Distributed collaborative signaling in full duplex wireless transceivers

• US 9,763,104 B2
• Filed: 05/13/2013
• Issued: 09/12/2017
• Est. Priority Date: 05/13/2012
• Status: Active Grant

• Current Assignee: Amir Keyvan Khandani
• Original Assignee: Amir Keyvan Khandani
• Inventors: Khandani, Amir Keyvan
• Primary Examiner(s): Ferris, Derrick
• Assistant Examiner(s): Ajid, Abdeltif
• Application Number:
  US13/893,299
• Publication Number:
  US 20130301484A1
• Time in Patent Office: 1,583 Days
• Field of Search: 370277
• 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 7/026 Co-operative diversity, e.g. using fixed or mobile stations as relays
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0417 Feedback systems
• CPC Class Codes: H04B 7/0478 Special codebook structures directed to feedback optimisation
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/0669 using different channel coding between antennas space-time coding H04L1/0618
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity
• CPC Class Codes: H04L 1/18 Automatic repetition systems, e.g. Van Duuren systems
• CPC Class Codes: H04L 1/1825 Adaptation of specific ARQ protocol parameters according to transmission conditions
• CPC Class Codes: H04L 1/1896 ARQ related signaling
• CPC Class Codes: H04L 2001/0097 Relays
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 12/04 Key management, e.g. using generic bootstrapping architecture [GBA]
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks

Abstract

Two-way (full-duplex) wireless links in facilitating network management and improve network performance. Once aspect includes methods for network management using an overlaid network for control signaling. Another aspects include methods to facilitate practical realization and improve performance of some of the network information theoretic configurations, such as Space-Division Multiple Access (SDMA) in uplink and downlink, Interference Channel, and other forms of distributed collaborative signaling schemes. Another aspect includes methods to support cognitive wireless networks.

Claims

1. A method comprising:

in a full duplex transceiver, transmitting from a transmit antenna, a first transmit message to a distant first receiver while simultaneously receiving a first receive message from a second full duplex transceiver, wherein the first receive message is intended for a second receiver, and wherein the first transmit message and the first receive message overlap in frequency;

applying a filter at least to the first receive message to generate a filtered first receive message, wherein the filter is selected such that the transmission of the filtered first receive message at least partially cancels the first receive message at the first receiver and wherein the filter is based at least in part on a first transfer function between the full duplex transceiver and the first receiver and a second transfer function between the second full duplex transceiver and the first receiver; and

transmitting from the transmit antenna, a superposition of the first transmit message with the filtered first receive message while continuing to receive the first receive message.

2. The method of claim 1 wherein the first transmit message is a first coded block of data and the first receive signal message is a second coded block of data.

3. A method comprising:

in a first full duplex transceiver, transmitting a first message to a first distant receiver while simultaneously receiving a second message from a second full duplex transceiver, wherein the second message is intended for a second distant receiver, and wherein the first message and the second message overlap in frequency;

in the second full duplex transceiver, transmitting the second message to a second receiver while simultaneously receiving the first message from the first full duplex transceiver;

in the first and second full-duplex transceiver, receiving transmission policy information and responsively forming a distributed space-time code from the first message and transmitting the distributed space-time code from the first and second full duplex transceivers in a next time duration, wherein the transmission of the distributed space-time code includes relaying a noisy version of the first message, and is based on either a completely decoded or partially decoded first message to remove or reduce the effect of the noise.

4. The method of claim 3 wherein, to reduce or remove noise, the decoding is based on one of:

hard decision decoding, soft decision decoding or soft output decoding.

5. The method of claim 3, wherein the space-time code is a distributed Alamouti code.

6. An apparatus comprising:

a full duplex transceiver having a transmitter and a transmit antenna, configured to transmit a first transmit message to a distant first receiver;

the full duplex transceiver having a receiver configured to simultaneously receive a first receive message from a second full duplex transceiver, wherein the first receive message is intended for a second receiver, and wherein the first transmit message and the first receive message overlap in frequency;

a filter within the full duplex transceiver configured to filter the first receive message and to generate a filtered first receive message, wherein the filter is selected such that the transmission of the filtered first receive message at least partially cancels the first receive message at the first receiver and wherein the filter is based at least in part on a first transfer function between the full duplex transceiver and the first receiver and a second transfer function between the second full duplex transceiver and the first receiver; and

wherein the transmitter is configured to transmit from the transmit antenna, a superposition of the first transmit message with the filtered first receive message while continuing to receive the first receive message.