SciLabによるウェーバー方式SSBのシミュレーション
function [y]=weaverssb(x) // Weaver style SSB generator for SciLab // by Suikan. 2006 // create complex local oscillator. 1.5kHz assuming 48kSamples/sec [n,c]=size(x); lo = exp(%i*[1:c]*2*%pi*1.5/48) // create 0..1.2kHz LPF at 48kSamples/sec // this filter is transposed. taps = 511; thn=eqfir( taps, [0 1.2/48; 1.5/48 0.5], [1 0], [0.01 1] )'; // down convert input data by -1.5kHz tmp1 = x .* conj(lo); y = [0 0]; // Do real LPF (complex BPF) by FIR filter for k=1:1:c-taps; y(1,k+taps) = tmp1(k:(k+taps-1)) * thn; end // up convert by 1.5kHz y = y .* lo; endfunction