Systems and methods for mitigating interference within actively used spectrum

Patent metadata

Field	Value
Publication number	US-2018097550-A1
Application number	US-201715682076-A
Country	US
Kind code	A1
Filing date	Aug 21, 2017
Priority date	Apr 16, 2014
Publication date	Apr 5, 2018
Grant date	—

Abstract

Systems and methods are described to mitigate interference to out of band receivers using out of band training signals.

First claim

We claim:

1 . A first wireless network operating in TDD mode and comprising of a plurality of wireless transceiver stations,
a second wireless network operating in FDD mode and comprising of one or a plurality of antennas, wherein the first wireless network creates one or a plurality of points of zero radio frequency (RF) energy at the location of at least one of the plurality of antennas.

2 . The system as in claim 1 wherein the points of zero RF energy are created to mitigate out-of-band emission (OOBE) or blocking from the first wireless network to the second wireless network.

3 . The system as in claim 1 wherein the first wireless network is a multi-user multiple antenna system (MU-MAS) that uses precoding to create the points of zero RF energy.

4 . The system as in claim 3 wherein precoding is computed based on channel state information (CSI) between the plurality of wireless transceiver stations of the first wireless network and one or the plurality of antennas of the second wireless network.

5 . The system as in claim 4 wherein the CSI is estimated using in-band or out-of-band training signals sent over a plurality of wireless links between the wireless transceiver stations and one or the plurality of antennas.

6 . A first wireless network operating in TDD mode and comprising of a plurality of wireless transceiver stations,
a second wireless network operating in FDD mode and comprising of one or a plurality of antennas, wherein the first wireless network creates one or a plurality of points of zero radio frequency (RF) energy at the location of at least one of the plurality of antennas, and the second wireless network has no knowledge of TDD operation of the first wireless network.

7 . A first wireless network operating in TDD mode and comprising of a plurality of wireless transceiver stations,
a second wireless network operating in FDD mode and comprising of one or a plurality of antennas, wherein the first wireless network creates one or a plurality of points of zero radio frequency (RF) energy at the location of at least one of the plurality of antennas, and the second wireless network has knowledge of TDD operation of the first wireless network.

8 . A first wireless network operating in TDD mode and comprising of a plurality of wireless transceiver stations,
a second wireless network operating in FDD mode and comprising of one or a plurality of antennas, wherein the first wireless network creates one or a plurality of points of zero radio frequency (RF) energy at the location of at least one of the plurality of antennas, and the first wireless network provides terrestrial wireless services and the second wireless network provides wireless services to aircrafts.

9 . A method for communicating over a network comprising:
a first wireless network operating in TDD mode and comprising of a plurality of wireless transceiver stations, a second wireless network operating in FDD mode and comprising of one or a plurality of antennas, the first wireless network creating one or a plurality of points of zero radio frequency (RF) energy at the location of at least one of the plurality of antennas.

10 . The method as in claim 9 wherein the points of zero RF energy are created to mitigate out-of-band emission (OOBE) or blocking from the first wireless network to the second wireless network.

11 . The method as in claim 9 wherein the first wireless network is a multi-user multiple antenna system (MU-MAS) that uses precoding to create the points of zero RF energy.

12 . The method as in claim 11 wherein precoding is computed based on channel state information (CSI) between the plurality of wireless transceiver stations of the first wireless network and one or the plurality of antennas of the second wireless network.

13 . The method as in claim 12 wherein the CSI is estimated using in-band or out-of-band training signals sent over a plurality of wireless links between the wireless transceiver stations and one or the plurality of antennas.

14 . A method for communicating over a network comprising:
a first wireless network operating in TDD mode and comprising of a plurality of wireless transceiver stations, a second wireless network operating in FDD mode and comprising of one or a plurality of antennas, the first wireless network creating one or a plurality of points of zero radio frequency (RF) energy at the location of at least one of the plurality of antennas, and the second wireless network having no knowledge of TDD operation of the first wireless network.

15 . A method for communicating over a network comprising:
a first wireless network operating in TDD mode and comprising of a plurality of wireless transceiver stations, a second wireless network operating in FDD mode and comprising of one or a plurality of antennas, the first wireless network creating one or a plurality of points of zero radio frequency (RF) energy at the location of at least one of the plurality of antennas, and the second wireless network having knowledge of TDD operation of the first wireless network.

16 . A method for communicating over a network comprising:
a first wireless network operating in TDD mode and comprising of a plurality of wireless transceiver stations, a second wireless network operating in FDD mode and comprising of one or a plurality of antennas, the first wireless network creating one or a plurality of points of zero radio frequency (RF) energy at the location of at least one of the plurality of antennas, and the first wireless network providing terrestrial wireless services and the second wireless network providing wireless services to aircrafts.

Assignees

• Rearden Llc

Inventors

• Perlman Stephen G
• Forenza Antonio
• Di Dio Mario
• Saibi Fadi

Classifications

• H04L5/14

  Two-way operation using the same type of signal, i.e. duplex · CPC title

• H04B15/00

  Suppression or limitation of noise or interference (by means associated with receiver H04B1/10) · CPC title

• H04B7/0456 Primary

  Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting · CPC title

• H04B7/0626 Primary

  Channel coefficients, e.g. channel state information [CSI] · CPC title

• H04L5/0005

  Time-frequency · CPC title