Abstract: One example includes a troposcatter communication terminal. The terminal includes an antenna comprising a plurality of communication ports that extend from a rear side of the antenna to a front side of the antenna. The terminal also includes a positioner mechanically coupled to the antenna and being configured to mechanically control positioning of the antenna. The terminal further includes an electronics package mechanically coupled to the rear side of the antenna. The electronics package includes a troposcatter radio communicatively coupled to the antenna via the plurality of communications ports to transmit and receive troposcatter communication signals via the plurality of communication ports at the front side of the antenna.

Abstract: One example includes an ACM transceiver system. An ACM transceiver system includes an ACM controller configured to receive a reported signal-to-noise ratio (SNR) via each of a plurality of return signals corresponding to a respective plurality of transmit signals that were each sequentially previously transmitted from the ACM transceiver system in a respective modulation and coding scheme (MODCOD). The reported SNR via a given one of the plurality of return signals corresponds to the respective one of the plurality of transmit signals. The ACM controller continuously generates an adaptive SNR threshold associated with each of the plurality of MODCODS based on the reported SNR delivered by the received plurality of return signals, and compares the reported SNR with the adaptive SNR threshold of each of the plurality of MODCODS to select one of the plurality of MODCODS for transmission of a next transmit signal.

Abstract: A transmitter/receiver apparatus and method provide adaptive data rate fading compensation that utilize dual-polarization transmissions at a constant modulation-symbol rate over a forward-scatter radio link and that employ adaptive receiver techniques that operate efficiently at the noisy uncoded signal-to-noise ratio threshold of present-day forward-error correction codes over the range of multipath widths in such forward-scatter environments. The dual-polarization transmissions support both dual transmission and dual diversity configurations. The adaptive receiver techniques include adaptive channel matched filtering and adaptive equalizing at the modulation-symbol rate.