Time-reversal wireless systems having asymmetric architecture
First Claim
1. An apparatus, comprising:
- an input circuit configured to derive a channel response signal from a probe signal sent from a first device to the apparatus through multiple wireless propagation paths, and to receive a combined signals that includes a first signal from the first device and a second signal from a second device; and
a data processor configured to calculate a signature waveform for the first device based on the derived channel response signal, and to determine the first signal based on the combined signal and the calculated signature waveform;
wherein the data processor is further configured to generate a combined downlink signal from a combination of a first downlink waveform and a second downlink waveform, the first downlink waveform including data intended for the first device, the second downlink waveform including data intended for the second device.
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Abstract
In an asymmetric time-reversal wireless system, a base station includes an input circuit configured to, during a hand-shake period, receive a channel response signal derived from a probe signal sent from a first terminal device to the apparatus through multiple wireless propagation paths, and during an uplink transmission period, receive combined signals that include a signal from the first terminal device and a signal from a second terminal device. The base station includes a data processor configured to calculate a signature waveform for the first terminal device based on the channel response, and determine the signal sent from the first terminal device during the uplink transmission period based on the combined signals and the signature waveform for the first terminal device.
68 Citations
21 Claims
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1. An apparatus, comprising:
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an input circuit configured to derive a channel response signal from a probe signal sent from a first device to the apparatus through multiple wireless propagation paths, and to receive a combined signals that includes a first signal from the first device and a second signal from a second device; and a data processor configured to calculate a signature waveform for the first device based on the derived channel response signal, and to determine the first signal based on the combined signal and the calculated signature waveform; wherein the data processor is further configured to generate a combined downlink signal from a combination of a first downlink waveform and a second downlink waveform, the first downlink waveform including data intended for the first device, the second downlink waveform including data intended for the second device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system, comprising:
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a base station; and a first circuit configured to send a probe signal through multiple wireless propagation paths to the base station; wherein the base station comprises an input circuit configured to receive a channel response signal derived from the probe signal, wherein the base station is configured to receive combined signals that include a signal from the first circuit and a signal from a second circuit, wherein the base station comprises a data processor configured to calculate a signature waveform for the first circuit based on the channel response signal, and determine the signal sent from the first circuit based on the combined signals and the signature waveform for the first circuit, and wherein the data processor of the base station is configured to determine a combined downlink signal from a combination of a first downlink waveform and a second downlink waveform, the first downlink waveform including data intended for the apparatus, the second downlink waveform including another data intended for another apparatus. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A wireless communications system comprising:
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a base station comprising a data processor, at least two devices that communicate with the base station, wherein the at least two devices each sends a probe signals to the base station, wherein the base station detects and stores a channel response signals respectively derived from each of the received probe signal, wherein the base station uses the stored channel response signals associated with each of the at least two devices to preferentially communicate with the each of the last least two devices; and wherein the data processor of the base station is configured to generate a combined downlink signal from a combination of a first downlink waveform and a second downlink waveform, the first downlink waveform including data intended for one of the at least two devices, the second downlink waveform including data intended for another one of the at least two devices. - View Dependent Claims (21)
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Specification