Real FIR

Data Structures
struct	msp_fir_q15_params
	Parameter structure for FIR filter. More...
struct	msp_fir_iq31_params
	Parameter structure for FIR filter. More...

Functions
msp_status	msp_fir_q15 (const msp_fir_q15_params *params, const _q15 *src, _q15 *dst)
	Discrete-time convolution of a source vector with real coefficients to apply an FIR filter. More...
msp_status	msp_fir_iq31 (const msp_fir_iq31_params *params, const _iq31 *src, _iq31 *dst)
	Discrete-time convolution of a source vector with real coefficients to apply an FIR filter. More...

Detailed Description

Functions for performing real Finite Impulse Response (FIR) filters.

Function Documentation

msp_status msp_fir_iq31	(	const msp_fir_iq31_params *	params,
		const _iq31 *	src,
		_iq31 *	dst
	)

Discrete-time convolution of a source vector with real coefficients to apply an FIR filter.

Details

FIR filter implementation utilizing discrete-time convolution. IQ31 multiplication is performed with a 32-bit accumulator to avoid intermediate overflow.

Pseudo code

dst = conv([stateBuffer, src], taps)(0:1:length)

Parameters

params	Pointer to the FIR parameter structure.
src	Pointer to the source vector to filter.
dst	Pointer to the destination vector.

Returns

Status of the operation.

msp_status msp_fir_q15	(	const msp_fir_q15_params *	params,
		const _q15 *	src,
		_q15 *	dst
	)

Discrete-time convolution of a source vector with real coefficients to apply an FIR filter.

Details

FIR filter implementation utilizing discrete-time convolution. Q15 multiplication is performed with a 32-bit accumulator to avoid intermediate overflow.

Pseudo code

dst = conv([stateBuffer, src], taps)(0:1:length)

Parameters

params	Pointer to the FIR parameter structure.
src	Pointer to the source vector to filter.
dst	Pointer to the destination vector.

Returns

Status of the operation.