On Space-Time Block-Encoded 16-APSK in Aeronautical Mobile Telemetry

The two-antenna problem in aeronautical mobile telemetry is created by the reception of two copies same RF waveform with different phases and time delays. Alamouti Alamouti-like space block codes can solve problem, but decoder/detector needs to account for delays between signals received from transmit antennas. This paper compares performance space-time time-reversed 16-APSK problem. maximum likelihood Alamouti-encoded a sequence detector operating on trellis large number states. A practical state-reduction technique presented that produces 256 states small loss bit error rate performance. requires only manipulations pulse shape matched filtering case where channels are simple simplified no detectable