asptRls32f

API Summary

• DT32S rls32fInit (asptRls32f *rls, DT32S L, DT32F mu, DT32F b)
  
• DT32S rls32fInitStatic(asptRls32f *rls, DT32S L, DT32F mu, DT32F b, DT32F *pCof, DT32F *pDat)
  
• void rls32fFree(asptRls32f *rls)
  

• DT32F rls32fFilterUpdate(asptRls32f *rls, DT32F inp, DT32F des)
  
• DT32F rls32fFilterOnly(asptRls32f *rls, DT32F inp)
  
• DT32F rls32fLCFilterUpdate(asptRls32f *rls, DT32F des)
  
• DT32F rls32fLCFilterOnly(asptRls32f *rls)
  

• DT32S rls32fGetCoef(asptRls32f *rls, DT32F *buf, DT32S ind, DT32S N, DT32S flip)
  
• DT32S rls32fGetDelayLine(asptRls32f *rls, DT32F *buf, DT32S ind, DT32S N, DT32S flip)
  
• rls32fGetCoefPtr( asptRls32f *rls )
• rls32fGetFilterLength( asptRls32f *rls )
• rls32fGetDelayLineLength( asptRls32f *rls )
• rls32fGetLastErrorSample( asptRls32f *rls )
• rls32fGetForgetFactor( asptRls32f *rls )

• DT32S rls32fReset(asptRls32f *rls)
  
• DT32S rls32fResetDelayLine(asptRls32f *rls)
  
• DT32S rls32fResize(asptRls32f *rls, DT32S newLength)
  
• DT32S rls32fSetCoef(asptRls32f *rls, DT32F *newCoef, DT32S ind, DT32S N, DT32S flip)
  
• DT32S rls32fSetDelayLine(asptRls32f *rls, DT32F *newCoef, DT32S ind, DT32S N, DT32S flip)
  
• rls32fSetForgetFactor( asptRls32f *rls, newFactor )

Description

Copyright

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rls32fInit

DT32S rls32fInit (asptRls32f *rls, DT32S L, DT32F mu, DT32F b)

Initializes an asptRls32f filter and allocates its necessary storage buffers.
• Returns :
  • Error code. On failure, the filterLength member of the filter is set to zero.
• Input Parameters :
  • rls : asptRls32f filter to be initialized
  • L : number of filter coefficients
  • mu : forgetting factor.
  • b : small scalar to initialize the auto-correlation matrix inverse
• Error Conditions
  • ASPT_NO_ERR : Initialization is successful
  • ASPT_RANGE_ERR : L/b is not a valid input value
  • ASPT_NO_MEM_ERR : could not allocate memory

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rls32fInitStatic

DT32S rls32fInitStatic(asptRls32f *rls, DT32S L, DT32F mu, DT32F b, DT32F *pCof, DT32F *pDat)

Initializes an asptRls32f filter to use pre-allocated memory.
• Returns :
  • Error code. On failure, the filterLength member of the filter is set to zero.
• Input Parameters :
  • rls : asptRls32f filter to be initialized
  • L : number of filter coefficients
  • mu : forgetting factor.
  • b : small scalar to initialize the auto-correlation matrix inverse
  • 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 [2*L + rsum(1,L)] 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/b is not a valid input value

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rls32fFilterUpdate

DT32F rls32fFilterUpdate(asptRls32f *rls, DT32F inp, DT32F des)

Calculates the filter output and updates the coefficients vector according to the RLS algorithm.
• Returns :
  • The filter output sample.
• Input Parameters :
  • rls : pointer to the asptRls32f filter
  • inp : new input sample.
  • des : new desired sample
• Remarks :
  • The error sample is stored internally and can be retrieved by calling rls32fGetLastErrorSample().

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rls32fFilterOnly

DT32F rls32fFilterOnly(asptRls32f *rls, DT32F inp)

Calculates the filter output but does not updates the coefficients. It also updates the estimate of the auto-correlation matrix inverse.
• Returns :
  • The filter output sample.
• Input Parameters :
  • rls : pointer to the asptRls32f filter
  • inp : new input sample.
• Remarks :
  • error sample is not calculated.

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rls32fLCFilterUpdate

DT32F rls32fLCFilterUpdate(asptRls32f *rls, DT32F des)

Calculates the filter output and updates the coefficients vector according to the RLS algorithm for the Linear Combiner filter configuration. Assumes the delay line has been already updated before calling this function.
• Returns :
  • The filter output sample.
• Input Parameters :
  • rls : pointer to the asptRls32f filter
  • des : new desired sample
• Remarks :
  • The error sample is stored internally and can be retrieved by calling nlms32fGetLastErrorSample().

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rls32fFilterOnly

DT32F rls32fFilterOnly(asptRls32f *rls, DT32F inp)

Calculates the filter output but does not updates the coefficients. It also updates the input power for the Linear Combiner filter configuration. Assumes the delay line has been already updated before calling this function.
• Returns :
  • The filter output sample.
• Input Parameters :
  • rls : pointer to the asptRls32f filter
• Remarks :
  • error sample is not calculated.

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rls32fFree

void rls32fFree(asptRls32f *rls)

Frees the allocated memory for this asptRls32f filter.
• Returns :
  • void
• Input Parameters :
  • rls : pointer to the asptRls32f filter
• Remarks :
  • Use this function only with filters created with rls32fInit(). Do not use with asptRls32f filters created using rls32fInitStatic().

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rls32fReset

DT32S rls32fReset(asptRls32f *rls)

Resets all filter coefficients to zero.
• Returns :
  • Error code
• Input Parameters :
  • rls : pointer to asptRls32f filter to be reset
• Error Conditions
  • ASPT_NO_ERR : success
  • ASPT_NULL_PTR_ERR : NULL pointer error

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rls32fResetDelayLine

DT32S rls32fResetDelayLine(asptRls32f *rls)

Resets all internal delay lines to zero.
• Returns :
  • Error code
• Input Parameters :
  • rls : pointer to asptRls32f filter to be reset
• Error Conditions
  • ASPT_NO_ERR : success
  • ASPT_NULL_PTR_ERR : NULL pointer error

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rls32fGetCoef

DT32S rls32fGetCoef(asptRls32f *rls, 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 :
  • rls : pointer to asptRls32f 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/rls->coef is a NULL pointer
  • ASPT_RANGE_ERR : ind/N is not a valid input value

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rls32fSetCoef

DT32S rls32fSetCoef(asptRls32f *rls, 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 :
  • rls : pointer to asptRls32f 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 :
  • rls->coef is updated
• Error Conditions
  • ASPT_NULL_PTR_ERR : newCoef/rls->coef is a NULL pointer
  • ASPT_RANGE_ERR : ind/N is not a valid input value

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rls32fGetDelayLine

DT32S rls32fGetDelayLine(asptRls32f *rls, 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 :
  • rls : pointer to the asptRls32f 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/rls->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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rls32fSetDelayLine

DT32S rls32fSetDelayLine(asptRls32f *rls, 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 :
  • rls : pointer to asptRls32f 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 :
  • rls->delayLine is updated
• Error Conditions
  • ASPT_NULL_PTR_ERR : newBuf/rls->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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rls32fResize

DT32S rls32fResize(asptRls32f *rls, DT32S newLength)

Resizes an asptRls32f filter keeping as much of the filter state as possible.
• Returns :
  • Error code.
• Input Parameters :
  • rls : pointer to the asptRls32f 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 asptRls32f filters.