Spectrally efficient TDM duplex communication system
Patent 5001703 Issued on March 19, 1991. Estimated Expiration Date: 
January 23, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 23, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod and apparatus for four-wire type transmission of digital message signals Full-duplex split-speed data communication unit for remote DTE TDMA communications apparatus having adaptive burst duration TDM communication system for efficient spectrum utilization Method and system for bidirectionally transmitting data Patent #: 4841521 InventorsAssigneeApplicationNo. 300993 filed on 01/23/1989US Classes:370/280, Time division370/347, Multiple access (e.g., TDMA)375/217Muting circuit and squelchExaminersPrimary: Olms, Douglas W.Assistant: Jung, Min International ClassesH04J 003/16H04J 003/14 AbstractAn improved duplex time division multiplexed (TDM) communication system is provided while conserving spectrum and efficiency. To accommodate two voice signals on one channel, the time allocated in a channel for brief listener voice acknowledgements is short; the time allocated for talker transmission is long. Moreover, the coding rate for the listener is slower than for the talker. The slot allocation can be switched whereby whoever is the dominant talker will maintain the longer slot. | |
