公开(公告)号：US20060198452A1

公开(公告)日：2006-09-07

申请号：US11069254

申请日：2005-03-01

申请人： Eric Dibiaso ,  Glenn Walker ,  Michael Hiatt

发明人： Eric Dibiaso ,  Glenn Walker ,  Michael Hiatt

IPC分类号： H04K1/10 ,  H04L27/20

CPC分类号： H04L27/183 ,  H04L27/2078 ,  H04L27/2601 ,  H04L27/3488

摘要： The present invention provides a method to minimize degradation in a D-MPSK hierarchical modulation system by adding additional data throughput (i.e., secondary information) as an offset to the primary signal transmitted by a SDARS terrestrial repeater. The present invention provides techniques for adding the additional throughput as Level 2 data by transmitting offset phase and/or amplitude information across adjacent OFDM symbols and/or adjacent frequency subcarriers.

摘要翻译： 本发明提供了一种通过将额外的数据吞吐量（即次要信息）作为偏移量附加到由SDARS地面中继器发射的主信号来最小化D-MPSK分级调制系统的劣化的方法。 本发明提供了用于通过在相邻OFDM符号和/或相邻频率子载波之间传输偏移相位和/或幅度信息来将附加吞吐量添加为级别2数据的技术。

公开(公告)号：US20050111581A1

公开(公告)日：2005-05-26

申请号：US10946678

申请日：2004-09-22

申请人： Glenn Walker ,  Eric Dibiaso ,  Michael Hiatt

发明人： Glenn Walker ,  Eric Dibiaso ,  Michael Hiatt

IPC分类号： H04B7/185 ,  H04L27/18 ,  H04L27/34 ,  H04L5/12

CPC分类号： H04L27/3488 ,  H04B7/18513 ,  H04L27/183

摘要： The present invention involves a transmitter for transmitting two levels of data in a hierarchical transmission system. The transmitter has encoders, a modulator, an adjuster, and an up converter. The first encoder has a first output and capable of providing digital information based on a first level of data on the first output. The second encoder has a second output and is capable of providing digital information based on a second level of data on the second output. The modulator is coupled to the first encoder and has I and Q outputs. The adjuster is coupled to the modulator and second encoder and modifies signals on the I and Q outputs of the modulator to produce transmission I and transmission Q outputs. The up converter is coupled to the adjuster and is capable of transmitting broadcast radio signals based on the transmission I and transmission Q outputs. The modulator may include a root raised cosine filter and/or a QPSK modulator. The I and Q outputs of the modulator include analog I and analog Q signals. The adjuster includes an inverter, a phase rotator circuit, a combiner, and/or a limiter. The transmission I and transmission Q outputs of the adjuster include analog I and analog Q signals.

摘要翻译： 本发明涉及一种用于在分层传输系统中发送两级数据的发射机。 发射机具有编码器，调制器，调节器和升压转换器。 第一编码器具有第一输出并且能够基于第一输出上的第一级数据提供数字信息。 第二编码器具有第二输出，并且能够基于第二输出上的第二级数据提供数字信息。 调制器耦合到第一编码器并具有I和Q输出。 调节器耦合到调制器和第二编码器，并修改调制器的I和Q输出端的信号以产生传输I和传输Q输出。 上变频器耦合到调节器，并且能够基于发送I和发送Q输出来发送广播无线电信号。 调制器可以包括根升余弦滤波器和/或QPSK调制器。 调制器的I和Q输出包括模拟I和模拟Q信号。 调节器包括逆变器，相位旋转器电路，组合器和/或限幅器。 调整器的发送I和发送Q输出包括模拟I和模拟Q信号。

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：US20050143004A1

公开(公告)日：2005-06-30

申请号：US10995013

申请日：2004-11-22

申请人： Eric Dibiaso ,  Michael Hiatt ,  Glenn Walker

发明人： Eric Dibiaso ,  Michael Hiatt ,  Glenn Walker

IPC分类号： H04B7/185 ,  H04L27/18 ,  H04L27/34 ,  H04Q7/20

CPC分类号： H04B7/18523 ,  H04B7/18513 ,  H04L27/183 ,  H04L27/3488

摘要： The present invention involves a method for transmitting data having primary and secondary data. A first transmit signal is transmitted from a first communication satellite wherein the first transmit signal is produced when the transmitter modulates the primary and secondary data on a first carrier wave associated with the first communication satellite, with secondary data having a first polarity. A second transmit signal is transmitted from a second communication satellite wherein said second transmit signal is produced when the transmitter modulates the primary and secondary data on a second carrier wave associated with the second communication satellite with secondary data having a second polarity opposite the first polarity.

摘要翻译： 本发明涉及用于发送具有主要和次要数据的数据的方法。 从第一通信卫星发送第一发射信号，其中当发射机在与第一通信卫星相关联的第一载波上调制主要和次要数据时产生第一发射信号，次要数据具有第一极性。 从第二通信卫星发送第二发射信号，其中当发射机在与第二通信卫星相关联的第二载波上调制主要和次要数据时，产生所述第二发射信号，其次要数据具有与第一极性相反的第二极性。

公开(公告)号：US20050141627A1

公开(公告)日：2005-06-30

申请号：US10995946

申请日：2004-11-22

申请人： Glenn Walker ,  Eric Dibiaso ,  Michael Hiatt

发明人： Glenn Walker ,  Eric Dibiaso ,  Michael Hiatt

IPC分类号： H04H1/00 ,  H04H20/28 ,  H04H20/42 ,  H04H20/51 ,  H04H20/74 ,  H04H40/90 ,  H04L1/00 ,  H04L5/16 ,  H04L27/18 ,  H04L27/26 ,  H04L27/34

CPC分类号： H04L1/005 ,  H04H20/28 ,  H04H20/42 ,  H04H20/51 ,  H04H20/74 ,  H04H40/90 ,  H04L1/0066 ,  H04L1/0071 ,  H04L1/208 ,  H04L27/183 ,  H04L27/2602 ,  H04L27/2626 ,  H04L27/2647 ,  H04L27/3488

摘要： The present invention involves a method for transmitting data using an orthogonal frequency division multiplex (OFDM) transmission system, such as over a terrestrial network used in satellite digital audio radio. A OFDM signal is generated based on first input data. A variation is introduced in the OFDM signal based on second input data to generate a modified OFDM signal which is transmitted. The modified OFDM signal is decoded by performing a demodulation of the modified OFDM signal then a first and second detection to obtain the first input data and the second input data. The introduction of a variance may include introducing an additional phase offset across adjacent OFDM sub-carriers, across adjacent OFDM symbols, an additional phase offset in the OFDM signal, an additional amplitude offset in the OFDM signal, an additional amplitude augmentation in the OFDM signal, and/or a second variation in the first OFDM signal based on third input data.

摘要翻译： 本发明涉及一种使用正交频分多路复用（OFDM）传输系统来发送数据的方法，例如通过卫星数字音频无线电中使用的地面网络。 基于第一输入数据生成OFDM信号。 基于第二输入数据在OFDM信号中引入变化以产生被发送的经修改的OFDM信号。 通过对经修改的OFDM信号进行解调，然后对第一和第二检测进行解调，以获得第一输入数据和第二输入数据，对经修改的OFDM信号进行解码。 引入方差可以包括在相邻OFDM符号之间跨越相邻OFDM子载波引入附加相位偏移，OFDM信号中的附加相位偏移，OFDM信号中的附加振幅偏移，OFDM信号中的附加幅度增大 ，和/或基于第三输入数据的第一OFDM信号中的第二变型。

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：US20060215790A1

公开(公告)日：2006-09-28

申请号：US11088129

申请日：2005-03-23

申请人： Eric Dibiaso ,  Michael Hiatt ,  Glenn Walker

发明人： Eric Dibiaso ,  Michael Hiatt ,  Glenn Walker

IPC分类号： H04L27/22

CPC分类号： H04L27/3488 ,  H04L27/2647 ,  H04L27/38

摘要： Where the additional data throughput is added using an amplitude offset or a combination of phase and amplitude offset, the legacy differential demodulator does not recover the amplitude information. The present invention provides a method for demodulating amplitude offsets in a differential modulation system in order to recover the amplitude information. The demodulated amplitude information may be used to recover the additional Level 2 data transmitted as an amplitude offset or combination phase and amplitude offset in a differential multiple phase shift keying (D-MPSK) transmission, such as across adjacent OFDM symbols and/or adjacent frequency subcarriers.

摘要翻译： 在使用幅度偏移或相位和幅度偏移的组合来附加附加数据吞吐量的情况下，传统差分解调器不恢复幅度信息。 本发明提供了一种用于解调差分调制系统中的幅度偏移的方法，以便恢复振幅信息。 解调的幅度信息可以用于恢复在差分多相移键控（D-MPSK）传输（例如跨越相邻OFDM符号和/或相邻频率）的幅度偏移或组合相位和幅度偏移量上传输的附加级别2数据 副载波。

公开(公告)号：US20060045140A1

公开(公告)日：2006-03-02

申请号：US10931665

申请日：2004-09-01

申请人： Glenn Walker ,  Eric Dibiaso ,  Michael Hiatt

发明人： Glenn Walker ,  Eric Dibiaso ,  Michael Hiatt

IPC分类号： H04L12/28 ,  H04J3/04

CPC分类号： H04L27/3488 ,  H04H20/51 ,  H04H40/90 ,  H04H60/11 ,  H04L1/0083 ,  H04L2001/0098

摘要： The present invention generally relates to the transmission of digital data, and more particularly, to the transmission of digital data in a satellite digital audio radio (“SDAR”) system. In the SDAR system, there may be different types of required services. Some of these services may be considered high priority and others may be of a lower priority. Current SDAR systems have the same performance on all user data. Therefore, there is a need to vary the performance of different services. The present invention provides a method and apparatus for optimizing the throughput (i.e. information) in a digital transmission system by transmitting the different services with different performance levels. The present invention addresses the need in the art to vary the performance of different services (i.e., levels of data). Because the performance of the primary level of data will not be equal to the performance of the secondary level of data, the primary level will need to be further protected. The primary level data may be streaming data. The secondary level data does not need as much protection because it may be rebroadcast repeatedly. The easiest and most cost effective solution is to integrate multiple symbols for a secondary level bit. The present invention provides a method and apparatus in which the power level for the data levels can be set within each data packet using a message header providing the different services with different levels of performance.

公开(公告)号：US20070054614A1

公开(公告)日：2007-03-08

申请号：US11474735

申请日：2006-06-26

申请人： Glenn Walker ,  Eric Dibiaso ,  Michael Hiatt

发明人： Glenn Walker ,  Eric Dibiaso ,  Michael Hiatt

IPC分类号： H04B7/185 ,  H04H1/00

CPC分类号： H04B7/18513 ,  H04L27/183 ,  H04L27/3488

摘要： The present invention provides a method, receiver and transmitter for use in a SDAR system. The method involves generating a first modulated signal based on first input data. Additional modulation is superimposed on the first modulated signal based on additional input data, being spread across a plurality of symbols in the first modulated signal in a predetermined pattern to generate a modified signal which is then transmitted. The modified signal is decoded by performing a first demodulation of the first modulated signal then additional demodulation is performed to obtain additional input data. The superimposing step uses a plurality of offset sequence values to add the additional modulation to the first modulated signal. The offset sequence may appear as a pseudo-random distribution of offset sequence values, and may include at least one zero offset value. Alternatively, the additional modulated signal may be a formed as a direct sequence spread spectrum modulation and the offset sequence appearing as a pseudo-noise distribution. A Hadamard matrix sequence may be used as the direct sequence code.

摘要翻译： 本发明提供一种用于SDAR系统的方法，接收机和发射机。 该方法包括基于第一输入数据产生第一调制信号。 基于额外的输入数据将附加调制叠加在第一调制信号上，以预定模式扩展到第一调制信号中的多个符号，以产生随后发送的经修改的信号。 通过执行第一调制信号的第一解调来解码修改的信号，然后执行附加解调以获得附加的输入数据。 叠加步骤使用多个偏移序列值将附加调制附加到第一调制信号。 偏移序列可以显示为偏移序列值的伪随机分布，并且可以包括至少一个零偏移值。 或者，附加调制信号可以形成为直接序列扩频调制，并且出现作为伪噪声分布的偏移序列。 可以使用Hadamard矩阵序列作为直接序列码。

公开(公告)号：US20060193407A1

公开(公告)日：2006-08-31

申请号：US11068416

申请日：2005-02-28

申请人： Eric Dibiaso ,  Michael Hiatt ,  Glenn Walker

发明人： Eric Dibiaso ,  Michael Hiatt ,  Glenn Walker

IPC分类号： H04L27/06

CPC分类号： H04L27/2273 ,  H04L2027/0057 ,  H04L2027/0067 ,  H04L2027/0095

摘要： A method for performing demodulation of a phase shift key carrier signal includes receiving a data stream extracted from the carrier signal, the data stream having a preamble, and detecting the presence of the preamble. A phase/frequency correction is provided if the preamble is detected.

摘要翻译： 用于执行相移键密钥载波信号的解调的方法包括：接收从载波信号提取的数据流，所述数据流具有前同步码，并检测所述前同步码的存在。 如果检测到前置码，则提供相位/频率校正。