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22 #ifndef INCLUDED_GR_FXPT_NCO_H
23 #define INCLUDED_GR_FXPT_NCO_H
26 #include <gr_complex.h>
29 * \brief Numerically Controlled Oscillator (NCO)
36 gr_fxpt_nco () : d_phase (0), d_phase_inc (0) {}
41 void set_phase (float angle) {
42 d_phase = gr_fxpt::float_to_fixed (angle);
45 void adjust_phase (float delta_phase) {
46 d_phase += gr_fxpt::float_to_fixed (delta_phase);
49 // angle_rate is in radians / step
50 void set_freq (float angle_rate){
51 d_phase_inc = gr_fxpt::float_to_fixed (angle_rate);
54 // angle_rate is a delta in radians / step
55 void adjust_freq (float delta_angle_rate)
57 d_phase_inc += gr_fxpt::float_to_fixed (delta_angle_rate);
60 // increment current phase angle
64 d_phase += d_phase_inc;
69 d_phase += d_phase_inc * n;
72 // units are radians / step
73 float get_phase () const { return gr_fxpt::fixed_to_float (d_phase); }
74 float get_freq () const { return gr_fxpt::fixed_to_float (d_phase_inc); }
76 // compute sin and cos for current phase angle
77 void sincos (float *sinx, float *cosx) const
79 *sinx = gr_fxpt::sin (d_phase);
80 *cosx = gr_fxpt::cos (d_phase);
83 // compute cos and sin for a block of phase angles
84 void sincos (gr_complex *output, int noutput_items, double ampl=1.0)
86 for (int i = 0; i < noutput_items; i++){
87 output[i] = gr_complex(gr_fxpt::cos (d_phase) * ampl, gr_fxpt::sin (d_phase) * ampl);
92 // compute sin for a block of phase angles
93 void sin (float *output, int noutput_items, double ampl=1.0)
95 for (int i = 0; i < noutput_items; i++){
96 output[i] = (float)(gr_fxpt::sin (d_phase) * ampl);
101 // compute cos for a block of phase angles
102 void cos (float *output, int noutput_items, double ampl=1.0)
104 for (int i = 0; i < noutput_items; i++){
105 output[i] = (float)(gr_fxpt::cos (d_phase) * ampl);
110 // compute sin for a block of phase angles
111 void sin (short *output, int noutput_items, double ampl=1.0)
113 for (int i = 0; i < noutput_items; i++){
114 output[i] = (short)(gr_fxpt::sin (d_phase) * ampl);
119 // compute cos for a block of phase angles
120 void cos (short *output, int noutput_items, double ampl=1.0)
122 for (int i = 0; i < noutput_items; i++){
123 output[i] = (short)(gr_fxpt::cos (d_phase) * ampl);
128 // compute sin for a block of phase angles
129 void sin (int *output, int noutput_items, double ampl=1.0)
131 for (int i = 0; i < noutput_items; i++){
132 output[i] = (int)(gr_fxpt::sin (d_phase) * ampl);
137 // compute cos for a block of phase angles
138 void cos (int *output, int noutput_items, double ampl=1.0)
140 for (int i = 0; i < noutput_items; i++){
141 output[i] = (int)(gr_fxpt::cos (d_phase) * ampl);
146 // compute cos or sin for current phase angle
147 float cos () const { return gr_fxpt::cos (d_phase); }
148 float sin () const { return gr_fxpt::sin (d_phase); }
151 #endif /* INCLUDED_GR_FXPT_NCO_H */