l n by two fixed complex valued constants mathematically the function of this module may be described by the following products cos u2061 4 u2062 u2062 u03c0 32 j u2062 u2062 sin u2061 4 u2062 u2062 u03c0 32 u00d7 output u2062 u2062 from u2062 u2062 gx u2062 u2062 module u2062 ue891 cos u2061 12 u2062 u2062 u03c0 32 j u2062 u2062 sin u2061 12 u2062 u2062 u03c0 32 u00d7 output u2062 u2062 from u2062 u2062 gx u2062 u2062 module the gx2 module 340 receives the output r l n of the gx module 320 and is also adapted to receive the fixed constant from the corresponding storage unit 346 those skilled in the art will appreciate that with the real and imaginary components reversed therefore by multiplying r l n with may be obtained by manipulating the result of the first product thereby eliminating the need to perform an extra multiplication specifically the second product r l u2061 n u00d7 u2147 j12 u2062 u2062 u03c0 32 may be obtained simply by rearranging the manner in which the inner products resulting from the first product i e r l u2061 n u00d7 u2147 j4 u2062 u2062 u03c0 32 are added or subtracted the results of.