Signals, system, method and apparatus

摘要

Embodiments of the present invention provide a method to produce a modulation signal comprising combining at least two modulation signals, for example, BOCs or derivatives thereof, having portions (chip or a number of chips) thereof with respective relative phases or states ({++,--} and {+-,-+}) selected such that the average of a plurality of said portions at least reduces cross spectral terms of the composite spectrum of said at least two modulation signals.