SBIR-STTR Award

Using word-stuffing technique, a smart mux can be developed to allow multiplexing of telemetry and other high-speed data streams (over 1.544 Mbps) for trnsmission over digital microwave systems utiliting two or more T1 lines and/or at the DS-2 level. Input data sequence is formatting into I-bit channel word. Channel word is then transmitted once in each data frame. By adjusting the word rate, together with word-stuffing, the MUX can operate at variable input data rates.

Many military communication systems require transmitting data at non-standard rates up to 2.2 Mbps. A smart-mux can be developed to allow multiplexing of telemetry and other high-speed data streams (at data rates between 600 Kbps and 2.2 Mbps) for transmission over existing digital microwave systems utilizing two or more T1 lines and/or at the DS-2 level. Innovative word-stuffing technique and advance synchronization method are used in the proposed design in which the input data sequence is formatted into channel word. Channel word is then transmitted once in each data frame of the transmitting data stream. By adjusting the word rate, together with word-stuffing, the MUX can operate at variable input data rates. The smart MUX concept developed by the air force has been analyzed during the phase I study and shown to be feasible with relative simple hardware design. Two engineering units are proposed as phase II effort to demonstrate and test in the existing microwave radio system in eglin AFB, FL for the duration of 12 months.