Multi-band, multi-mode spread-spectrum communication system

An apparatus for multi-band spread-spectrum communication comprising:

• a spread spectrum signal generator, comprising:
• a spread spectrum encoder having as an input information to be encoded and having as an output a spread spectrum signal, said spread spectrum signal being modulated by a first signal having a first frequency, and said spread spectrum signal generator outputting a modulated spread spectrum signal comprising the first frequency;
• a frequency synthesizer outputting a synthesized signal comprising a second frequency;
• a multiplier having a first input coupled to said frequency synthesizer and a second input coupled to said spread spectrum signal generator, said multiplier generating a bimodal signal by multiplying said modulated spread spectrum signal and said synthesized signal;
• a filter coupled to said bimodal signal, said filter having at least a first output frequency range and a second output frequency range;
• said first output frequency range is defined by summation of said first frequency and said second frequency;
• and
• said second output frequency range is defined by taking the difference between said first frequency and said second frequency.

A method of multi-band spread spectrum communication, comprising the steps of:

• generating with a frequency synthesizer a first synthesized frequency range, said first synthesized frequency range being programmably selectable;
• generating a signal comprising a fixed second frequency;
• multiplying said first synthesized frequency range and said second frequency to generate multiplied signals having frequency components in each of two output frequency ranges, including a first output frequency range defined by summation of said first synthesized frequency range and said second frequency, and a second output frequency range defined by taking the difference between said first synthesized frequency range and said second frequency;
• and
• encoding said multiplied signal.

A method for multi-band spread-spectrum communication, comprising the steps of:

• generating a modulated spread spectrum signal by encoding information in a spread spectrum encoder to generate a spread spectrum signal and multiplying said spread spectrum signal with a signal having a first frequency, said modulated spread spectrum signal comprising the first frequency;
• generating with a frequency synthesizer a synthesized signal comprising a second frequency;
• multiplying said modulated spread spectrum signal and said synthesized signal to generate a bimodal signal;
• and
• filtering said bimodal signal to output a filtered signal having a first output frequency range and a second output frequency range, said first output frequency range is defined by summation of said first frequency and said second frequency, said second output frequency range is defined by taking the difference between said first frequency and said second frequency.