DSPLIB - Signal generation

All the signal generation functions currently supported by the DSP library.

• Periodic
  • Cosinusoidal
  • Sinusoidal
  • Square
  • Rectangular
  • Saw tooth
  • Dirac comb
• Non-periodic
  • Noise
  • Ramp
  • Step
  • Dirac

---

Sinusoidal

This function generates a sinusoidal signal with a specified frequency, sampling frequency and phase.

Note

The amplitude of the signal fits in the range [-1; 1].

The phase is scaled to fit in the range [-1; 1], where -1 corresponds to -pi and 1 to pi.

Relative functions:

• dsp16_gen_sin
• dsp32_gen_sin

---

Cosinusoidal

This function generates a cosinusoidal signal with a specified frequency, sampling frequency and phase.

Note

The amplitude of the signal fits in the range [-1; 1].

The phase is scaled to fit in the range [-1; 1], where -1 corresponds to -pi and 1 to pi.

Relative functions:

• dsp16_gen_cos
• dsp32_gen_cos

---

Noise

This function generates a noise with a specified amplitude.

Note

The amplitude of the signal fits in the range [-1; 1].

Relative functions:

• dsp16_gen_noise
• dsp32_gen_noise

---

Rectangular

This function generates a rectangular signal.

Note

The amplitude of the signal fits in the range [-1; 1].

Relative functions:

• dsp16_gen_rect
• dsp32_gen_rect

---

Square

This function generates a square signal.

Note

The amplitude of the signal fits in the range [-1; 1].

Relative functions:

• dsp16_gen_sqr
• dsp32_gen_sqr

---

Saw tooth

This function generates a saw tooth signal.

Note

The amplitude of the signal fits in the range [-1; 1].

Relative functions:

• dsp16_gen_saw
• dsp32_gen_saw

---

Dirac comb

This function generates a dirac comb signal.

Note

The amplitude of the signal fits in the range [0; 1].

Relative functions:

• dsp16_gen_dcomb
• dsp32_gen_dcomb

---

Ramp

This function generates a ramp.

Note

The amplitude of the signal fits in the range [0; 1].

Relative functions:

• dsp16_gen_ramp
• dsp32_gen_ramp

---

Step

This function generates a step.

Relative functions:

• dsp16_gen_step
• dsp32_gen_step

---

Dirac

This function generates a dirac.

Note

The amplitude of the signal fits in the range [0; 1].

Relative functions:

• dsp16_gen_dirac
• dsp32_gen_dirac

---

Functions
dsp16_t	dsp16_gen_cos (dsp16_t *vect1, int size, int f, int fs, dsp16_t phase)
	16-bit fixed point version of the cosinusoidal signal generation. More...
void	dsp16_gen_dcomb (dsp16_t *vect1, int size, int f, int fs, dsp16_t delay)
	16-bit fixed point version of the dirac comb signal generation. More...
void	dsp16_gen_dirac (dsp16_t *vect1, int size, int dirac_index)
	16-bit fixed point version of the dirac comb signal generation. More...
void	dsp16_gen_noise (dsp16_t *vect1, int size, dsp16_t amp)
	16-bit fixed point version of the noise generation. More...
void	dsp16_gen_ramp (dsp16_t *vect1, int size, dsp16_t increment)
	16-bit fixed point version of the ramp signal generation. More...
void	dsp16_gen_rect (dsp16_t *vect1, int size, int f, int fs, dsp16_t duty, dsp16_t delay)
	16-bit fixed point version of the rectangular signal generation. More...
dsp16_t	dsp16_gen_saw (dsp16_t *vect1, int size, int f, int fs, dsp16_t duty, dsp16_t delay)
	16-bit fixed point version of the saw tooth signal generation. More...
dsp16_t	dsp16_gen_sin (dsp16_t *vect1, int size, int f, int fs, dsp16_t phase)
	16-bit fixed point version of the sinusoidal signal generation. More...
static void	dsp16_gen_sqr (dsp16_t *vect1, int size, int f, int fs, dsp16_t delay)
	16-bit fixed point version of the square signal generation. More...
void	dsp16_gen_step (dsp16_t *vect1, int size, dsp16_t intial_value, dsp16_t final_value, int step_index)
	16-bit fixed point version of the dirac comb signal generation. More...
dsp32_t	dsp32_gen_cos (dsp32_t *vect1, int size, int f, int fs, dsp32_t phase)
	32-bit fixed point version of the cosinusoidal signal generation. More...
void	dsp32_gen_dcomb (dsp32_t *vect1, int size, int f, int fs, dsp32_t delay)
	32-bit fixed point version of the dirac comb signal generation. More...
void	dsp32_gen_dirac (dsp32_t *vect1, int size, int dirac_index)
	32-bit fixed point version of the dirac comb signal generation. More...
void	dsp32_gen_noise (dsp32_t *vect1, int size, dsp32_t amp)
	32-bit fixed point version of the noise generation. More...
void	dsp32_gen_ramp (dsp32_t *vect1, int size, dsp32_t increment)
	32-bit fixed point version of the ramp signal generation. More...
void	dsp32_gen_rect (dsp32_t *vect1, int size, int f, int fs, dsp32_t duty, dsp32_t delay)
	32-bit fixed point version of the rectangular signal generation. More...
dsp32_t	dsp32_gen_saw (dsp32_t *vect1, int size, int f, int fs, dsp32_t duty, dsp32_t delay)
	32-bit fixed point version of the saw tooth signal generation. More...
dsp32_t	dsp32_gen_sin (dsp32_t *vect1, int size, int f, int fs, dsp32_t phase)
	32-bit fixed point version of the sinusoidal signal generation. More...
static void	dsp32_gen_sqr (dsp32_t *vect1, int size, int f, int fs, dsp32_t delay)
	32-bit fixed point version of the square signal generation. More...
void	dsp32_gen_step (dsp32_t *vect1, int size, dsp32_t intial_value, dsp32_t final_value, int step_index)
	32-bit fixed point version of the dirac comb signal generation. More...

dsp16_t dsp16_gen_cos	(	dsp16_t *	vect1,
		int	size,
		int	f,
		int	fs,
		dsp16_t	phase
	)

16-bit fixed point version of the cosinusoidal signal generation.

Parameters

vect1	A pointer on a 16-bit vector which is the output buffer of this function.
size	The number of elements of the output vector.
f	The frequency of the output signal.
fs	The sampling frequency of the output signal.
phase	The phase of the output signal.

Returns

The phase of the signal generated.

References dsp16_op_cos(), and DSP16_QB.

void dsp16_gen_dcomb	(	dsp16_t *	vect1,
		int	size,
		int	f,
		int	fs,
		dsp16_t	delay
	)

16-bit fixed point version of the dirac comb signal generation.

Parameters

vect1	A pointer on a 16-bit vector which is the output buffer of this function.
size	The number of elements of the output vector.
f	The frequency of the output signal.
fs	The sampling frequency of the output signal.
delay	The delay of the periodic waveform. The delay must feet in the range [0; 1] where 1 to T.

References DSP16_Q, DSP16_QB, and MIN.

void dsp16_gen_dirac	(	dsp16_t *	vect1,
		int	size,
		int	dirac_index
	)

16-bit fixed point version of the dirac comb signal generation.

Parameters

vect1	A pointer on a 16-bit vector which is the output buffer of this function.
size	The number of elements of the output vector.
dirac_index	The index in the buffer, where the dirac appears.

References DSP16_Q, and dsp16_vect_zeropad().

void dsp16_gen_noise	(	dsp16_t *	vect1,
		int	size,
		dsp16_t	amp
	)

16-bit fixed point version of the noise generation.

Parameters

vect1	A pointer on a 16-bit vector which is the output buffer of this function.
size	The number of elements of the output vector.
amp	The amplitude of the signal.

References dsp16_op_rand(), DSP16_Q, and DSP16_QB.

void dsp16_gen_ramp	(	dsp16_t *	vect1,
		int	size,
		dsp16_t	increment
	)

16-bit fixed point version of the ramp signal generation.

Parameters

vect1	A pointer on a 16-bit vector which is the output buffer of this function.
size	The number of elements of the output vector.
increment	The incrementation of the signal per vector's element.

References DSP16_Q.

void dsp16_gen_rect	(	dsp16_t *	vect1,
		int	size,
		int	f,
		int	fs,
		dsp16_t	duty,
		dsp16_t	delay
	)

16-bit fixed point version of the rectangular signal generation.

Parameters

vect1	A pointer on a 16-bit vector which is the output buffer of this function.
size	The number of elements of the output vector.
f	The frequency of the output signal.
fs	The sampling frequency of the output signal.
duty	The duty cycle of the output signal. The duty cycle is a number in the range ]0; 1] which is the ratio between the pulse duration and the period of the waveform.
delay	The delay of the periodic waveform. The delay must feet in the range [0; 1] where 1 to T.

References DSP16_Q, DSP16_QB, and MIN.

Referenced by dsp16_gen_sqr().

dsp16_t dsp16_gen_saw	(	dsp16_t *	vect1,
		int	size,
		int	f,
		int	fs,
		dsp16_t	duty,
		dsp16_t	delay
	)

16-bit fixed point version of the saw tooth signal generation.

Parameters

vect1	A pointer on a 16-bit vector which is the output buffer of this function.
size	The number of elements of the output vector.
f	The frequency of the output signal.
fs	The sampling frequency of the output signal.
duty	The duty cycle of the output signal. The duty cycle is a number in the range ]0; 1] which is the ratio between the pulse duration and the period of the waveform.
delay	The delay of the periodic waveform. The delay must feet in the range [0; 1] where 1 to T.

Returns

The phase of the signal generated.

References DSP16_Q, DSP16_QB, Max, and Min.

dsp16_t dsp16_gen_sin	(	dsp16_t *	vect1,
		int	size,
		int	f,
		int	fs,
		dsp16_t	phase
	)

16-bit fixed point version of the sinusoidal signal generation.

Parameters

vect1	A pointer on a 16-bit vector which is the output buffer of this function.
size	The number of elements of the output vector.
f	The frequency of the output signal.
fs	The sampling frequency of the output signal.
phase	The phase of the output signal.

Returns

The phase of the signal generated.

References dsp16_op_sin(), and DSP16_QB.

Referenced by main().

static void dsp16_gen_sqr ( dsp16_t *  vect1, int  size, int  f, int  fs, dsp16_t  delay  )

inlinestatic

16-bit fixed point version of the square signal generation.

Parameters

vect1	A pointer on a 16-bit vector which is the output buffer of this function.
size	The number of elements of the output vector.
f	The frequency of the output signal.
fs	The sampling frequency of the output signal.
delay	The delay of the periodic waveform. The delay must feet in the range [0; 1] where 1 to T.

References dsp16_gen_rect(), and DSP16_Q.

void dsp16_gen_step	(	dsp16_t *	vect1,
		int	size,
		dsp16_t	intial_value,
		dsp16_t	final_value,
		int	step_index
	)

16-bit fixed point version of the dirac comb signal generation.

Parameters

vect1	A pointer on a 16-bit vector which is the output buffer of this function.
size	The number of elements of the output vector.
intial_value	The initial value of the signal.
final_value	The final value of the signal.
step_index	The index in the buffer, where the step appears.

dsp32_t dsp32_gen_cos	(	dsp32_t *	vect1,
		int	size,
		int	f,
		int	fs,
		dsp32_t	phase
	)

32-bit fixed point version of the cosinusoidal signal generation.

Parameters

vect1	A pointer on a 32-bit vector which is the output buffer of this function.
size	The number of elements of the output vector.
f	The frequency of the output signal.
fs	The sampling frequency of the output signal.
phase	The phase of the output signal.

Returns

The phase of the signal generated.

References dsp32_op_cos(), and DSP32_QB.

void dsp32_gen_dcomb	(	dsp32_t *	vect1,
		int	size,
		int	f,
		int	fs,
		dsp32_t	delay
	)

32-bit fixed point version of the dirac comb signal generation.

Parameters

vect1	A pointer on a 32-bit vector which is the output buffer of this function.
size	The number of elements of the output vector.
f	The frequency of the output signal.
fs	The sampling frequency of the output signal.
delay	The delay of the periodic waveform. The delay must feet in the range [0; 1] where 1 to T.

References DSP32_Q, DSP32_QB, and MIN.

void dsp32_gen_dirac	(	dsp32_t *	vect1,
		int	size,
		int	dirac_index
	)

32-bit fixed point version of the dirac comb signal generation.

Parameters

vect1	A pointer on a 32-bit vector which is the output buffer of this function.
size	The number of elements of the output vector.
dirac_index	The index in the buffer, where the dirac appears.

References DSP32_Q, and dsp32_vect_zeropad().

void dsp32_gen_noise	(	dsp32_t *	vect1,
		int	size,
		dsp32_t	amp
	)

32-bit fixed point version of the noise generation.

Parameters

vect1	A pointer on a 32-bit vector which is the output buffer of this function.
size	The number of elements of the output vector.
amp	The amplitude of the signal.

References dsp32_op_rand(), DSP32_Q, and DSP32_QB.

void dsp32_gen_ramp	(	dsp32_t *	vect1,
		int	size,
		dsp32_t	increment
	)

32-bit fixed point version of the ramp signal generation.

Parameters

vect1	A pointer on a 32-bit vector which is the output buffer of this function.
size	The number of elements of the output vector.
increment	The incrementation of the signal per vector's element.

References DSP32_Q.

void dsp32_gen_rect	(	dsp32_t *	vect1,
		int	size,
		int	f,
		int	fs,
		dsp32_t	duty,
		dsp32_t	delay
	)

32-bit fixed point version of the rectangular signal generation.

Parameters

vect1	A pointer on a 32-bit vector which is the output buffer of this function.
size	The number of elements of the output vector.
f	The frequency of the output signal.
fs	The sampling frequency of the output signal.
duty	The duty cycle of the output signal. The duty cycle is a number in the range ]0; 1] which is the ratio between the pulse duration and the period of the waveform.
delay	The delay of the periodic waveform. The delay must feet in the range [0; 1] where 1 to T.

References DSP32_Q, DSP32_QB, and MIN.

Referenced by dsp32_gen_sqr().

dsp32_t dsp32_gen_saw	(	dsp32_t *	vect1,
		int	size,
		int	f,
		int	fs,
		dsp32_t	duty,
		dsp32_t	delay
	)

32-bit fixed point version of the saw tooth signal generation.

Parameters

vect1	A pointer on a 32-bit vector which is the output buffer of this function.
size	The number of elements of the output vector.
f	The frequency of the output signal.
fs	The sampling frequency of the output signal.
duty	The duty cycle of the output signal. The duty cycle is a number in the range ]0; 1] which is the ratio between the pulse duration and the period of the waveform.
delay	The delay of the periodic waveform. The delay must feet in the range [0; 1] where 1 to T.

Returns

The phase of the signal generated.

References DSP32_Q, DSP32_QB, Max, and Min.

dsp32_t dsp32_gen_sin	(	dsp32_t *	vect1,
		int	size,
		int	f,
		int	fs,
		dsp32_t	phase
	)

32-bit fixed point version of the sinusoidal signal generation.

Parameters

vect1	A pointer on a 32-bit vector which is the output buffer of this function.
size	The number of elements of the output vector.
f	The frequency of the output signal.
fs	The sampling frequency of the output signal.
phase	The phase of the output signal.

Returns

The phase of the signal generated.

References dsp32_op_sin(), and DSP32_QB.

static void dsp32_gen_sqr ( dsp32_t *  vect1, int  size, int  f, int  fs, dsp32_t  delay  )

inlinestatic

32-bit fixed point version of the square signal generation.

Parameters

vect1	A pointer on a 32-bit vector which is the output buffer of this function.
size	The number of elements of the output vector.
f	The frequency of the output signal.
fs	The sampling frequency of the output signal.
delay	The delay of the periodic waveform. The delay must feet in the range [0; 1] where 1 to T.

References dsp32_gen_rect(), and DSP32_Q.

void dsp32_gen_step	(	dsp32_t *	vect1,
		int	size,
		dsp32_t	intial_value,
		dsp32_t	final_value,
		int	step_index
	)

32-bit fixed point version of the dirac comb signal generation.

Parameters

vect1	A pointer on a 32-bit vector which is the output buffer of this function.
size	The number of elements of the output vector.
intial_value	The initial value of the signal.
final_value	The final value of the signal.
step_index	The index in the buffer, where the step appears.