Patent ID: 7046738
Filing Date: 2006-05-16
Classification: H04L

Abstract:
1. A method for generating a premodulation-filtered modulation waveform for transmitting octal symbols, the modulation waveform comprising a real part and an imaginary part comprising: inputting to a logic unit successive octal data symbols, each comprising first, second and third information bits; forming in said logic unit a first derived bit by combining the first and third information bits and a second derived bit by combining the second and third information bits; forming first, second, third and fourth address bit sequences by collecting successive first information bits, second information bits, first derived bits, and second derived bits respectively in corresponding registers; generating first, second, third, and fourth filtered waveform segments based on said first, second, third, and fourth bit sequences; combining the first and third filtered waveform segments to obtain a segment of said imaginary part of said modulation waveform; and combining the second and fourth filtered waveform segments to obtain a segment of said real part of said modulation waveform.