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公开(公告)号：US12028439B2
公开(公告)日：2024-07-02
申请号：US17959621
申请日：2022-10-04
Applicant: Sirius XM Radio Inc.
Inventor： Carl Scarpa , Edward Schell
CPC classification number: H04L7/0331
Abstract: Systems and methods for maintaining synchronization of repeater networks with Global Positioning System (GPS) signals using phase locked loops (PLLs) and based on generation of predicted control words for controlling local oscillator frequencies is described. The predicted control words can be generated based on performing a linear fit of control words generated over a predetermined duration of time. Phase locked loops with additional false GPS pulse identification and GPS signal loss compensation circuitry can enforce a false pulse count threshold and/or an error threshold. The additional circuitry and prediction of control words can overcome errors in GPS receiver outputs and maintain accuracy of signal timings across single frequency networks using inexpensive local oscillators.
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公开(公告)号：US20230053016A1
公开(公告)日：2023-02-16
申请号：US17746436
申请日：2022-05-17
Applicant: Sirius XM Radio Inc.
Inventor： Edward Schell , Carl Scarpa
Abstract: Systems and methods for a non-data-aided (NDA) approach to advanced OFDM timing are provided. This approach allows for accurate OFDM symbol timing and synchronization by avoiding inter-symbol interference (ISI) in multipath environments where an earliest arriving signal may not be the strongest signal. The NDA approach may rely on generating and applying a bias correction to a combined correlation result of the multi-path signals.
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公开(公告)号：US08983364B2
公开(公告)日：2015-03-17
申请号：US14103146
申请日：2013-12-11
Applicant: Sirius XM Radio Inc.
Inventor： Carl Scarpa , Edward Schell
CPC classification number: H04B7/18513
Abstract: Methods and apparatus are presented to allow one receiver architecture to be used for the reception of two different SDARS signals. Common receiver functions can be utilized to process each signal, thereby obviating the need to duplicate hardware elements. For example, it can be assumed that both signals will not be received at the same time, thus allowing for considerable hardware reuse and lowering the cost of an interoperable receiver.
Abstract translation: 提出了方法和装置，以允许一个接收器架构用于接收两个不同的SDARS信号。 可以使用公共接收机功能来处理每个信号，从而避免复制硬件元件的需要。 例如，可以假设两个信号不会同时被接收，从而允许相当大的硬件重用并降低可互操作的接收机的成本。
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公开(公告)号：US11463234B2
公开(公告)日：2022-10-04
申请号：US17157083
申请日：2021-01-25
Applicant: Sirius XM Radio Inc.
Inventor： Carl Scarpa , Edward Schell
Abstract: Systems and methods for maintaining synchronization of repeater networks with Global Positioning System (GPS) signals using phase locked loops (PLLs) and based on generation of predicted control words for controlling local oscillator frequencies is described. The predicted control words can be generated based on performing a linear fit of control words generated over a predetermined duration of time. Phase locked loops with additional false GPS pulse identification and GPS signal loss compensation circuitry can enforce a false pulse count threshold and/or an error threshold. The additional circuitry and prediction of control words can overcome errors in GPS receiver outputs and maintain accuracy of signal timings across single frequency networks using inexpensive local oscillators.
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公开(公告)号：US20220006609A1
公开(公告)日：2022-01-06
申请号：US17157083
申请日：2021-01-25
Applicant: Sirius XM Radio Inc.
Inventor： Carl Scarpa , Edward Schell
IPC: H04L7/033
Abstract: Systems and methods for maintaining synchronization of repeater networks with Global Positioning System (GPS) signals using phase locked loops (PLLs) and based on generation of predicted control words for controlling local oscillator frequencies is described. The predicted control words can be generated based on performing a linear fit of control words generated over a predetermined duration of time. Phase locked loops with additional false GPS pulse identification and GPS signal loss compensation circuitry can enforce a false pulse count threshold and/or an error threshold. The additional circuitry and prediction of control words can overcome errors in GPS receiver outputs and maintain accuracy of signal timings across single frequency networks using inexpensive local oscillators.
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Patent Agency Ranking
公开(公告)号：US20210281461A1
公开(公告)日：2021-09-09
申请号：US17075046
申请日：2020-10-20
Applicant: Sirius XM Radio Inc.
Inventor： Edward Schell , Carl Scarpa
Abstract: Systems and methods for a non-data-aided (NDA) approach to advanced OFDM timing are provided. This approach allows for accurate OFDM symbol timing and synchronization by avoiding inter-symbol interference (ISI) in multipath environments where an earliest arriving signal may not be the strongest signal. The NDA approach may rely on generating and applying a bias correction to a combined correlation result of the multi-path signals.
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公开(公告)号：US11108460B2
公开(公告)日：2021-08-31
申请号：US16168285
申请日：2018-10-23
Applicant: Sirius XM Radio, Inc.
Inventor： Edward Schell , Carl Scarpa , John Goslin
Abstract: Systems, algorithms and methods for reclaiming unused portions of a satellite broadcast service's bandwidth for new services, utilizing higher performance coding techniques to yield better throughput, are presented. These systems, algorithms and methods achieve the reclaimed bandwidth in a way that is invisible to a legacy receiver, and that does not interfere with its reception of a legacy signal. In one embodiment, new data may be transmitted within a legacy transmission frame, for example within its cluster structure, using the same modulation and synchronization as used for the legacy data. The new data may be inserted into a channel or other subdivision at a head end. In another embodiment, one or more clusters or subdivisions with only new data may be transmitted, using the same modulation and synchronization as the legacy data clusters, but now employing a higher performing FEC and data interleaving structure on those clusters which contain only new data to yield an increase in available throughput. Finally, in a third embodiment, one or more clusters containing only new data may be transmitted, and in said one or more all new data clusters, different modulation and synchronization may be used then that of the legacy data clusters, thus employing a higher performing FEC and data interleaving structure than that of the legacy clusters. Various combinations of these approaches are also presented, as well as a set of novel receivers, or receiver configurations, to implement them and their combinations.
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公开(公告)号：US20210119847A1
公开(公告)日：2021-04-22
申请号：US16655822
申请日：2019-10-17
Applicant: Sirius XM Radio Inc.
Inventor： Edward Schell , Carl Scarpa
Abstract: Systems and methods for enabling pre-compensation of timing offsets in OFDM receivers without invalidating channel estimates are described. Timing offset estimations may be sent along with the received OFDM symbols for FFT computation and generating a de-rotated signal output. The timing offset estimation may provide a reference point for dynamic tracking of timing for an OFDM signal and estimated based on an integral value associated with the OFDM signal.
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公开(公告)号：US20200052875A1
公开(公告)日：2020-02-13
申请号：US16521880
申请日：2019-07-25
Applicant: Sirius XM Radio Inc.
Inventor： Carl Scarpa , Edward Schell
IPC: H04L7/033
Abstract: Systems and methods for maintaining synchronization of repeater networks with Global Positioning System (GPS) signals using phase locked loops (PLLs) and based on generation of predicted control words for controlling local oscillator frequencies is described. The predicted control words can be generated based on performing a linear fit of control words generated over a predetermined duration of time. Phase locked loops with additional false GPS pulse identification and GPS signal loss compensation circuitry can enforce a false pulse count threshold and/or an error threshold. The additional circuitry and prediction of control words can overcome errors in GPS receiver outputs and maintain accuracy of signal timings across single frequency networks using inexpensive local oscillators.
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公开(公告)号：US10110296B2
公开(公告)日：2018-10-23
申请号：US14845080
申请日：2015-09-03
Applicant: Sirius XM Radio Inc.
Inventor： Edward Schell , Carl Scarpa , John Goslin
Abstract: Systems, algorithms and methods for reclaiming unused portions of a satellite broadcast service's bandwidth for new services, utilizing higher performance coding techniques to yield better throughput, are presented. Reclamation of bandwidth can be achieved in a way that is invisible to a legacy receiver, and that does not interfere with its reception of a legacy signal. New data may be transmitted within a legacy transmission frame, for example within its cluster structure, using the same modulation and synchronization as used for the legacy data. In other embodiments, one or more clusters or subdivisions with only new data may be transmitted, using the same or different modulation and synchronization as the legacy data clusters, but now employing a higher performing FEC and data interleaving structure on those clusters which contain only new data to yield an increase in available throughput.
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