Utility Functions

polynomial_selector(constraint_length)	Returns the generator polynomials for rate-1/2 convolutional codes for a given constraint_length.
puncture_pattern(turbo_coderate, conv_coderate)	Returns puncturing pattern such that the Turbo code has rate turbo_coderate given the underlying convolutional encoder is of rate conv_coderate.
TurboTermination(constraint_length[, ...])	Termination object, handles the transformation of termination bits from the convolutional encoders to a Turbo codeword.