Multi-stage isolation sub-system for a remote antenna unit
First Claim
1. A multi-stage isolation sub-system, comprising:
- a first stage device configured to generate a first cancellation signal for attenuating a downlink leakage signal received on an uplink channel, the first cancellation signal comprising an inverse signal characteristic as compared to the downlink leakage signal; and
a second stage device communicatively coupled to the first stage device and configured to generate a second cancellation signal for attenuating residual downlink noise and downlink intermodulation products received on the uplink channel.
7 Assignments
0 Petitions
Accused Products
Abstract
Certain features relate to a remote antenna unit having a multi-stage isolation sub-system for isolating uplink and downlink signal paths. A multi-stage isolation sub-system in the remote antenna unit can include a first stage device that is configured to generate a cancellation signal for canceling unwanted downlink signals received at the uplink antenna. The isolation sub-system can also include a second stage device configured to generate a cancellation signal that attenuates residual noise and intermodulation products generated in the downlink path and received in the uplink path. The multi-stage isolation sub-system can combine the cancellation signals with signals received on the uplink path in order to cancel or attenuate downlink leakage signals and residual noise present on the uplink path.
-
Citations
24 Claims
-
1. A multi-stage isolation sub-system, comprising:
-
a first stage device configured to generate a first cancellation signal for attenuating a downlink leakage signal received on an uplink channel, the first cancellation signal comprising an inverse signal characteristic as compared to the downlink leakage signal; and a second stage device communicatively coupled to the first stage device and configured to generate a second cancellation signal for attenuating residual downlink noise and downlink intermodulation products received on the uplink channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method, comprising:
-
generating a first cancellation signal comprising an inverse signal characteristic as compared to a downlink leakage signal received on an uplink channel by a radio circuit; generating a second cancellation signal for attenuating residual downlink noise and downlink intermodulation products received on the uplink channel; attenuating the downlink leakage signal by combining the first cancellation signal with signals received on the uplink channel; and attenuating the residual downlink noise and downlink intermodulation products by combining the second cancellation signal with the signals received on the uplink channel. - View Dependent Claims (12, 13, 14, 15, 16, 17)
-
-
18. A remote antenna unit, comprising:
-
a multi-stage isolation sub-system communicatively coupled to an uplink antenna and a downlink antenna, the multi-stage isolation sub-system comprising; a first stage device configured to generate a first cancellation signal to attenuate a downlink leakage signal received at the uplink antenna, the first cancellation signal comprising an inverse signal characteristic as compared to the downlink leakage signal received at the uplink antenna; and a second stage device, communicatively coupled to the first stage device, the second stage device configured to generate a second cancellation signal to attenuate residual downlink noise and downlink intermodulation products received at the uplink antenna. - View Dependent Claims (19, 20, 21, 22, 23, 24)
-
Specification