Wireless devices and systems including examples of full duplex transmission

• US 10,805,128 B2
• Filed: 08/20/2018
• Issued: 10/13/2020
• Est. Priority Date: 03/02/2017
• Status: Active Grant

• Current Assignee: Lodestar Licensing Group LLC
• Original Assignee: Micron Technology, Inc.
• Inventors: Luo, Fa-Long, Chritz, Jeremy, Cummins, Jaime, Schmitz, Tamara
• Primary Examiner(s): Pan, Yuwen
• Assistant Examiner(s): Perez, Angelica M
• Application Number:
  US16/105,915
• Publication Number:
  US 20190007242A1
• Time in Patent Office: 785 Days
• CPC Class Codes: H04B 1/10 Means associated with receiver for limiting or suppressing noise or interference
• CPC Class Codes: H04B 1/123 using adaptive balancing or compensation means adaptive filter circuits and algorithms H03H
• CPC Class Codes: H04B 1/525 with means for reducing leakage of transmitter signal into the receiver
• CPC Class Codes: H04B 17/21 for calibration; for correcting measurements
• CPC Class Codes: H04B 17/345 Interference values signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] H04B17/336
• CPC Class Codes: H04B 7/04 using two or more spaced independent antennas
• CPC Class Codes: H04L 25/0224 using sounding signals
• CPC Class Codes: H04L 25/03866 using scrambling
• CPC Class Codes: H04L 25/08 Modifications for reducing interference; Modifications for reducing effects due to line faults ; Receiver end arrangements for detecting or overcoming line faults
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex

Abstract

Examples described herein include systems and methods which include wireless devices and systems with examples of full duplex compensation with a self-interference noise calculator. The self-interference noise calculator may be coupled to antennas of a wireless device and configured to generate adjusted signals that compensate self-interference. The self-interference noise calculator may include a network of processing elements configured to combine transmission signals into sets of intermediate results. Each set of intermediate results may be summed in the self-interference noise calculator to generate a corresponding adjusted signal. The adjusted signal is received by a corresponding wireless receiver to compensate for the self-interference noise generated by a wireless transmitter transmitting on the same frequency band as the wireless receiver is receiving.

Claims

1. An apparatus comprising:

a plurality of wireless transceivers, each wireless transceiver configured to provide a respective signal of a plurality of signals to a respective antenna of a plurality of antennas; and

a self-interference noise calculator coupled to the plurality of wireless transceivers, the self-interference noise calculator configured to generate a plurality of adjusted signals, the self-interference noise calculator comprising;

a network of processing elements configured to combine the plurality of signals into a plurality of sets of intermediate results, each signal received from a respective wireless transceiver of the plurality of wireless transceivers,

wherein the network of processing elements further configured to sum each set of intermediate results to generate a corresponding adjusted signal of the plurality of adjusted signals,

wherein each intermediate processing result of a selected set of the plurality of sets of intermediate results is weighted according to a respective weight for the corresponding adjusted signal, the respective weight based on an amount of interference to the respective signal from the corresponding intermediate processing result.

2. The apparatus of claim 1, wherein the self-interference noise calculator is configured to generate the plurality of adjusted signals based on a respective self-interference statistic of a plurality of self-interference statistics.

3. The apparatus of claim 1, further comprising:

a plurality of compensation components, each compensation component coupled to a respective wireless transceiver and configured to generate a respective compensated signal based on the plurality of adjusted signals.

4. The apparatus of claim 3, wherein the self-interference noise calculator is configured to provide a respective adjustment signal to a respective compensation component.

5. The apparatus of claim 3, wherein each compensation component configured to subtract a respective adjusted signal from a respective radio frequency (RF) signal to generate the respective compensated signal.

6. The apparatus of claim 3, wherein each wireless transceiver of the plurality of wireless transceivers is configured to receive the respective compensated signal and to generate a respective processed signal based on the respective compensated signal.

7. The apparatus of claim 6, wherein each wireless transceiver comprises:

a radio configured to down-convert the respective compensated signal to a respective baseband signal;

an analog-to-digital converter configured to convert the respective baseband signal to a respective digital baseband signal; and

a fast Fourier transform component configured to convert the respective digital baseband signal to the respective processed signal.

8. The apparatus of claim 1, wherein each respective signal comprises a signal representative of interference to a different antenna than the respective antenna that was provided the respective signal by the respective wireless transceiver.

9. The apparatus of claim 1, wherein each wireless transceiver of the plurality of wireless transmitters is configured to generate the respective signal based on a respective signal to be transmitted, wherein each wireless transmitter comprises:

an inverse fast Fourier transform component configured to convert the respective signal to be transmitted to a respective frequency-domain signal;

an analog-to-digital converter configured to convert the respective frequency-domain signal to a respective analog baseband signal; and

a radio configured to up-convert the respective analog baseband signal to the respective signal.

10. The apparatus of claim 1, wherein each wireless transceiver is configured to receive the corresponding adjusted signal.

11. An apparatus comprising:

a plurality of antennas, each antenna configured to transmit a respective wireless communications signal;

a self-interference noise calculator coupled to each antenna of the plurality of antennas, the self-interference noise calculator comprising;

a plurality of multiplication processing units, each multiplication processing unit configured to generate a plurality of noise processing results based on the respective wireless communications signal;

a plurality of accumulation processing units, each accumulation processing unit configured to generate a respective adjustment signal of a plurality of adjustment signals based on at least one noise processing result of the plurality of noise processing results, wherein each accumulation processing unit is further configured to sum a set of intermediate results to generate the respective adjusted signal of the plurality of adjusted signals; and

a plurality of weighted connections, each weighted connection configured to couple one of the multiplication processing units to one of the accumulation processing units,

wherein each intermediate processing result of the set of intermediate results is weighted according to a respective weight for the corresponding adjusted signal, the respective weight based on an amount of interference to the respective wireless communications signal from the corresponding intermediate processing result.

12. The apparatus of claim 11, wherein each weighted connection comprises a respective weight for the weighted connection.

13. The apparatus of claim 11, wherein each multiplication processing unit comprises a vector representative of self-interference at an antenna of the plurality of antennas from at least one other antenna of the plurality of antennas.

14. A method comprising:

generating a plurality of connection weights for a corresponding connection of the self-interference noise calculator;

coupling a respective one of a plurality of multiplication processing units to a respective one of a plurality of accumulation processing units using a respective connection weight of the plurality of connection weights;

receiving a plurality of signals to be transmitted at a self-interference noise calculator;

processing, at the plurality of multiplication processing units and the plurality of accumulation processing units, the plurality of signals to be transmitted in accordance with a plurality of vectors and the plurality of connection weights to generate adjustment signals based on at least self-interference noise of a corresponding path to a first antenna of a plurality of antennas from at least a second antenna of the plurality of antennas; and

adjusting a plurality of signals received at respective antennas of the plurality of antennas with a corresponding adjustment signal.

15. The method of claim 14, further comprising:

transmitting the plurality of signals to be transmitted at a first frequency band of a plurality of frequency bands; and

simultaneously, receiving the plurality of signals received at the respective antennas.

16. The method of claim 14, further comprising:

determining the plurality of vectors for the self-interference noise calculator, each vector representative of self-interference of a corresponding path to the first antenna from at least the second antenna.

17. The method of claim 16, wherein determining the plurality of vectors for the self-interference noise calculator comprises:

selecting a set of vectors from a vector set based on at least one of a Gaussian function, a multi-quadratic function, an inverse multi-quadratic function, a thin-plate spine function, a piece-wise linear function, or a cubic approximation function.

18. The method of claim 16, wherein determining the plurality of vectors for the self-interference noise calculator comprises:

determining a set of sample vectors;

assigning a respective set of training points to each sample vector; and

minimizing error of the plurality of adjustment signals based on a computation of each sample vector with the respective set of training points to determine the plurality of vectors.

19. The method of claim 16, wherein generating the plurality of connection weights for the corresponding connection of the self-interference noise calculator comprises:

randomly selecting a plurality of connection weights;

recursively, minimizing an error of the plurality of adjustment signals based on a summation of the plurality of connection weights.