Patent ID: 9748906
Date: 2017-08-29
CPC Classifications: H03F,H04B,H04L,H04W

Claim:
1. A distributed antenna system comprising: a host unit; and at least one remote antenna unit that is communicatively coupled to the host unit, the at least one remote antenna unit including at least one processing unit, at least one downstream signal branch, and at least one upstream signal branch; wherein the host unit is configured to communicate a downstream transport signal from the host unit to the remote antenna unit; wherein the remote antenna unit to which the downstream transport signal is communicated uses the processing unit and the downstream signal branch to generate a downstream radio frequency signal for radiation from an antenna associated with the remote antenna unit from the downstream transport signal; wherein the remote antenna unit is configured to communicate an upstream transport signal from the remote antenna unit to the host unit; wherein the upstream transport signal is generated from a received upstream radio frequency signal received at the remote antenna unit using the at least one processing unit and the at least one upstream signal branch, wherein the upstream signal includes a digital representation of the received upstream radio frequency signal; and a feedback path configured to digitize the downstream radio frequency signal to provide a digital representation of the downstream radio frequency signal radiated from the antenna to the at least one processing unit; wherein the remote antenna unit is configured to pre-distort an input signal to the downstream signal branch for non-linearities in the downstream signal branch using the digital representation of the downstream radio frequency signal radiated from the antenna as received from the feedback path; wherein the remote antenna unit is configured to perform self-interference suppression processing in an upstream signal path by digitally subtracting the digital representation of the downstream radio frequency signal radiated from the antenna from the digital representation of the received upstream radio frequency signal as received from the feedback path.