公开(公告)号：US12088398B1

公开(公告)日：2024-09-10

申请号：US17186627

申请日：2021-02-26

Applicant: Space Exploration Technologies Corp.

Inventor： Martin S. McCormick ,  Torbjorn Larsson ,  Alazar Tamrat ,  Jeffrey C. Strait ,  Chen Chen ,  Philip J. Treigherman ,  Stephan O. Roche ,  Ronald Gottula

IPC: H04B7/185 ,  H04L5/00 ,  H04L25/02 ,  H04L27/00 ,  H04L27/26

CPC classification number: H04B7/18513 ,  H04B7/18517 ,  H04L5/001 ,  H04L25/0202 ,  H04L27/0014 ,  H04L27/2636 ,  H04L2027/0026

Abstract: A modem is configurable on a satellite, user terminal or gateway generates a radio frequency (RF) signal using an orthogonal frequency division multiplexing (OFDM) protocol including a radio frame including one or more bursts. A burst of the one or more bursts includes a first portion including burst detection data, a second portion including channel characteristic estimation data, a third portion including payload data, and fourth and fifth portions including pilot data. The first portion in a time domain is included in the burst prior to the second, third, fourth, and fifth portions. The first portion can include a pseudo-random noise sequence inserted in the time domain. The same physical modem can be configured to transmit signals on an uplink or downlink between a user terminal and a satellite or on the uplink or downlink between the satellite and the gateway.

公开(公告)号：US12074683B1

公开(公告)日：2024-08-27

申请号：US17186706

申请日：2021-02-26

Applicant: Space Exploration Technologies Corp.

Inventor： Martin S. McCormick ,  Torbjorn Larsson ,  Alazar Tamrat ,  Jeffrey C. Strait ,  Chen Chen ,  Philip J. Treigherman ,  Stephan O. Roche ,  Ronald Gottula

IPC: H04B7/185 ,  H04L5/00 ,  H04W72/0453

CPC classification number: H04B7/18513 ,  H04L5/0048 ,  H04W72/0453

Abstract: A modem is configurable on a satellite, user terminal or gateway generates a radio frequency (RF) signal using an orthogonal frequency division multiplexing (OFDM) protocol including a radio frame including one or more bursts. A burst of the one or more bursts includes a first portion including burst detection data, a second portion including channel characteristic estimation data, a third portion including payload data, and fourth and fifth portions including pilot data. The first portion in a time domain is included in the burst prior to the second, third, fourth, and fifth portions. The first portion can include a pseudo-random noise sequence inserted in the time domain. The same physical modem can be configured to transmit signals on an uplink or downlink between a user terminal and a satellite or on the uplink or downlink between the satellite and the gateway.

公开(公告)号：US12003350B1

公开(公告)日：2024-06-04

申请号：US17186657

申请日：2021-02-26

Applicant: Space Exploration Technologies Corp.

Inventor： Martin S. McCormick ,  Torbjorn Larsson ,  Alazar Tamrat ,  Jeffrey C. Strait ,  Chen Chen ,  Philip J. Treigherman ,  Stephan O. Roche ,  Ronald Gottula

IPC: H04L25/02 ,  H04B7/185 ,  H04L5/00 ,  H04W72/044

CPC classification number: H04L25/0202 ,  H04B7/1851 ,  H04L5/0048 ,  H04W72/044

Abstract: A modem is configurable on a satellite, user terminal or gateway generates a radio frequency (RF) signal using an orthogonal frequency division multiplexing (OFDM) protocol including a radio frame including one or more bursts. A burst of the one or more bursts includes a first portion including burst detection data, a second portion including channel characteristic estimation data, a third portion including payload data, and fourth and fifth portions including pilot data. The first portion in a time domain is included in the burst prior to the second, third, fourth, and fifth portions. The first portion can include a pseudo-random noise sequence inserted in the time domain. The same physical modem can be configured to transmit signals on an uplink or downlink between a user terminal and a satellite or on the uplink or downlink between the satellite and the gateway.

公开(公告)号：US20250062935A1

公开(公告)日：2025-02-20

申请号：US18815754

申请日：2024-08-26

Applicant: Space Exploration Technologies Corp.

Inventor： Martin S. McCormick ,  Torbjorn Larsson ,  Alazar Tamrat ,  Jeffrey C. Strait ,  Chen Chen ,  Philip J. Treigherman ,  Stephan O. Roche ,  Ronald Gottula

IPC: H04L25/02 ,  H04B7/185 ,  H04L5/00 ,  H04L27/00 ,  H04L27/26 ,  H04W72/044 ,  H04W72/0453

Abstract: A modem is configured to receive a transmitted waveform transmitted from a satellite (SAT) to a user terminal (UT). The modem includes: a receiver, on the UT, configured to receive the transmitted waveform from the SAT, the transmitted waveform comprising first resource blocks intended for the UT and second resource blocks intended for a second UT, a first set of components configured with the receiver on the UT to process the transmitted waveform with the first resource blocks and the second resource blocks, a multi-user demapper configured with the receiver to extract the first resource blocks from the transmitted waveform to yield a per-user signal, and a second set of components configured within the receiver to demodulate and decode the first resource blocks in the per-user signal.

公开(公告)号：US12244396B1

公开(公告)日：2025-03-04

申请号：US17186579

申请日：2021-02-26

Applicant: Space Exploration Technologies Corp.

Inventor： Martin S. McCormick ,  Torbjorn Larsson ,  Alazar Tamrat ,  Jeffrey C. Strait ,  Chen Chen ,  Philip J. Treigherman ,  Stephan O. Roche ,  Ronald Gottula

IPC: H04B7/185 ,  H04L5/00 ,  H04W72/0453

Abstract: A modem is configurable on a satellite, user terminal or gateway generates a radio frequency (RF) signal using an orthogonal frequency division multiplexing (OFDM) protocol including a radio frame including one or more bursts. A burst of the one or more bursts includes a first portion including burst detection data, a second portion including channel characteristic estimation data, a third portion including payload data, and fourth and fifth portions including pilot data. The first portion in a time domain is included in the burst prior to the second, third, fourth, and fifth portions. The first portion can include a pseudo-random noise sequence inserted in the time domain. The same physical modem can be configured to transmit signals on an uplink or downlink between a user terminal and a satellite or on the uplink or downlink between the satellite and the gateway.