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1.发明申请Receiver system and method for switching among a plurality of antenna elements to receive a signal 有权用于在多个天线元件之间切换以接收信号的接收机系统和方法公开(公告)号：US20090075617A1
公开(公告)日：2009-03-19
申请号：US11901893
申请日：2007-09-19
IPC分类号： H04B1/06
CPC分类号： H04B7/0814 , H04B7/0808
摘要： A receiver system and method for switching among a plurality of antenna elements to receive a signal. At least a portion of plurality of antenna elements receive a transmitted signal, such that the transmitted signal includes a plurality of sub-channels that are transmitted in predetermined time intervals. A switching device is in communication with the plurality of antenna elements, and switches among single antenna elements to receive the transmitted signal. A controller is in communication with the switching device, and commands the switching device to select each of the antenna elements separately in predetermined periods of time based upon the predetermined time intervals of each of the sub-channels. A power level of the transmitted signal is determined during the predetermined period of time that corresponds to the predetermined time intervals, and the controller commands the switching device to switch to an antenna element based upon the determined power level.
摘要翻译： 一种用于在多个天线元件之间切换以接收信号的接收机系统和方法。 多个天线元件的至少一部分接收发送信号，使得所发送的信号包括以预定时间间隔发送的多个子信道。 开关装置与多个天线元件通信，并且在单个天线元件之间切换以接收所发送的信号。 控制器与开关装置通信，并且命令开关装置基于每个子通道的预定时间间隔在预定时间段内分别选择每个天线元件。 在对应于预定时间间隔的预定时段期间确定发送信号的功率电平，并且控制器基于所确定的功率电平命令切换装置切换到天线元件。
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2.发明授权Receiver system and method for switching among a plurality of antenna elements to receive a signal 有权用于在多个天线元件之间切换以接收信号的接收机系统和方法公开(公告)号：US07957333B2
公开(公告)日：2011-06-07
申请号：US11901893
申请日：2007-09-19
IPC分类号： H04W4/00
CPC分类号： H04B7/0814 , H04B7/0808
摘要： A receiver system and method for switching among a plurality of antenna elements to receive a signal. At least a portion of plurality of antenna elements receive a transmitted signal, such that the transmitted signal includes a plurality of sub-channels that are transmitted in predetermined time intervals. A switching device is in communication with the plurality of antenna elements, and switches among single antenna elements to receive the transmitted signal. A controller is in communication with the switching device, and commands the switching device to select each of the antenna elements separately in predetermined periods of time based upon the predetermined time intervals of each of the sub-channels. A power level of the transmitted signal is determined during the predetermined period of time that corresponds to the predetermined time intervals, and the controller commands the switching device to switch to an antenna element based upon the determined power level.
摘要翻译： 一种用于在多个天线元件之间切换以接收信号的接收机系统和方法。 多个天线元件的至少一部分接收发送信号，使得所发送的信号包括以预定时间间隔发送的多个子信道。 开关装置与多个天线元件通信，并且在单个天线元件之间切换以接收所发送的信号。 控制器与开关装置通信，并且命令开关装置基于每个子通道的预定时间间隔在预定时间段内分别选择每个天线元件。 在对应于预定时间间隔的预定时段期间确定发送信号的功率电平，并且控制器基于所确定的功率电平命令切换装置切换到天线元件。
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3.发明授权Method to increase performance of secondary data in a hierarchical modulation scheme 有权提高分层调制方案中二次数据性能的方法公开(公告)号：US07386056B2
公开(公告)日：2008-06-10
申请号：US10995721
申请日：2004-11-22
CPC分类号： H04L27/183 , H04B7/18513 , H04B7/18523 , H04L1/005 , H04L1/0066 , H04L27/2604 , H04L27/2626 , H04L27/2647 , 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 transmit signal transmitted from a satellite, the transmit signal produced when the transmitter modulates a primary data stream with a secondary data stream on a carrier wave associated with the satellite; and at least one demodulator coupled to the receiving unit and configured to demodulate the transmit signal.
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，用于检测从卫星发射的发射信号，当发射机利用辅助数据调制主数据流时产生的发射信号 与卫星相关的载波上的流; 以及至少一个解调器，其耦合到所述接收单元并且被配置为对所述发射信号进行解调。
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公开(公告)号：US07230992B2
公开(公告)日：2007-06-12
申请号：US10995946
申请日：2004-11-22
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。
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5.发明授权Method to minimize compatibility error in hierarchical modulation using variable phase 有权使用可变相分级调制最小化兼容性错误的方法公开(公告)号：US07751497B2
公开(公告)日：2010-07-06
申请号：US11474735
申请日：2006-06-26
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。
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公开(公告)号：US07499696B2
公开(公告)日：2009-03-03
申请号：US10995013
申请日：2004-11-22
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。
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公开(公告)号：US07280613B2
公开(公告)日：2007-10-09
申请号：US10946678
申请日：2004-09-22
IPC分类号： H04L27/20
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。
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8.发明授权Method to increase performance of secondary data in a hierarchical modulation scheme 有权提高分层调制方案中二次数据性能的方法公开(公告)号：US07230998B2
公开(公告)日：2007-06-12
申请号：US10847944
申请日：2004-05-18
IPC分类号： 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。
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公开(公告)号：US07822149B2
公开(公告)日：2010-10-26
申请号：US11143044
申请日：2005-06-02
IPC分类号： H04L27/20
CPC分类号： H04L27/183 , H04H20/30 , H04H20/67 , H04L27/2604
摘要： Additional data may be added to the current SDARS satellite signals as a phase and/or amplitude offset from the legacy quadrature phase shift keying (QPSK) modulated data and transmitted by the SDAR terrestrial repeaters. However, in the case where a legacy receiver architecture for a differential modulation system outputs angular/phase differences between carriers, the phase and/or amplitude information appears as distortion to the legacy receiver. The present invention provides a method for optimizing the SDARS infrastructure more efficiently by allowing independent adjustment of the phase and/or amplitude offset (610) at each terrestrial site. The present invention provides a method for adjusting the performance of each signal together or separately as needed.
摘要翻译： 附加数据可以作为与传统正交相移键控（QPSK）调制数据的相位和/或幅度偏移并由SDAR地面转发器发送的当前SDARS卫星信号相加。 然而，在用于差分调制系统的传统接收器架构输出载波之间的角度/相位差的情况下，相位和/或幅度信息表现为传统接收机的失真。 本发明提供了一种通过允许对每个地面站点处的相位和/或幅度偏移（610）进行独立调整来更有效地优化SDARS基础设施的方法。 本发明提供一种根据需要一起或分开地调整每个信号的性能的方法。
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10.发明授权公开(公告)号：US07773697B2
公开(公告)日：2010-08-10
申请号：US11088129
申请日：2005-03-23
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。
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