Communications bandwidth enhancement using orthogonal spatial division multiplexing
First Claim
1. A system for generating orthogonal frequency division multiplexing (OSDM) reuse signals, the system comprising:
- a first beamforming assembly comprising;
a first signal source configured to provide a first signal;
a first low noise amplifier communicatively coupled with the first signal source and configured to amplify the first signal;
a first power divider communicatively coupled with the first low noise amplifier; and
a first beamformer;
a second beamforming assembly comprising;
a second signal source configured to provide a second signal;
a second low noise amplifier communicatively coupled with the second signal source and configured to amplify the second signal;
a second power divider communicatively coupled with the second low noise amplifier; and
a second beamformer;
wherein the first and second power dividers are each communicatively coupled with the first and second beamformer, and wherein the first power divider is configured to divide the amplified first signal into a first beamformer component for sending to the first beamformer and a second beamformer component for sending to the second beamformer, and the second power divider is configured to divide the amplified second signal into a first beamformer component for sending to the first beamformer and a second beamformer component for sending to the second beamformer; and
wherein the first beamformer includes program means for combining, based on a total array size of the first beamforming assembly and the second beamforming assembly, the received first beamformer components of the first signal and second signal into a first combined signal, and the second beamformer includes program means for combining, based on the first distance, the received second beamformer components of the first signal and second signal into a second combined signal, the first and second combined signals having one or more of a shared frequency, a shared signal polarization, and a shared coverage area, the first and second combined signals formed such that, when the combined signal is received, an additive array factor is provided resulting in a peak in one of the first signal and the second signal and a null on the other of the first signal and second signal.
5 Assignments
0 Petitions
Accused Products
Abstract
Systems and methods are described herein for communications bandwidth enhancement using Orthogonal Spatial Division Multiplexing (OSDM). For example, large sparse antenna arrays may be able to distinguish between signals emitted by multiple nearly collocated antennas, even if the signals have the same frequency, polarization, and coverage. Thus, the use of a large sparse antenna array may be able to resolve/isolate individual antennas on a single platform, allowing for OSDM, analogous to Orthogonal Frequency Divisional Multiplexing (OFDM). Using OSDM, multiple antennas on the same vehicle are able to reuse the same frequencies/polarizations without interference, thereby increasing spectrum availability while still providing the same transmitter power spectral density and total RF power emission.
-
Citations
18 Claims
-
1. A system for generating orthogonal frequency division multiplexing (OSDM) reuse signals, the system comprising:
-
a first beamforming assembly comprising; a first signal source configured to provide a first signal; a first low noise amplifier communicatively coupled with the first signal source and configured to amplify the first signal; a first power divider communicatively coupled with the first low noise amplifier; and a first beamformer; a second beamforming assembly comprising; a second signal source configured to provide a second signal; a second low noise amplifier communicatively coupled with the second signal source and configured to amplify the second signal; a second power divider communicatively coupled with the second low noise amplifier; and a second beamformer; wherein the first and second power dividers are each communicatively coupled with the first and second beamformer, and wherein the first power divider is configured to divide the amplified first signal into a first beamformer component for sending to the first beamformer and a second beamformer component for sending to the second beamformer, and the second power divider is configured to divide the amplified second signal into a first beamformer component for sending to the first beamformer and a second beamformer component for sending to the second beamformer; and wherein the first beamformer includes program means for combining, based on a total array size of the first beamforming assembly and the second beamforming assembly, the received first beamformer components of the first signal and second signal into a first combined signal, and the second beamformer includes program means for combining, based on the first distance, the received second beamformer components of the first signal and second signal into a second combined signal, the first and second combined signals having one or more of a shared frequency, a shared signal polarization, and a shared coverage area, the first and second combined signals formed such that, when the combined signal is received, an additive array factor is provided resulting in a peak in one of the first signal and the second signal and a null on the other of the first signal and second signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A System for receiving orthogonal frequency division multiplexing (OSDM) reuse signals, the system comprising:
-
a first receiving station configured to receive a first combined signal transmitted by a first beamformer assembly and a second combined signal transmitted by a second beamformer assembly, the first and second combined signals each comprising a first signal and a second signal and each transmitted at one or more of a shared frequency, a shared signal polarization, and a shared coverage area; a second receiving station configured to receive the first combined signal and the second combined signal, the first receiving station and the second receiving station are separated by a first distance; and processing circuitry configured to determine the first signal and the second signal based on the received first combined signal and the received second combined signal; wherein the first distance of separation between the first receiving station and the second receiving station is based on an array size of the first beamformer assembly and the second beamformer assembly such that an additive array factor is provided resulting in a peak on one of the first beamformer assembly and second assembly and a null on the other of the first beamformer assembly and second beamformer assembly, and wherein determining the first signal and the second signal from the received first and second combined signals is further based on the additive array factor. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
-
Specification