Feedback cancellation on multiband booster

1. A repeater comprising:

a server antenna port;

a donor antenna port;

a first-direction amplification and filtering path for a first-direction signal, wherein the first-direction amplification and filtering path is coupled between the server antenna port and the donor antenna port;

a second-direction amplification and filtering path for a second-direction signal, wherein the second-direction amplification and filtering path is coupled between the server antenna port and the donor antenna port;

a first-direction channel cancellation circuit coupled between the server antenna port and the donor antenna port to reduce an amplitude of a first-direction selected channel in the first-direction signal; and

a second-direction channel cancellation circuit coupled between the server antenna port and the donor antenna port to reduce an amplitude of a second-direction selected channel in the second-direction signal.

2. The repeater of claim 1 , further comprising:

a first duplexer coupled between the server antenna port and the first amplification path and the second amplification path; and

a second duplexer coupled between the donor antenna port and the first amplification path and the second amplification path.

3. The repeater of claim 2 , further comprising:

a first-direction low-noise amplifier coupled to the first duplexer;

a second-direction low-noise amplifier coupled to the second duplexer;

a first-direction power amplifier coupled to a port of the second duplexer on the first amplification path; and

a second-direction power amplifier coupled to a port of the first duplexer on the second amplification path.

4. The repeater of claim 3 , further comprising:

a first bandpass filter coupled to an output of the first-direction low noise amplifier, wherein the first bandpass filter is configured to output a first-direction band signal comprising a plurality of first-direction channels; and

a second bandpass filter coupled to an output of the second-direction low noise amplifier, wherein the second bandpass filter is configured to output a second-direction band signal comprising a plurality of second-direction channels.

5. The repeater of claim 4 , wherein the first-direction channel cancellation circuit is configured to:

couple the first-direction band signal output from the first bandpass filter;

couple one or more selected channels of the plurality of first-direction channels; and

inject a first-direction channel cancellation signal into the first-direction band signal to reduce the amplitude of the one or more selected channels to form a first-direction channelized signal.

6. The repeater of claim 4 , wherein the second-direction channel cancellation circuit is configured to:

couple the second-direction band signal output from the second bandpass filter;

couple one or more selected channels of the plurality of second-direction channels; and

inject a second-direction channel cancellation signal into the second-direction band signal to reduce the amplitude of the one or more selected channels to form a second-direction channelized signal.

7. The repeater of claim 5 , further comprising a first-direction signal delay located between the coupling of the first-direction band signal and the injection of the first-direction channel cancellation signal.

8. The repeater of claim 6 , further comprising a second-direction signal delay located between the coupling of the second-direction band signal and the injection of the second-direction channel cancellation signal.

9. The repeater of claim 1 , wherein:

the amplitude of the first-direction selected channel is reduced by greater than 20 decibels (dB);

the amplitude of the second-direction selected channel is reduced by greater than 20 dB;

the amplitude of the first-direction selected channel is reduced by greater than 30 dB; or

the amplitude of the second-direction selected channel is reduced by greater than 30 dB.

10. The repeater of claim 1 , wherein:

the amplitude of the first-direction selected channel is greater than an amplitude of other channels in the first-direction signal; or

the amplitude of the second-direction selected channel is greater than an amplitude of other channels in the second-direction signal.

11. A repeater comprising:

a server antenna port;

a donor antenna port;

a first first-direction amplification and filtering path for a first first-direction signal coupled between the server antenna port and the donor antenna port;

a first second-direction amplification and filtering path for a first second-direction signal coupled between the server antenna port and the donor antenna port;

an nth first-direction amplification and filtering path coupled between the server antenna port and the donor antenna port, wherein n is an integer greater than or equal to 0,

an mth first-direction amplification and filtering path coupled between the server antenna port and the donor antenna port, wherein m is an integer greater than or equal to 0,

a first-direction channel cancellation circuit coupled between the server antenna port and the donor antenna port to reduce an amplitude of a first-direction selected channel in the first-direction signal; and

a second-direction channel cancellation circuit coupled between the server antenna port and the donor antenna port to reduce an amplitude of a second-direction selected channel in the second-direction signal.

12. The repeater of claim 11 , further comprising:

a first multiplexer coupled between the server antenna port and the first first-direction amplification and filtering path and the first second-direction amplification and filtering path; and

a second multiplexer coupled between the donor antenna port and the first first-direction amplification and filtering path and the first second-direction amplification and filtering path.

13. The repeater of claim 12 , further comprising:

a first-direction low-noise amplifier coupled to the first multiplexer;

a second-direction low-noise amplifier coupled to the second multiplexer;

a first-direction power amplifier coupled to a port of the second multiplexer on the first first-direction amplification and filtering path; and

a second-direction power amplifier coupled to a port of the first multiplexer on the first second-direction amplification and filtering path.

14. The repeater of claim 13 , further comprising:

a first bandpass filter coupled to an output of the first-direction low noise amplifier, wherein the first bandpass filter is configured to output a first-direction band signal comprising a plurality of first-direction channels; and

a second bandpass filter coupled to an output of the second-direction low noise amplifier, wherein the second bandpass filter is configured to output a second-direction band signal comprising a plurality of second-direction channels.

15. The repeater of claim 14 , wherein the first-direction channel cancellation circuit is configured to:

couple the first-direction band signal output from the first bandpass filter;

couple one or more selected channels of the plurality of first-direction channels; and

inject a first-direction channel cancellation signal into the first-direction band signal to reduce the amplitude of the one or more selected channels to form a first-direction channelized signal.

16. The repeater of claim 14 , wherein the second-direction channel cancellation circuit is configured to:

couple the second-direction band signal output from the second bandpass filter;

couple one or more selected channels of the plurality of second-direction channels; and

inject a second-direction channel cancellation signal into the second-direction band signal to reduce the amplitude of the one or more selected channels to form a second-direction channelized signal.

17. The repeater of claim 15 , further comprising a first-direction signal delay located between the coupling of the first-direction band signal and the injection of the first-direction channel cancellation signal.

18. The repeater of claim 16 , further comprising a second-direction signal delay located between the coupling of the second-direction band signal and the injection of the second-direction channel cancellation signal.

19. The repeater of claim 11 , wherein:

the amplitude of the first-direction selected channel is reduced by greater than 20 decibels (dB);

the amplitude of the second-direction selected channel is reduced by greater than 20 dB;

the amplitude of the first-direction selected channel is reduced by greater than 30 dB; or

the amplitude of the second-direction selected channel is reduced by greater than 30 dB.

20. The repeater of claim 11 , wherein:

the amplitude of the first-direction selected channel is greater than an amplitude of other channels in the first-direction signal; or

the amplitude of the second-direction selected channel is greater than an amplitude of other channels in the second-direction signal.

21. A repeater comprising:

a server antenna port;

a donor antenna port;

a first-direction amplification and filtering path coupled between the server antenna port and the donor antenna port;

a second-direction amplification and filtering path coupled between the server antenna port and the donor antenna port;

a first-direction channel cancellation circuit coupled between the server antenna port and the donor antenna port to reduce an amplitude of a first-direction selected channel in a time division duplex (TDD) signal; and

a second-direction channel cancellation circuit coupled between the server antenna port and the donor antenna port to reduce an amplitude of a second-direction selected channel in the TDD signal.

22. The repeater of claim 21 , further comprising:

a first bandpass filter coupled to an output of a first-direction low noise amplifier, wherein the first bandpass filter is configured to output the TDD signal comprising a plurality of first-direction channels; and

a second bandpass filter coupled to an output of a second-direction low noise amplifier, wherein the second bandpass filter is configured to output the TDD signal comprising a plurality of second-direction channels.

23. The repeater of claim 22 , wherein the first-direction channel cancellation circuit is configured to:

couple the TDD signal output from the first bandpass filter;

couple one or more selected channels of the plurality of first-direction channels; and

inject a first-direction channel cancellation signal into the TDD signal to reduce the amplitude of the one or more selected channels to form a first-direction channelized TDD signal.

24. The repeater of claim 22 , wherein the second-direction channel cancellation circuit is configured to:

couple the TDD signal output from the second bandpass filter;

couple one or more selected channels of the plurality of second-direction channels; and

inject a second-direction channel cancellation signal into the TDD signal to reduce the amplitude of the one or more selected channels to form a second-direction channelized TDD signal.

25. The repeater of claim 23 , further comprising a first-direction signal delay located between the coupling of the TDD signal and the injection of the first-direction channel cancellation signal.

26. The repeater of claim 24 , further comprising a second-direction signal delay located between the coupling of the TDD signal and the injection of the second-direction channel cancellation signal.

27. The repeater of claim 21 , wherein:

the amplitude of the first-direction selected channel is reduced by greater than 20 decibels (dB);

the amplitude of the second-direction selected channel is reduced by greater than 20 dB;

the amplitude of the first-direction selected channel is reduced by greater than 30 dB; or

the amplitude of the second-direction selected channel is reduced by greater than 30 dB.