公开(公告)号：US07266097B2

公开(公告)日：2007-09-04

申请号：US10675945

申请日：2003-10-02

申请人： Louis Mimis Christodoulides ,  Howard Ray Feldman ,  Eyal Trachtman ,  Siu Wah Wong ,  Hok Shuen Wong

发明人： Louis Mimis Christodoulides ,  Howard Ray Feldman ,  Eyal Trachtman ,  Siu Wah Wong ,  Hok Shuen Wong

IPC分类号： H04B7/185

CPC分类号： H04L29/06 ,  H04B7/18513 ,  H04B7/18532 ,  H04L1/0042 ,  H04L1/0066 ,  H04L1/0072 ,  H04L1/0078 ,  H04L1/0083 ,  H04L27/3466 ,  H04L69/324 ,  H04W4/18 ,  H04W28/22 ,  H04W48/08 ,  H04W72/00 ,  H04W84/06

摘要： A set of formats and protocols is proposed for a satellite communications system. In these formats, a pilot signal (PS) is inserted after every 25 or 29 data symbols. The formats consist of SCPC frames (F) which may contain either data (D) and in-band signaling information (SU), or only signaling information (SU). In either case, the contents of each frame (F) are error-correction coded before transmission with the same coding rate. Each data frame (F) carries the data content of an integral number of input user data frames (M), each of which comprises four subframes. Different symbol transmission rates are used for different input data rates, the symbol transmission rates being selected so that their different synchronizing clock rates can easily be obtained from a common clock. Data bursts may be preceded by a constant power level preamble (P). The formats and protocols satisfy the requirements of a high data rate satellite communications system.

摘要翻译： 为卫星通信系统提出了一套格式和协议。 在这些格式中，每25或29个数据符号插入导频信号（PS）。 这些格式包括可以包含数据（D）和带内信令信息（SU）的SCPC帧（F），或只包含信令信息（SU）。 在这两种情况下，每帧（F）的内容在具有相同编码率的传输之前进行纠错编码。 每个数据帧（F）携带整数个输入用户数据帧（M）的数据内容，每个数据帧包括四个子帧。 对于不同的输入数据速率使用不同的符号传输速率，选择符号传输速率使得它们可以容易地从公共时钟获得不同的同步时钟速率。 数据脉冲串之前可以有恒定的功率电平前导码（P）。 格式和协议满足高数据速率卫星通信系统的要求。

公开(公告)号：US20100008289A1

公开(公告)日：2010-01-14

申请号：US12497339

申请日：2009-07-02

申请人： Carl Scarpa

发明人： Carl Scarpa

IPC分类号： H04B7/185 ,  H04L27/38 ,  H04H20/74

CPC分类号： H04L27/22 ,  H04B1/1027 ,  H04L27/3466

摘要： In exemplary embodiments of the present invention, a degree of hierarchical modulation can be varied as a function of satellite position, which can be related to time of day, and where such hierarchical modulation can be a combination of phase and amplitude shifts. In exemplary embodiments of the present invention, as each satellite in a multiple satellite system broadcasting to North America moves towards a D-node or an A-node position, the offset angle of a phase-based hierarchical modulation scheme can be varied. Thus, in exemplary embodiments of the present invention, the lowest satellite position in the sky can have the lowest offset angle for overlay bits, which offset angle can, for example, progressively increase as the position of the satellite in the sky increases. At a satellite's highest point in the sky, the overlay offset angle can, for example, thus be at its maximum. To aid a receiver to receive such varying overlay modulated data, the value of a varying overlay offset angle (for each satellite) can be embedded in an Overlay Identification Marker (OIM) in the bit stream broadcast by that satellite. In exemplary embodiments of the present invention each satellite broadcast receiver can thus decode each satellite's signal, knowing its respective instantaneous overlay offset angle. The receiver can then use this information to appropriately correct MRC weightings (weighting more heavily the (higher lying) satellite with the higher degree of Layer 2 modulation) before it is MRC combined across various received signal streams. Similar methods can be implemented for other overlay modulation techniques, and the method can be extended to a broadcast system using N satellites, each having a varying degree of Layer 2 modulation.

摘要翻译： 在本发明的示例性实施例中，分级调制的程度可以随卫星位置的函数而变化，这可以与时间有关，并且其中这种分层调制可以是相位和幅度相移的组合。 在本发明的示例性实施例中，由于向北美广播的多个卫星系统中的每个卫星朝向D节点或A节点位置移动，因此可以改变基于相位的分层调制方案的偏移角。 因此，在本发明的示例性实施例中，天空中最低的卫星位置可以具有覆盖比特的最低偏移角，当天空中的卫星的位置增加时，偏移角可以例如逐渐增加。 在卫星的天空最高点，覆盖偏移角例如可以达到最大值。 为了帮助接收机接收这种变化的重叠调制数据，可以将该改变的覆盖偏移角（对于每个卫星）的值嵌入在由该卫星广播的比特流中的覆盖识别标记（OIM）中。 在本发明的示例性实施例中，每个卫星广播接收机可以解码每个卫星的信号，知道其相应的瞬时覆盖偏移角。 然后，接收机可以在MRC组合在各种接收信号流之前，使用该信息来适当地校正MRC权重（用较高层次的2调制度对更高级别的卫星进行加权）。 可以对其他覆盖调制技术实现类似的方法，并且该方法可以扩展到使用N个卫星的广播系统，每个卫星具有不同程度的第2层调制。

公开(公告)号：US20070195868A1

公开(公告)日：2007-08-23

申请号：US11789600

申请日：2007-04-25

申请人： Glenn Walker ,  Eric Dibiaso ,  Michael Hiatt

发明人： Glenn Walker ,  Eric Dibiaso ,  Michael Hiatt

IPC分类号： H04B3/36

CPC分类号： H04L27/3466 ,  H04B7/18513 ,  H04L27/3488

摘要： This invention provides a receiver for use in a SDAR system which includes a receiving unit having satellite signal detection means for detecting a first transmit signal transmitted from a first communication satellite and a second transmit signal transmitted from a second communication satellite, the first transmit signal produced when the transmitter modulates a primary data stream with a secondary data stream on a first carrier wave associated with the first communication satellite and the second transmit signal produced when the transmitter modulates the primary and secondary data streams on a second carrier wave associated with the second communication satellite, and an encoder re-encodes the primary and the secondary data on a third carrier wave, forming a third transmit signal which is re-transmitted to a receiver using a terrestrial repeater. This invention also provides a method of receiving transmitted data.

摘要翻译： 本发明提供了一种在SDAR系统中使用的接收机，其包括具有卫星信号检测装置的接收单元，用于检测从第一通信卫星发射的第一发射信号和从第二通信卫星发射的第二发射信号，产生第一发射信号 当所述发射机在与所述第一通信卫星相关联的第一载波上用辅助数据流调制主要数据流时，以及当所述发射机在与所述第二通信相关联的第二载波上调制所述主要和次要数据流时产生的所述第二发射信号 卫星，并且编码器对第三载波上的主要和次要数据进行重新编码，形成第三发射信号，该第三发射信号使用陆地中继器再传送到接收机。 本发明还提供一种接收传输数据的方法。

公开(公告)号：US09154351B2

公开(公告)日：2015-10-06

申请号：US13906653

申请日：2013-05-31

申请人： Sirius XM Radio In.

发明人： Carl Scarpa

IPC分类号： H04L27/22 ,  H04L27/34

CPC分类号： H04L27/22 ,  H04B1/1027 ,  H04L27/3466

摘要： Degree of hierarchical modulation can be varied as a function of satellite position, where such hierarchical modulation can be a combination of phase and amplitude shifts. As each satellite in a multiple satellite system moves towards a D-node or an A-node position, the offset angle of a phase-based hierarchical modulation scheme can be varied. Starting with the lowest satellite position in the sky an offset angle for overlay bits can progressively increase as the position of the satellite in the sky increases. At a satellite's highest point in the sky, the overlay offset angle can be at its maximum. The value of a varying overlay offset angle (for each satellite) can be embedded in an Overlay Identification Marker (OIM) in the broadcast. The receiver can then appropriately correct MRC weightings (weighting more heavily the (higher lying) satellite).

摘要翻译： 层次调制度可以作为卫星位置的函数而变化，其中这种分层调制可以是相位和幅度偏移的组合。 当多卫星系统中的每个卫星向D节点或A节点位置移动时，可以改变基于相位的分层调制方案的偏移角。 从天空中最低的卫星位置开始，重叠位的偏移角随着天空中卫星的位置的增加而逐渐增加。 卫星在天空的最高点，覆盖偏移角可以在其最大值。 变化的覆盖偏移角（对于每个卫星）的值可以嵌入在广播中的覆盖识别标记（OIM）中。 然后，接收机可以适当地校正MRC权重（对（较高位）的卫星进行加权）。

公开(公告)号：US20140010325A1

公开(公告)日：2014-01-09

申请号：US13906653

申请日：2013-05-31

申请人： Sirius XM Radio In.

发明人： Carl Scarpa

IPC分类号： H04L27/22

CPC分类号： H04L27/22 ,  H04B1/1027 ,  H04L27/3466

摘要： Degree of hierarchical modulation can be varied as a function of satellite position, where such hierarchical modulation can be a combination of phase and amplitude shifts. As each satellite in a multiple satellite system moves towards a D-node or an A-node position, the offset angle of a phase-based hierarchical modulation scheme can be varied. Starting with the lowest satellite position in the sky an offset angle for overlay bits can progressively increase as the position of the satellite in the sky increases. At a satellite's highest point in the sky, the overlay offset angle can be at its maximum. The value of a varying overlay offset angle (for each satellite) can be embedded in an Overlay Identification Marker (OIM) in the broadcast. The receiver can then appropriately correct MRC weightings (weighting more heavily the (higher lying) satellite).

摘要翻译： 层次调制度可以作为卫星位置的函数而变化，其中这种分层调制可以是相位和幅度偏移的组合。 当多卫星系统中的每个卫星向D节点或A节点位置移动时，可以改变基于相位的分层调制方案的偏移角。 从天空中最低的卫星位置开始，重叠位的偏移角随着天空中卫星的位置的增加而逐渐增加。 卫星在天空的最高点，覆盖偏移角可以在其最大值。 变化的覆盖偏移角（对于每个卫星）的值可以嵌入在广播中的覆盖识别标记（OIM）中。 然后，接收机可以适当地校正MRC权重（对（较高位）的卫星进行加权）。

公开(公告)号：US20050111579A1

公开(公告)日：2005-05-26

申请号：US10847944

申请日：2004-05-18

申请人： Glenn Walker ,  Eric Dibiaso ,  Michael Hiatt

发明人： Glenn Walker ,  Eric Dibiaso ,  Michael Hiatt

IPC分类号： H04B7/185 ,  H04L27/34 ,  H04L27/20

CPC分类号： H04L27/3466 ,  H04B7/18513 ,  H04L27/3488

摘要： The present invention provides a receiver for use in a SDAR system, the receiver including a receiving unit having satellite signal detection means for detecting a first transmit signal transmitted from a first communication satellite and a second transmit signal transmitted from a second communication satellite, the first transmit signal produced when the transmitter modulates a primary data stream with a secondary data stream on a first carrier wave associated with the first communication satellite and the second transmit signal produced when the transmitter modulates the primary and secondary data streams on a second carrier wave associated with the second communication satellite; and at least one demodulator coupled to the receiving unit and configured to demodulate the at least one of the first and the second transmit signals.

摘要翻译： 本发明提供了一种在SDAR系统中使用的接收机，该接收机包括具有卫星信号检测装置的接收单元，用于检测从第一通信卫星发射的第一发射信号和从第二通信卫星发送的第二发射信号，第一 当发射机利用辅助数据流在与第一通信卫星相关联的第一载波上调制主数据流时产生的发射信号和当发射机在与第一通信卫星相关联的第二载波上调制主要和次要数据流时产生的第二发射信号 第二通信卫星; 以及耦合到所述接收单元并被配置为解调所述第一和第二发射信号中的至少一个的至少一个解调器。

公开(公告)号：US20040114547A1

公开(公告)日：2004-06-17

申请号：US10675945

申请日：2003-10-02

申请人： Inmarsat, Ltd.

发明人： Louis Mimis Christodoulides ,  Howard Ray Feldman ,  Eyal Trachtman ,  Siu Wah Wong ,  Hok Shuen Wong

IPC分类号： H04B007/185

CPC分类号： H04L29/06 ,  H04B7/18513 ,  H04B7/18532 ,  H04L1/0042 ,  H04L1/0066 ,  H04L1/0072 ,  H04L1/0078 ,  H04L1/0083 ,  H04L27/3466 ,  H04L69/324 ,  H04W4/18 ,  H04W28/22 ,  H04W48/08 ,  H04W72/00 ,  H04W84/06

摘要： A set of formats and protocols is proposed for a satellite communications system. In these formats, a pilot signal (PS) is inserted after every 25 or 29 data symbols. The formats consist of SCPC frames (F) which may contain either data (D) and in-band signalling information (SU), or only signalling information (SU). In either case, the contents of each frame (F) are error-correction coded before transmission with the same coding rate. Each data frame (F) carries the data content of an integral number of input user data frames (M), each of which comprises four subframes. Different symbol transmission rates are used for different input data rates, the symbol transmission rates being selected so that their different synchronising clock rates can easily be obtained from a common clock. Data bursts may be preceded by a constant power level preamble (P). The formats and protocols satisfy the requirements of a high data rate satellite communications system.

摘要翻译： 为卫星通信系统提出了一套格式和协议。 在这些格式中，每25或29个数据符号插入导频信号（PS）。 这些格式包括可以包含数据（D）和带内信令信息（SU）的SCPC帧（F），或只包含信令信息（SU）。 在这两种情况下，每帧（F）的内容在具有相同编码率的传输之前进行纠错编码。 每个数据帧（F）携带整数个输入用户数据帧（M）的数据内容，每个数据帧包括四个子帧。 对于不同的输入数据速率使用不同的符号传输速率，选择符号传输速率使得它们可以容易地从公共时钟获得不同的同步时钟速率。 数据脉冲串之前可以有恒定的功率电平前导码（P）。 格式和协议满足高数据速率卫星通信系统的要求。

公开(公告)号：US08457037B2

公开(公告)日：2013-06-04

申请号：US12497339

申请日：2009-07-02

申请人： Carl Scarpa

发明人： Carl Scarpa

IPC分类号： H04B7/185

CPC分类号： H04L27/22 ,  H04B1/1027 ,  H04L27/3466

摘要： Degree of hierarchical modulation can be varied as a function of satellite position, where such hierarchical modulation can be a combination of phase and amplitude shifts. As each satellite in a multiple satellite system moves towards a D-node or an A-node position, the offset angle of a phase-based hierarchical modulation scheme can be varied. Starting with the lowest satellite position in the sky an offset angle for overlay bits can progressively increase as the position of the satellite in the sky increases. At a satellite's highest point in the sky, the overlay offset angle can be at its maximum. The value of a varying overlay offset angle (for each satellite) can be embedded in an Overlay Identification Marker (OIM) in the broadcast. The receiver can then appropriately correct MRC weightings (weighting more heavily the (higher lying) satellite).

公开(公告)号：US20130039442A1

公开(公告)日：2013-02-14

申请号：US13575112

申请日：2011-01-25

申请人： Joseph Smallcomb ,  Paul Krayeski

发明人： Joseph Smallcomb ,  Paul Krayeski

IPC分类号： H04L27/20 ,  H04J3/06

CPC分类号： H04L27/3483 ,  H04L1/0042 ,  H04L1/005 ,  H04L1/007 ,  H04L25/0224 ,  H04L27/183 ,  H04L27/2067 ,  H04L27/2604 ,  H04L27/2627 ,  H04L27/2649 ,  H04L27/3466 ,  H04L27/3488

摘要： A method is provided for enhancing a legacy satellite digital radio audio service (SDARS) by overlaying a hierarchically modulated data stream on a base layer (legacy) data stream and improving the synchronization of the received signal in which an overlay layer frame is synchronized to a base layer frame. The base layer frame includes additional data that is used to synchronize the receivers to demodulate and decode the overlay layer and the base layer. The additional data is modulated using a technique that aids the receiver in synchronizing the received signal that is different from the overlay layer.

摘要翻译： 提供了一种通过在基本层（传统）数据流上叠加分层调制的数据流来增强传统卫星数字无线电音频服务（SDARS）的方法，并且改善了覆盖层帧与其同步的接收信号的同步 基层框架。 基层帧包括用于同步接收机以解调和解码覆盖层和基本层的附加数据。 使用辅助接收机同步与覆盖层不同的接收信号的技术对附加数据进行调制。

公开(公告)号：US07656966B2

公开(公告)日：2010-02-02

申请号：US11789600

申请日：2007-04-25

申请人： Glenn A. Walker ,  Eric A. Dibiaso ,  Michael L. Hiatt, Jr.

发明人： Glenn A. Walker ,  Eric A. Dibiaso ,  Michael L. Hiatt, Jr.

IPC分类号： H04L27/20

CPC分类号： H04L27/3466 ,  H04B7/18513 ,  H04L27/3488

摘要： This invention provides a receiver for use in a SDAR system which includes a receiving unit having satellite signal detection means for detecting a first transmit signal transmitted from a first communication satellite and a second transmit signal transmitted from a second communication satellite, the first transmit signal produced when the transmitter modulates a primary data stream with a secondary data stream on a first carrier wave associated with the first communication satellite and the second transmit signal produced when the transmitter modulates the primary and secondary data streams on a second carrier wave associated with the second communication satellite, and an encoder re-encodes the primary and the secondary data on a third carrier wave, forming a third transmit signal which is re-transmitted to a receiver using a terrestrial repeater. This invention also provides a method of receiving transmitted data.

摘要翻译： 本发明提供了一种在SDAR系统中使用的接收机，其包括具有卫星信号检测装置的接收单元，用于检测从第一通信卫星发射的第一发射信号和从第二通信卫星发射的第二发射信号，产生第一发射信号 当所述发射机在与所述第一通信卫星相关联的第一载波上用辅助数据流调制主要数据流时，以及当所述发射机在与所述第二通信相关联的第二载波上调制所述主要和次要数据流时产生的所述第二发射信号 卫星，并且编码器对第三载波上的主要和次要数据进行重新编码，形成第三发射信号，该第三发射信号使用陆地中继器再传送到接收机。 本发明还提供一种接收传输数据的方法。