asptRdrnlms32f

API Summary

• DT32S rdrnlms32fInit (asptRdrnlms32f *rdrnlms,DT32S L, DT32F mu, DT32S R)
  
• DT32S rdrnlms32fInitStatic(asptRdrnlms32f *rdrnlms,DT32S L, DT32F mu, DT32S R, DT32F *pCof, DT32F *pDat)
  
• void rdrnlms32fFree(asptRdrnlms32f *rdrnlms)
  

• DT32F rdrnlms32fFilterUpdate(asptRdrnlms32f *rdrnlms, DT32F inp, DT32F des)
  
• DT32F rdrnlms32fFilterOnly(asptRdrnlms32f *rdrnlms, DT32F inp)
  
• DT32F rdrnlms32fLCFilterUpdate(asptRdrnlms32f *rdrnlms, DT32F des)
  
• DT32F rdrnlms32fLCFilterOnly(asptRdrnlms32f *rdrnlms)
  

• DT32S rdrnlms32fGetCoef(asptRdrnlms32f *rdrnlms, DT32F *buf, DT32S ind, DT32S N, DT32S flip)
  
• DT32S rdrnlms32fGetDelayLine(asptRdrnlms32f *rdrnlms, DT32F *buf, DT32S ind, DT32S N, DT32S flip)
  
• rdrnlms32fGetCoefPtr( asptRdrnlms32f *rdrnlms )
• rdrnlms32fGetFilterLength( asptRdrnlms32f *rdrnlms )
• rdrnlms32fGetDelayLineLength( asptRdrnlms32f *rdrnlms )
• rdrnlms32fGetLastErrorSample( asptRdrnlms32f *rdrnlms )
• rdrnlms32fGetStepSize( asptRdrnlms32f *rdrnlms )
• rdrnlms32fGetReuseNr( asptRdrnlms32f *rdrnlms )

• DT32S rdrnlms32fReset(asptRdrnlms32f *rdrnlms)
  
• DT32S rdrnlms32fResetDelayLine(asptRdrnlms32f *rdrnlms)
  
• DT32S rdrnlms32fResize(asptRdrnlms32f *rdrnlms, DT32S newLength)
  
• DT32S rdrnlms32fSetCoef(asptRdrnlms32f *rdrnlms, DT32F *newCoef, DT32S ind, DT32S N, DT32S flip)
  
• DT32S rdrnlms32fSetDelayLine(asptRdrnlms32f *rdrnlms, DT32F *newCoef, DT32S ind, DT32S N, DT32S flip)
  
• rdrnlms32fSetStepSize( asptRdrnlms32f *rdrnlms, newStep )

Description

Copyright

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rdrnlms32fInit

DT32S rdrnlms32fInit (asptRdrnlms32f *rdrnlms,DT32S L, DT32F mu, DT32S R)

Initializes an asptRdrnlms32f filter and allocates its necessary storage buffers.
• Returns :
  • Error code. On failure, the filterLength member of the filter is set to zero.
• Input Parameters :
  • rdrnlms : asptRdrnlms32f filter to be initialized
  • L : number of filter coefficients
  • mu : step size
  • R : number of data reusing cycles; R=0 is the LMS case
• Error Conditions
  • ASPT_NO_ERR : Initialization is successful
  • ASPT_RANGE_ERR : L/R is not a valid input value
  • ASPT_NO_MEM_ERR : could not allocate memory

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rdrnlms32fInitStatic

DT32S rdrnlms32fInitStatic(asptRdrnlms32f *rdrnlms,DT32S L, DT32F mu, DT32S R, DT32F *pCof, DT32F *pDat)

Initializes an asptRdrnlms32f filter to use pre-allocated memory.
• Returns :
  • Error code. On failure, the filterLength member of the filter is set to zero.
• Input Parameters :
  • rdrnlms : asptRdrnlms32f filter to be initialized
  • L : number of filter coefficients
  • mu : step size
  • R : number of data reusing cycles; R=0 is the LMS case
  • pCof : pointer to a pre-allocated memory block to be used for the adaptive filter coefficients. At least L memory locations must be available starting at this memory address.
  • pDat : pointer to a pre-allocated memory block to be used for data storage. At least L+2*R+1 memory locations must be available starting at this memory address
• Error Conditions
  • ASPT_NO_ERR : Initialization is successful
  • ASPT_NULL_PTR_ERR : pCof/pDat is a NULL pointer
  • ASPT_RANGE_ERR : L/R is not a valid input value
  • ASPT_NO_MEM_ERR : could not allocate memory

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rdrnlms32fFilterUpdate

DT32F rdrnlms32fFilterUpdate(asptRdrnlms32f *rdrnlms, DT32F inp, DT32F des)

Calculates the filter output and updates the coefficients vector according to the RDRNLMS algorithm.
• Returns :
  • The filter output sample.
• Input Parameters :
  • rdrnlms : pointer to the asptRdrnlms32f filter
  • inp : new input sample.
  • des : new desired sample
• Remarks :
  • The error sample is stored internally and can be retrieved by calling rdrnlms32fGetLastErrorSample().

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rdrnlms32fFilterOnly

DT32F rdrnlms32fFilterOnly(asptRdrnlms32f *rdrnlms, DT32F inp)

Calculates the filter output but does not updates the coefficients. It also updates the power estimate of the input signal.
• Returns :
  • The filter output sample.
• Input Parameters :
  • rdrnlms : pointer to the asptRdrnlms32f filter
  • inp : new input sample.
• Remarks :
  • error sample is not calculated.

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rdrnlms32fLCFilterUpdate

DT32F rdrnlms32fLCFilterUpdate(asptRdrnlms32f *rdrnlms, DT32F des)

Calculates the filter output and updates the coefficients vector according to the RDRNLMS algorithm for the Linear Combiner filter configuration. Assumes that the delay line is externally updated before calling, therefore does not update the internal delay line.
• Returns :
  • The filter output sample.
• Input Parameters :
  • rdrnlms : pointer to the asptRdrnlms32f filter
  • des : new desired sample
• Remarks :
  • The error sample is stored internally and can be retrieved by calling rdrnlms32fGetLastErrorSample().

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rdrnlms32fLCFilterOnly

DT32F rdrnlms32fLCFilterOnly(asptRdrnlms32f *rdrnlms)

Calculates the filter output but does not updates the coefficients for the Linear Combiner filter configuration. Assumes that the delay line is externally updated before calling, therefore does not update the internal delay line.
• Returns :
  • The filter output sample.
• Input Parameters :
  • rdrnlms : pointer to the asptRdrnlms32f filter
• Remarks :
  • error sample is not calculated.

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rdrnlms32fFree

void rdrnlms32fFree(asptRdrnlms32f *rdrnlms)

Frees the allocated memory for this asptRdrnlms32f filter.
• Returns :
  • void
• Input Parameters :
  • rdrnlms : pointer to the asptRdrnlms32f filter
• Remarks :
  • Use this function only with filters created with rdrnlms32fInit(). Do not use with asptRdrnlms32f filters created using rdrnlms32fInitStatic().

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rdrnlms32fReset

DT32S rdrnlms32fReset(asptRdrnlms32f *rdrnlms)

Resets all filter coefficients to zero.
• Returns :
  • Error code
• Input Parameters :
  • rdrnlms : pointer to asptRdrnlms32f filter to be reset
• Error Conditions
  • ASPT_NO_ERR : success
  • ASPT_NULL_PTR_ERR : NULL pointer error

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rdrnlms32fResetDelayLine

DT32S rdrnlms32fResetDelayLine(asptRdrnlms32f *rdrnlms)

Resets all internal delay lines to zero.
• Returns :
  • Error code
• Input Parameters :
  • rdrnlms : pointer to asptRdrnlms32f filter to be reset
• Error Conditions
  • ASPT_NO_ERR : success
  • ASPT_NULL_PTR_ERR : NULL pointer error

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rdrnlms32fGetCoef

DT32S rdrnlms32fGetCoef(asptRdrnlms32f *rdrnlms, DT32F *buf, DT32S ind, DT32S N, DT32S flip)

Copies N internal filter coefficients starting from coef[ind] to dstBuf.
• Returns :
  • On success returns the number of coefficients copied, otherwise the error code (negative int).
• Input Parameters :
  • rdrnlms : pointer to asptRdrnlms32f filter.
  • dstBuf : destination buffer.
  • ind : index to the first coefficient to be copied.
  • N : number of coefficients to be copied.
  • flip : if not 0, will flip the coefficients order
• Output Parameters :
  • dstBuf is updated
• Error Conditions
  • ASPT_NULL_PTR_ERR : dstBuf/rdrnlms->coef is a NULL pointer
  • ASPT_RANGE_ERR : ind/N is not a valid input value

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rdrnlms32fSetCoef

DT32S rdrnlms32fSetCoef(asptRdrnlms32f *rdrnlms, DT32F *newCoef, DT32S ind, DT32S N, DT32S flip)

Initializes N internal filter coefficients starting from coef[ind] to the contents of newBuf.
• Returns :
  • On success returns the number of coefficients initialized, otherwise the error code (negative int).
• Input Parameters :
  • rdrnlms : pointer to asptRdrnlms32f filter to be set.
  • newCoef : new coefficients vector.
  • ind : index to the first coefficient to be set.
  • N : number of coefficients to be set.
  • flip : if not 0, will copy the coefficients in reverse order
• Output Parameters :
  • rdrnlms->coef is updated
• Error Conditions
  • ASPT_NULL_PTR_ERR : newCoef/rdrnlms->coef is a NULL pointer
  • ASPT_RANGE_ERR : ind/N is not a valid input value

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rdrnlms32fGetDelayLine

DT32S rdrnlms32fGetDelayLine(asptRdrnlms32f *rdrnlms, DT32F *buf, DT32S ind, DT32S N, DT32S flip)

Copies N internal delay line samples starting from delayLine[ind] to dstBuf.
• Returns :
  • On success returns the number of samples copied, otherwise the error code (negative int).
• Input Parameters :
  • rdrnlms : pointer to the asptRdrnlms32f filter.
  • dstBuf : destination buffer.
  • ind : index to the first sample to be copied.
  • N : number of samples to be copied.
  • flip : if not 0, will flip the samples order.
• Output Parameters :
  • dstBuf is updated
• Error Conditions
  • ASPT_NULL_PTR_ERR : dstBuf/rdrnlms->delayLine is a NULL pointer
  • ASPT_RANGE_ERR : ind/N is not a valid input value
• Remarks :
  • Samples are stored in dstBuf with newest sample at index 0, and oldest at index N-1, when flip == 0.

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rdrnlms32fSetDelayLine

DT32S rdrnlms32fSetDelayLine(asptRdrnlms32f *rdrnlms, DT32F *newCoef, DT32S ind, DT32S N, DT32S flip)

Initializes N internal delay line samples starting from delayLine[ind] to the contents of the given array.
• Returns :
  • On success returns the number of samples initialized, otherwise the error code (negative int).
• Input Parameters :
  • rdrnlms : pointer to an asptRdrnlms32f filter.
  • newBuf : new data buffer.
  • ind : index to the first sample to be copied.
  • N : number of samples to be copied.
  • flip : if not 0, will flip the samples order.
• Output Parameters :
  • rdrnlms->delayLine is updated
• Error Conditions
  • ASPT_NULL_PTR_ERR : newBuf/rdrnlms->delayLine is a NULL pointer
  • ASPT_RANGE_ERR : ind/N is not a valid input value
• Remarks :
  • Samples assumed to be stored in newBuf with newest sample at index 0, and oldest at index N-1, when flip == 0.

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rdrnlms32fResize

DT32S rdrnlms32fResize(asptRdrnlms32f *rdrnlms, DT32S newLength)

Resizes an asptRdrnlms32f filter keeping as much of the filter state as possible.
• Returns :
  • Error code.
• Input Parameters :
  • rdrnlms : pointer to the asptRdrnlms32f filter to be resized.
  • newLen : required new filter length.
• Error Conditions
  • ASPT_NO_ERR : Resizing is success
  • ASPT_NULL_PTR_ERR : NULL pointer error
  • ASPT_RANGE_ERR : newLength is not a valid input value
  • ASPT_NO_MEM_ERR : Could not allocate the necessary filter storage
• Remarks :
  • Use this function only with dynamically allocated asptRdrnlms32f filters.