an orthogonal transform processor comprising a rotator circuit , a look - up table and a communicator circuit . the rotator circuit performs the complex multiplications required of a rotator , the necessary coefficients are supplied by the look - up table , and the communicator circuit is charged with the task of accepting input signals , supplying the rotator with the signals necessary for each iteration , and delivering the resultant output signals . the rotator is realized with a matrix of spatially adjacent interconnected multiplier and adder modules , where each module comprises a portion of each of the multipliers necessary in the rotator .