Nested quadratic arithmetic for efficient convolution of complex sequences with Quadratic Modified Fermat Number Transforms
Chandrasekhar Radhakrishnan, W.K. Jenkins · 2011
Recently the Modified Fermat Number Transform (MFNT) was extended to a Quadratic MFNT (QMFNT) by combining Right Circular Convolution (RCC) and Left Circular Convolution (LCC) to produce a quadratic representation of the convolution output. This paper investigates nesting of two distinct quadratic number representations, the first associated with quadratic coding of complex input sequences, and the second associated with QMFNT block processing. Quadratic coding of complex sequences combined with QMFNT block processing eliminates cross-products in the complex multiplication. Finally, a generalized form of the QMFNT (GMFNT) is introduced and then extended into two dimensions.