Complex Conjugate

Collaboration diagram for Complex Conjugate:

Functions
void	tpt_cmplx_conj_f32 (f32_t *__restrict aOutData, const f32_t *__restrict aInData, uint32_t aCount)
	Floating-point complex conjugate. More...
void	tpt_cmplx_conj_q15 (q15_t *__restrict aOutData, const q15_t *__restrict aInData, uint32_t aCount)
	Q15 complex conjugate. More...
void	tpt_cmplx_conj_q31 (q31_t *__restrict aOutData, const q31_t *__restrict aInData, uint32_t aCount)
	Q31 complex conjugate. More...

Detailed Description

Conjugates the elements of a complex data vector.

The aInData points to the source data and aOutData points to the destination data where the result should be written. aCount specifies the number of complex samples and the data <in each array is stored in an interleaved fashion (real, imag, real, imag, ...). Each array has a total of 2*aCount values.

The underlying algorithm is used:

    for (n = 0; n < aCount; n++)
    {
      aOutData[2 * n + 0] =  aInData[2 * n + 0]; // real part
      aOutData[2 * n + 1] = -aInData[2 * n + 1]; // imag part
    }
  

There are separate functions for floating-point, Q15, and Q31 data types.

Function Documentation

tpt_cmplx_conj_f32()

void tpt_cmplx_conj_f32	(	f32_t *__restrict	aOutData,
		const f32_t *__restrict	aInData,
		uint32_t	aCount
	)

Floating-point complex conjugate.

Parameters

[out]	aOutData	points to the output vector.
[in]	aInData	points to the input vector.
[in]	aCount	number of samples in each vector

Returns

none

tpt_cmplx_conj_q15()

void tpt_cmplx_conj_q15	(	q15_t *__restrict	aOutData,
		const q15_t *__restrict	aInData,
		uint32_t	aCount
	)

Q15 complex conjugate.

Parameters

[out]	aOutData	points to the output vector.
[in]	aInData	points to the input vector.
[in]	aCount	number of samples in each vector

Returns

none

Scaling and Overflow Behavior

The function uses saturating arithmetic. Results outside of the allowable Q15 range [0x8000 0x7FFF] are saturated.

tpt_cmplx_conj_q31()

void tpt_cmplx_conj_q31	(	q31_t *__restrict	aOutData,
		const q31_t *__restrict	aInData,
		uint32_t	aCount
	)

Q31 complex conjugate.

Parameters

[out]	aOutData	points to the output vector.
[in]	aInData	points to the input vector.
[in]	aCount	number of samples in each vector

Returns

none

Scaling and Overflow Behavior

The function uses saturating arithmetic. Results outside of the allowable Q31 range [0x80000000 0x7FFFFFFF] are saturated.