System architecture for optimizing the capacity of adaptive array systems

• US 9,735,940 B1
• Filed: 03/14/2014
• Issued: 08/15/2017
• Est. Priority Date: 04/12/2012
• Status: Active Grant

• Current Assignee: Tarana Wireless, Incorporated
• Original Assignee: Tarana Wireless, Incorporated
• Inventors: Bakr, Omar, Branlund, Dale
• Primary Examiner(s): Pham, Chi H
• Assistant Examiner(s): Rivas, Raul
• Application Number:
  US14/214,229
• Time in Patent Office: 1,250 Days
• Field of Search: None
• CPC Class Codes: H04B 7/0408 using two or more beams, i.e. beam diversity
• CPC Class Codes: H04B 7/0417 Feedback systems
• CPC Class Codes: H04B 7/0695 using beam selection
• CPC Class Codes: H04J 3/1694 Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers Passive Optical Networks H04Q11/0062
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/1438 Negotiation of transmission parameters prior to communication modified according to link quality H04L1/0001
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services

Abstract

A wireless communications system that uses adaptive arrays is disclosed in which the capacity is optimized. A method for optimizing the capacity of a wireless communications system that uses adaptive arrays is also disclosed. The wireless communication system may be a point to multi-point (P2MP) and/or a multi-point to multi-point (MP2MP) STAP system.

Claims

1. A method for training an adaptive array communication system, the method comprising:

providing a packet in a wireless communication signal over a first RF channel to an array of antennas by replacing a preamble of the packet with a reference symbol that is used for training a space-time adaptive processing system;

training the space-time adaptive processing system in an adaptive array system using one or more control symbols in the packet to control the array of antennas while optimizing the capacity of the adaptive array system over the first RF channel; and

wherein the reference symbol further comprises a constant amplitude zero auto correlation code.

2. A method for training an adaptive array communication system, the method comprising:

providing a packet in a wireless communication signal over a first RF channel to an array of antennas by replacing a preamble of the packet with a reference symbol that is used for training a space-time adaptive processing system;

training the space-time adaptive processing system in an adaptive array system using one or more control symbols in the packet to control the array of antennas while optimizing the capacity of the adaptive array system over the first RF channel; and

sending a map change in a second channel different from the first RF channel.

3. A method for training an adaptive array communication system, the method comprising:

providing a packet in a wireless communication signal over a first RF channel to an array of antennas by replacing a preamble of the packet with a reference symbol that is used for training a space-time adaptive processing system;

training the space-time adaptive processing system in an adaptive array system using one or more control symbols in the packet to control the array of antennas while optimizing the capacity of the adaptive array system over the first RF channel; and

multiplexing the reference symbol onto a map symbol and recovering the reference code at a receiver to increase time bandwidth product training of the space-time adaptive processing system.

4. The method of claim 3, wherein the reference symbol further comprises a constant amplitude zero auto correlation code.

5. A method for training an adaptive array communication system, the method comprising:

providing a packet in a wireless communication signal over a first RF channel to an array of antennas by replacing a preamble of the packet with a reference symbol that is used for training a space-time adaptive processing system, the packet having one or more payload symbols modulated at a first modulation and one or more control symbols having one or more payload symbols in the packet modulated at a second lower modulation;

training the space-time adaptive processing system in an adaptive array system using the one or more control symbols in the packet to control the array of antennas while optimizing the capacity of the adaptive array system over the first RF channel.

6. The method of claim 5, wherein the first modulation is 256 quadrature amplitude modulation (QAM) and the second modulation is 16 QAM.

7. The method of claim 5, wherein the first and second modulation are each an adaptive modulation.

8. A method for training an adaptive array communication system, the method comprising:

providing a packet in a wireless communication signal over a first RF channel to an array of antennas by replacing a preamble of the packet with a reference symbol that is used for training a space-time adaptive processing system;

training the space-time adaptive processing system in an adaptive array system using one or more control symbols in the packet to control the array of antennas while optimizing the capacity of the adaptive array system over the first RF channel; and

automatically optimizing one or more of a degree of freedom, a time bandwidth product, a delayline tap and a number of subbands of the space-time adaptive processing system based on measurement of a propagation environment.

9. A method for training an adaptive array communication system, the method comprising:

providing a packet in a wireless communication signal over a first RF channel to an array of antennas by replacing a preamble of the packet with a reference symbol that is used for training a space-time adaptive processing system;

training the space-time adaptive processing system in an adaptive array system using one or more control symbols in the packet to control the array of antennas while optimizing the capacity of the adaptive array system over the first RF channel; and

automatically optimizing one of a time bandwidth product and a modulation and coding scheme based on a time variability of the first RF channel.