Wireless communication system compensating for interference and related methods

• US 8,345,780 B2
• Filed: 06/04/2008
• Issued: 01/01/2013
• Est. Priority Date: 06/04/2008
• Status: Active Grant

• Current Assignee: Nera Innovations Limited (Atlantic IP Services Limited)
• Original Assignee: Harris Corporation (L3Harris Technologies, Inc.)
• Inventors: Chauncey, David, Kuliner, Mitel, Theodorou, Elias
• Primary Examiner(s): KASSA, ZEWDU A
• Application Number:
  US12/132,757
• Publication Number:
  US 20090304095A1
• Time in Patent Office: 1,672 Days
• Field of Search: 375/260, 375/259, 375/219, 375/295, 375/316, 375/346, 375/350, 370/328, 370/335, 370/342, 370/310
• US Class Current: 375/260
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0019 in which mode-switching is based on a statistical approach
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0062 Avoidance of ingress interference, e.g. ham radio channels

Abstract

A wireless communication system may include first and second wireless communications devices communicating with one another via a wireless communications link having a settable link characteristic. The first and second wireless communications devices may include respective first and second wireless transceivers and respective first and second controllers coupled thereto. The first controller may be for detecting received interference, for determining a type of the interference from among interference types comprising wideband interference and narrowband interference, and for setting the settable link characteristic to compensate for the interference based upon the interference type.

Claims

1. A wireless communication system comprising:

first and second wireless communications devices configured to communicate with one another via a wireless communications link having at least one settable link characteristic;

said first and second wireless communications devices comprising respective first and second orthogonal frequency-division multiplexing (OFDM) wireless transceivers and respective first and second controllers coupled thereto and configured to store short term and long term historical characteristics of interference;

said first controller configured to

detect received interference,

determine a type of the received interference from among a plurality of interference types comprising wideband interference, self interference, and narrowband interference based upon comparing at least one characteristic of a current received signal with the short term and long term historical characteristics of interference, and

set the at least one settable link characteristic to compensate for the received interference based upon the interference type.

2. The wireless communication system according to claim 1 wherein said first controller is configured to repeat the detecting, determining, and setting.

3. The wireless communication system according to claim 1 wherein the at least one settable link characteristic comprises at least one receive processing characteristic.

4. The wireless communication system according to claim 1 wherein the at least one settable link characteristic comprises at least one transmit processing characteristic;

and wherein said first controller is configured to cooperate with said second controller to set the at least one transmit processing characteristic.

5. The wireless communication system according to claim 1 wherein said first controller is configured to generate an interference map of the received interference onto OFDM cells.

6. The wireless communication system according to claim 5 wherein said first controller is configured to set the at least one settable link characteristic based upon the interference map.

7. The wireless communication system according to claim 1 wherein said first controller is configured to determine the interference type based upon at least one of fade characteristics, noise characteristics, and path characteristics.

8. The wireless communication system according to claim 1 wherein the at least one settable link characteristic comprises at least one of transmission power, frequency diversity, time diversity, modulation, forward error correction (FEC), channel bandwidth, and adaptive filtering.

9. A wireless communications device operable to communicate with an other wireless communications device via a wireless communications link having at least one settable link characteristic, the wireless communications device comprising:

an orthogonal frequency-division multiplexing (OFDM) wireless transceiver; and

a controller coupled to said wireless transceiver and configured to store short term and long term historical characteristics of interference;

said controller configured to

detect received interference,

determine a type of the received interference from among a plurality of interference types comprising wideband interference, self interference, and narrowband interference based upon comparing at least one characteristic of a current received signal with the short term and long term historical characteristics of interference, and

set the at least one settable link characteristic to compensate for the received interference based upon the interference type.

10. The wireless communications device according to claim 9 wherein the at least one settable link characteristic comprises at least one receive processing characteristic.

11. The wireless communications device according to claim 9 wherein the at least one settable link characteristic comprises at least one transmit processing characteristic;

and wherein said controller is configured to cooperate with the other wireless communications device to set the at least one transmit processing characteristic.

12. A method for compensating interference in a wireless communication system comprising first and second orthogonal frequency-division multiplexing (OFDM) wireless communications devices communicating with one another via a wireless communications link having at least one settable link characteristic, the method comprising:

detecting received interference;

storing short term and long term historical characteristics of interference;

determining a type of the received interference from among a plurality of interference types comprising wideband interference, self interference, and narrowband interference based upon comparing at least one characteristic of a current received signal with the short term and long term historical characteristics of interference; and

setting the at least one settable link characteristic to compensate for the received interference based upon the interference type.

13. The method according to claim 12 further comprising repeating the detecting, determining, and setting.

14. The method according to claim 12 wherein the at least one settable link characteristic comprises at least one transmit processing characteristic;

and

further comprising cooperating between the first and second wireless communications devices to set the at least one transmit processing characteristic.