Conversion Functions

The functions described in this section perform the following conversion operations for vectors:

• Sorting all elements of a vector
• Data type conversion (including floating-point to integer and integer to floating-point)
• Joining several vectors
• Extracting components from a complex vector and constructing a complex vector
• Computing the complex conjugates of vectors
• Cartesian to polar and polar to Cartesian coordinate conversion.

This section also describes the Intel IPP functions that extract real and imaginary components from a complex vector or construct a complex vector using its real and imaginary components. The functions ippsReal and ippsImag return the real and imaginary parts of a complex vector in a separate vector, respectively. The function ippsRealToCplx constructs a complex vector from real and imaginary components stored in two respective vectors. The function ippsCplxToReal returns the real and imaginary parts of a complex vector in two respective vectors. The function ippsMagnitude computes the magnitude of a complex vector elements.

Additionally this section describes functions that perform the Viterbi decoding for V34 receiver.

• SortAscend, SortDescend
  Sorts all elements of a vector.
• SortIndexAscend, SortIndexDescend
  Rearranges elements of the vector and their indexes.
• SortRadixAscend, SortRadixDescend
  Sorts all elements of a vector using radix sorting algorithm.
• SortRadixIndexAscend, SortRadixIndexDescend
  Indirectly sorts all elements of a vector using radix sorting algorithm.
• SwapBytes
  Reverses the byte order of a vector.
• Convert
  Converts the data type of a vector and stores the results in a second vector.
• Join
  Converts the floating-point data of several vectors to integer data, and stores the results in a single vector.
• JoinScaled
  Converts with scaling the floating-point data of several vectors to integer data and stores the results in a single vector.
• SplitScaled
  Converts the integer data of a vector to floating-point data with scaling, and stores the result in several vectors.
• Conj
  Stores the complex conjugate values of a vector in a second vector or in-place.
• ConjFlip
  Computes the complex conjugate of a vector and stores the result in reverse order.
• Magnitude
  Computes the magnitudes of the elements of a complex vector.
• MagSquared
  Computes the squared magnitudes of the elements of a complex vector.
• Phase
  Computes the phase angles of elements of a complex vector.
• PowerSpectr
  Computes the power spectrum of a complex vector.
• Real
  Returns the real part of a complex vector in a second vector.
• Imag
  Returns the imaginary part of a complex vector in a second vector.
• RealToCplx
  Returns a complex vector constructed from the real and imaginary parts of two real vectors.
• CplxToReal
  Returns the real and imaginary parts of a complex vector in two respective vectors.
• DemodulateFM
  Converts frequency modulated signal into the initial demodulated form.
• Threshold
  Performs the threshold operation on the elements of a vector by limiting the element values by specified value.
• Threshold_LT, Threshold_GT
  Performs the threshold operation on the elements of a vector by limiting the element values by the specified value.
• Threshold_LTAbs, Threshold_GTAbs
  Performs the threshold operation on the absolute values of elements of a vector.
• Threshold_LTVal, Threshold_GTVal, Threshold_LTValGTVal
  Performs the threshold operation on the elements of a vector by limiting the element values by the specified value.
• Threshold_LTInv
  Computes the inverse of vector elements after limiting their magnitudes by the given lower bound.
• CartToPolar
  Converts the elements of a complex vector to polar coordinate form.
• PolarToCart
  Converts the polar form magnitude/phase pairs stored in input vectors to Cartesian coordinate form.
• MaxOrder
  Computes the maximum order of a vector.
• Preemphasize
  Computes preemphasis of a single precision real signal in-place.
• Flip
  Reverses the order of elements in a vector.
• FindNearestOne
  Finds an element of the table which is closest to the specified value.
• FindNearest
  Finds table elements that are closest to the elements of the specified vector.

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