Wireless communications network using frequency conversion of MIMO signals

• US 10,097,257 B2
• Filed: 06/19/2017
• Issued: 10/09/2018
• Est. Priority Date: 12/13/2011
• Status: Active Grant

• Current Assignee: Andrew Wireless Systems GmbH (CommScope Holding Company, Inc.), Fraunhofer Gesellschaft Zur Foerderung Der Angewandten Forsching E.V.
• Original Assignee: Andrew Wireless Systems GmbH (CommScope Holding Company, Inc.), Fraunhofer Gesellschaft Zur Foerderung Der Angewandten Forsching E.V., Karlsruher Institut Fur Technologie
• Inventors: Braz, Oliver, Dussmann, Alfons, Tarlazzi, Luigi, Haustein, Thomas, Wirth, Thomas, Wieruch, Dennis, Jondral, Friedrich, Jakel, Holger
• Primary Examiner(s): Sheikh, Ayaz R
• Assistant Examiner(s): Hampton, Tarell A
• Application Number:
  US15/626,786
• Publication Number:
  US 20170366246A1
• Time in Patent Office: 477 Days
• Field of Search: None
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/145 Passive relay systems
• CPC Class Codes: H04B 7/15542 Selecting at relay station its transmit and receive resources selection of wireless resources by user or terminal H04W72/02; arrangements affording multiple use of the transmission path by two-dimensional division of the resources H04L5/0003, or by allocating sub-channels H04L5/003
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA

Abstract

In one embodiment, a repeater for wireless communication is provided. The repeater comprises: circuitry configured to receive first and second MIMO-coded information channels at a first frequency; a converting device configured to convert the first MIMO-coded information channel to a second frequency using information from a test receiver configured to determine unused frequency ranges situated outside frequency bands allocated to mobile radio for wireless communication, the test receiver communicatively coupled with the converting device, the converting device configured to convert the first MIMO-coded information channel to the second frequency in at least one communication direction, the second frequency within the unused frequency ranges situated outside the frequency bands allocated to mobile radio; and circuitry configured to transmit the first and second MIMO-coded information channels in the at least one communication direction, wherein the first and second MIMO-coded information channels are transmitted using different frequencies compared to each other.

Claims

1. A repeater for wireless communication comprising:

circuitry configured to receive a first MIMO-coded information channel and a second MIMO-coded information channel at a first frequency;

a converting device configured to convert the first MIMO-coded information channel to a second frequency using information from a test receiver configured to determine unused frequency ranges that are situated outside frequency bands allocated to mobile radio for wireless communication, wherein the test receiver is communicatively coupled with the converting device, wherein the converting device is configured to convert the first MIMO-coded information channel to the second frequency in at least one communication direction, wherein the second frequency is within the unused frequency ranges situated outside the frequency bands allocated to mobile radio; and

circuitry configured to transmit the first MIMO-coded information channel and the second MIMO-coded information channel in the at least one communication direction, wherein the first MIMO-coded information channel and the second MIMO-coded information channel are transmitted using different frequencies compared to each other.

2. The repeater of claim 1, wherein the at least one communication direction comprises a downlink direction, wherein the repeater is configured to be connected to a base station via bidirectional couplers and receive the first MIMO-coded information channel and the second MIMO-coded information channel optically or electrically from the base station.

3. The repeater of claim 1, wherein the at least one communication direction comprises an uplink direction, wherein the repeater is configured to receive the first MIMO-coded information channel and the second MIMO-coded information channel from a wireless terminal.

4. The repeater of claim 1, wherein the test receiver is integrated into the repeater.

5. The repeater of claim 1, wherein the converting device is configured to carry out no frequency conversion for the second MIMO-coded information channel, wherein the second MIMO-coded information channel is transmitted at the first frequency.

6. The repeater of claim 1, wherein the converting device is further configured to convert the second MIMO-coded information channel to a third frequency using information from the test receiver configured to determine unused frequency ranges that are situated outside the frequency bands allocated to mobile radio for wireless communication, wherein the converting device is configured to convert the second MIMO-coded information channel to the third frequency in the at least one communication direction, wherein the third frequency is within the unused frequency ranges situated outside the frequency bands allocated to mobile radio.

7. A repeater for wireless communication comprising:

circuitry configured to receive communication signals on a first MIMO-coded information channel and a second MIMO-coded information channel, wherein a frequency of the first MIMO-coded information channel is outside frequency bands allocated to mobile radio for wireless communication, wherein a frequency of the second MIMO-coded information channel is different than the frequency of the first MIMO-coded information channel;

a converting device configured to convert the frequency of the first MIMO-coded information channel in at least one communication direction to a frequency within the frequency bands allocated to mobile radio for wireless communication; and

circuitry configured to transmit the first MIMO-coded information channel and the second MIMO-coded information channel in the at least one communication direction, wherein the first MIMO-coded information channel and the second MIMO-coded information channel are transmitted using equal frequencies.

8. The repeater of claim 7, wherein the at least one communication direction comprises a downlink direction, wherein the repeater is configured to wirelessly transmit the first MIMO-coded information channel and the second MIMO-coded information channel using equal frequencies to a wireless terminal.

9. The repeater of claim 7, wherein the at least one communication direction comprises an uplink direction, wherein the repeater is configured to be connected to a base station via bidirectional couplers and transmit the first MIMO-coded information channel and the second MIMO-coded information channel optically or electrically to the base station.

10. The repeater of claim 7, wherein the frequency of the second MIMO-coded information channel is outside frequency bands allocated to mobile radio for wireless communication, wherein the converting device is further configured to convert the frequency of the second MIMO-coded information channel to a frequency within the frequency bands allocated to mobile radio for wireless communication.

11. The repeater of claim 7, wherein the frequency of the second MIMO-coded information channel is within frequency bands allocated to mobile radio for wireless communication, wherein the converting device is configured to carry out no frequency conversion for the second MIMO-coded information channel.

12. A distributed antenna system (DAS) for wireless communication comprising:

at least one remote unit configured to receive a first MIMO-coded information channel and a second MIMO-coded information channel at a first frequency;

a converting device configured to convert a frequency of the first MIMO-coded information channel to a second frequency using information from a test receiver configured to determine unused frequency ranges that are situated outside the frequency bands allocated to mobile radio for wireless communication, wherein the test receiver is communicatively coupled with the converting device, wherein the converting device is configured to convert the first MIMO-coded information channel to the second frequency in at least one communication direction, wherein the second frequency is within the unused frequency ranges situated outside the frequency bands allocated to mobile radio; and

a master unit communicatively coupled to the at least one remote unit via one or more signal lines, wherein the master unit is configured to receive a transmission signal containing the MIMO-coded information channels via the one or more signal lines, wherein the master unit comprises;

circuitry configured to transmit the first MIMO-coded information channel and the second MIMO-coded information channel in the at least one communication direction, wherein the first MIMO-coded information channel and the second MIMO-coded information channel are transmitted using different frequencies compared to each other.

13. The DAS of claim 12, wherein the converting device is integrated into the at least one remote unit.

14. The DAS of claim 12, wherein the converting device is integrated into the master unit.

15. The DAS of claim 12, wherein the master unit and the remote unit each comprise a test receiver, wherein the test receivers are connected to one another and synchronized with regard to a frequency to be selected for frequency conversion of the first MIMO-coded information channel.

16. The DAS of claim 12, wherein the converting device is configured to carry out no frequency conversion for the second MIMO-coded information channel, wherein the second MIMO-coded information channel is transmitted at the first frequency.

17. The DAS of claim 12, wherein the converting device is further configured to convert the second MIMO-coded information channel to a third frequency using information from the test receiver configured to determine unused frequency ranges that are situated outside the frequency bands allocated to mobile radio for wireless communication, wherein the converting device is configured to convert the second MIMO-coded information channel to the third frequency in the at least one communication direction, wherein the third frequency is within the unused frequency ranges situated outside the frequency bands allocated to mobile radio.

18. A distributed antenna system (DAS) for wireless communication comprising:

a master unit configured to receive communication signals on a first MIMO-coded information channel and a second MIMO-coded information channel, wherein a frequency of the first MIMO-coded information channel is outside frequency bands allocated to mobile radio for wireless communication, wherein a frequency the second MIMO-coded information channel is within the frequency bands allocated to mobile radio for wireless communication;

a converting device configured to convert the frequency of the first MIMO-coded information channel in at least one communication direction to a frequency within the frequency bands allocated to mobile radio for wireless communication; and

at least one remote unit communicatively coupled to the master unit via one or more signal lines, wherein the at least one remote unit comprises;

circuitry configured to transmit a communication signal wirelessly with the first MIMO-coded information channel and the second MIMO-coded information channel in the at least one communication direction, wherein the first MIMO-coded information channel and the second MIMO-coded information channel are transmitted using equal frequencies.

19. The DAS of claim 18, wherein the converting device is integrated into the at least one remote unit.

20. The DAS of claim 18, wherein the converting device is integrated into the master unit.

21. The DAS of claim 18, wherein the converting device is further configured to convert the frequency of the first MIMO-coded information channel based on information from a test receiver.

22. The DAS of claim 18, wherein the converting device is configured to carry out no frequency conversion for the second MIMO-coded information channel.