Patent ID: 11956185
Assignee: CORNING RESEARCH & DEVELOPMENT CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A method of synchronizing time-division duplexed (TDD) downlink and uplink communications in a distributed communications system (DCS), comprising:
receiving a TDD downlink communications signal formatted for a TDD communication frame comprising a TDD downlink time period and a TDD uplink time period on a TDD downlink communications link;
detecting a noise signal level on the TDD downlink communications link over a defined duration of the TDD communication frame that covers at least a portion of the TDD uplink time period;
setting a noise threshold floor level for the TDD downlink communications link based on the detected noise signal level in the TDD uplink time period of the TDD communication frame;
detecting the TDD downlink communications signal exceeding the noise threshold floor level; and
detecting the TDD downlink time period in the TDD communication frame based on the detect the TDD downlink communications signal exceeding the noise threshold floor level; and
passing the detected TDD downlink communications signal exceeding the noise threshold floor level to an input/output node during the detected TDD downlink time period.