Spread-spectrum communication system

A spread-spectrum signal transmitting apparatus comprising:

• a plurality of multiplying means for multiplying each digit of a plurality of digits of a spread-spectrum code sequence by a corresponding digit representing information to be transmitted;
• and
• modulating means for modulating an output of each of the plurality of multiplying means by a corresponding carrier wave signal, each carrier wave signal having a different frequency.

A spread-spectrum signal receiving apparatus comprising:

• a plurality of multiplying means for multiplying each digit representing a received signal by a corresponding digit of a plurality of digits of a spread-spectrum core sequence, said multiplication being performed for each of a corresponding carrier-wave frequency;
• and
• decision means for discriminating original data based upon outputs from said plurality of multiplying means.

A spread-spectrum communication system comprising:

• a transmitting side for modulating each of a plurality of carrier-wave signals having different frequencies, based upon information to be transmitted and a plurality of digits of a spread-spectrum core sequence;
• and
• a receiving side for demodulating a received signal for each of a plurality of frequency bands based upon search of the plurality of digits of the spread-spectrum code sequence and for discriminating the information based upon a demodulated result of each of the plurality of frequency bands, the plurality of frequency bands corresponding to frequencies of the plurality of carrier-wave signals.

A wireless communication system comprising:

• a transmitting side for modulating each of a plurality of carrier-wave signals having different frequencies, based upon information to be transmitted;
• and
• a receiving side for demodulating a received signal for each of a plurality of frequency bands and discriminating information based upon a demodulated result of each of the plurality of frequency bands, wherein the plurality of frequency bands correspond to the frequencies of the plurality of carrier-wave signals.

A wireless signal receiving apparatus comprising:

• a plurality of demodulating means for demodulating a received signal for each of a plurality of frequency bands;
• and
• discriminating means for discriminating original data based upon an average of a plurality of demodulated results output by the plurality of demodulating means.