INTELLIGENT BACKHAUL RADIO WITH CO-BAND ZERO DIVISION DUPLEXING

• US 20150103745A1
• Filed: 12/16/2014
• Published: 04/16/2015
• Est. Priority Date: 06/21/2012
• Status: Active Grant

• Current Assignee: COMS IP Holdings LLC
• Original Assignee: CBF Networks, Inc. (COMSovereign Holding Corp.)
• Inventors: Negus, Kevin J., Proctor, James A. Jr.
• Granted Patent: US 9,490,918 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H01Q 21/062 using dipole aerials; H01Q21/067, H01Q21/068 take precedence
• CPC Class Codes: H01Q 21/24 Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00
• CPC Class Codes: H04B 1/38 Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
• CPC Class Codes: H04B 1/525 with means for reducing leakage of transmitter signal into the receiver
• CPC Class Codes: H04B 1/54 using the same frequency for two directions of communication H04B1/44 takes precedence
• CPC Class Codes: H04B 15/00 Suppression or limitation of noise or interference by means associated with receiver H04B1/10
• CPC Class Codes: H04L 5/1423 for simultaneous baseband signals
• CPC Class Codes: H04L 5/1461 Suppression of signals in the return path, i.e. bidirectional control circuits
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition

Abstract

A intelligent backhaul radio is disclosed, which can operate by zero division duplexing for use in PTP or PMP topologies, providing for significant spectrum usage benefits among other benefits. Specific system architectures and structures to enable active cancellation of multiple transmit signals at multiple receivers within a MIMO radio are disclosed. Further disclosed aspects include the adaptive optimization of cancellation parameters or coefficients.

Claims

1. An intelligent backhaul radio comprising:

a plurality of transmit radio frequency (RF) chains to convert from a plurality of transmit chain input signals to a plurality of respective RF transmit chain signals;

a plurality of receive RF chains to convert a plurality of receive RF signals to respective baseband sampled signals, wherein the receive RF signals comprise one or more transmitter related signals, each respectively derived from one of the RF transmit chain signals;

a plurality of receive baseband cancellation combiners to combine a plurality of baseband filtered signals to provide a plurality of receive symbol streams;

a plurality of adaptable baseband filter sets, each set of the plurality of adaptable baseband filter sets to filter respective ones of the plurality of baseband sampled signals and each set to provide a plurality of baseband filtered signals respectively to each of the plurality of respective receive baseband cancellation combiners, where one or more of said plurality of adaptable baseband filter sets comprise a plurality of adaptable baseband filters; and

a cancellation controller to adapt each of said plurality of adaptable baseband filters to reduce an interfering signal component within one or more of said receive symbol streams, wherein the controller utilizes a metric that accounts for the level of said interfering signal component within one or more of said receive symbol streams and is derived from one or more of said receive RF signals or said receive symbol streams, and wherein said interfering signal component is derived from one or more of said RF transmit chain signals.