITAL RADIO INC

Inventor： WALDEN E GLYNN ,  PEYLA PAUL JAMES ,  KROEGER WILLIAM ,  MARTINSON RICHARD EDWARD ,  BAIRD JEFFREY SCOTT ,  CAMMARATA DENISE MAUREEN

IPC: H04H20/48 ,  H04B1/04 ,  H04J11/00 ,  H04L5/02 ,  H04L5/06 ,  H04L27/26 ,  H04H1/00

Abstract: This invention provides a method of broadcasting including the steps of providing a broadcast signal in a central frequency band of an FM radio channel; providing a first plurality of sub-carriers in an upper sideband of the FM radio channel; providing a second plurality of sub-carriers in a lower sideband of the FM radio channel; modulating a first group of the first plurality of sub-carriers with a complementary punctured convolution coded encoded version of program material; modulating a first group of the second plurality of sub-carriers with the complementary punctured convolution coded version of the program material; and transmitting the broadcast signal, the first group of the first plurality of sub-carriers and the first group of the second plurality of sub-carriers. In an all-digital version of the invention, the central frequency band may include a plurality of sub-carriers transmitted at a lower power level than that of the sub-carriers in the upper and lower sidebands. These additional sub-carriers can be used to transmit additional data. Transmitters and receivers which utilized the method are also included.