Performance of turbo coded BPSK for an aeronautical channel

Abstract

In this paper, we present the results of using a turbo decoder to retrieve a serially encoded data stream, which has been transmitted over a multipath channel. The transmitted data streams are Binary Phase Shift Keying (BPSK) modulated signals, which are encoded using two rate one-half (1/2) recursive systematic convolutional (RSC) encoders, and then transmitted over the channel. An aeronautical channel is very fast fading and time varying, and it has been modeled as an FIR filter with complex channel gains determined by Doppler and the multipath. At the receiver, we utilize turbo decoding to estimate the effect of the channel on the transmitted data. Simulation results are provided comparing the bit error rates of Turbo decoded BPSK to that of un-coded BPSK sent over an A WGN and a time-invariant multipath channel.