Patent ID: 7876845
Filing Date: 2011-01-25
Classification: H04B,H04K,H04L

Abstract:
1. A method of forming a spread-spectrum communications alphabet for communicating spread-spectrum information that is characterized by a reduced cyclostationary feature; the method comprising: forming a plurality of frequency-domain signals comprising substantially overlapping frequency content therebetween; each frequency-domain signal of the plurality of frequency domain signals comprising a plurality of amplitude components and a respective plurality of phase components; pseudo-randomly assigning a value to each phase component of the plurality of phase components of each one of the plurality of frequency-domain signals; transforming the plurality of frequency domain signals to a plurality of time-domain signals; orthogonalizing the plurality of time-domain signals so as to generate a respective plurality of time-domain signals that are orthogonal therebetween; and transmitting and/or receiving spread-spectrum information over a frequency space using the respective plurality of time-domain signals that are orthogonal therebetween so that the spread-spectrum information is characterized by the reduced cyclostationary feature; wherein said plurality of time-domain signals comprises a plurality of pseudo-random time-domain signals, said respective plurality of time-domain signals that are orthogonal therebetween comprises a plurality of pseudo-random time-domain signals that are orthogonal therebetween and wherein said spread-spectrum communications alphabet comprises the plurality pseudo-random time-domain signals that are orthogonal therebetween.