SINGLE INPUT SINGLE OUTPUT REPEATER FOR RELAYING A MULTIPLE INPUT MULTIPLE OUTPUT SIGNAL

• US 20110292863A1
• Filed: 07/04/2009
• Published: 12/01/2011
• Est. Priority Date: 11/26/2008
• Status: Abandoned Application

• Current Assignee: Andrew LLC (CommScope Holding Company, Inc.)
• Original Assignee: Andrew LLC (CommScope Holding Company, Inc.)
• Inventors: Schmalisch, Mathias Andreas, Stefanik, Jorg, Eisenwinter, Stefan, Braz, Oliver
• Application Number:
  US13/131,159
• Publication Number:
  US 20110292863A1
• Time in Patent Office: Days
• US Class Current: 370/315
• CPC Class Codes: H04B 17/3911 Fading models or fading generators
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0669 using different channel coding between antennas space-time coding H04L1/0618
• CPC Class Codes: H04B 7/155 Ground-based stations H04B7/204 takes precedence

Abstract

A multiple input multiple output (MIMO) signal is retransmitted using a single input single output (SISO) repeater, which includes Rayleigh channel simulators associated with each separate MIMO channel. Before being combined and transmitted over a single channel, the transmission undergoes simulated Rayleigh fading. The signal is then retransmitted to be received by a MIMO-equipped receiver.

Claims

1-11. -11. (canceled)

12. A SISO repeater system comprising:

a plurality of signal input channels configured for receiving respective input signals to be repeated;

a Rayleigh channel simulator coupled with each signal input channel, the Rayleigh channel simulator configured to process each signal received by the plurality of input channels into a signal consistent with a Rayleigh distribution; and

a signal combiner network for combining the plurality of processed signals onto a single signal path that is retransmitted by the SISO repeater system.

13. The SISO repeater system of claim 12, further comprising a plurality of antennas coupled in the signal input channels for receiving the respective input signals.

14. The SISO repeater system of claim 12, further comprising an antenna coupled with the signal combiner for retransmitting signals in the single signal path.

15. The SISO repeater system of claim 12, further comprising a signal divider network to divide signals in the single signal path and plurality of antennas coupled with the signal combiner for retransmitting the signals.

16. The SISO repeater system of claim 12, further comprising a cable distribution system coupled with the signal combiner network, the cable distribution system configured for transmitting signals in the single signal path to be further retransmitted by the SISO repeater.

17. The SISO repeater system of claim 12, wherein the cable distribution network includes at least one of a coaxial cable or a fiber optic cable.

18. The SISO repeater system of claim 12, wherein each Rayleigh channel simulator is configured to multiply its respective input signal by a complex Gaussian random variable in order to simulate a signal consistent with a Rayleigh distribution.

19. The SISO repeater system of claim 12, wherein each Rayleigh channel simulator represents a plurality of signal delay channels.

20. The SISO repeater system of claim 12, wherein the SISO repeater system is a wireless repeater system,

the plurality of signal input channels each further including an associated antenna for receiving input signals, and

a single antenna coupled to the single signal path and configured for retransmitting signals in the single signal path.

21. The SISO repeater system of claim 12, wherein the SISO repeater system is a cable repeater system,

the plurality of signal input channels each further including a cable coupled with the Rayleigh channel simulator associated with the input channel, and

wherein the single combined signal is retransmitted through a single coverage antenna.

22. The SISO repeater system of claim 12, wherein the SISO repeater system is a cable repeater system,

the plurality of signal input channels each further including a cable coupled with the Rayleigh channel simulator associated with the input channel;

a plurality of relay cables coupled with a signal divider network, the signal divider network configured for splitting the single signal path so the signals are retransmitted through the plurality of relay cables.

23. The SISO repeater system of claim 12, wherein the SISO repeater system is a cable repeater system,

the plurality of signal input channels each further including a cable coupled with the Rayleigh channel simulator associated with the input channel,

a plurality of antennas coupled with a signal divider network, the signal divider network configured for splitting the single signal path so the signals are retransmitted through the plurality of antennas.

24. A communication system comprising:

a first SISO repeater configured to receive a signal from a transmitting device,

at least a second SISO repeater configured to receive the signal from the same transmitting device;

the first and second SISO repeaters operating in parallel and configured to each carry and provide redundant transmission of the signal in overlapping regions;

a receiving device having multiple receive antennas, the receiving device, in an overlapping region, receiving the signal from each of the first and second SISO repeaters with each of the multiple receiving antennas.

25. The communication system of claim 24, wherein the first and second SISO repeaters are located in close proximity for operating in parallel.

26. The communication system of claim 24, wherein the first and second SISO repeaters operate independently of each other.

27. The communication system of claim 24, wherein the transmitting device is one of a base station or a wireless device.

28. The communication system of claim 24, wherein the receiving device is one of a base station or a wireless device.

29. A method for repeating a MIMO signal, comprising:

configuring a plurality of signal input channels to receive multiple MIMO input signals;

separately processing the input signals of each of the plurality of signal input channels into a simulated signal consistent with a Rayleigh distribution; and

combining the multiple simulated signals onto a single signal path;

retransmitting the combined signals.

30. The method of claim 29, further comprising:

retransmitting the combined signal over at least one of an antenna or a cable.

31. The method of claim 29, wherein the processing of the plurality of signal input channels includes multiplying each respective input signal by a complex Gaussian random variable in order to simulate a signal consistent with a Rayleigh distribution.