Up-link access apparatus in direct sequence code division multiple access system

A method for perforating up-link access in a direct sequence spread spectrum code division multiple access system having a base station and a plurality of mobile stations, said method comprising the steps of:

• mixing base band data to be transmitted to said base station with a pseudo-noise code unique to a first one of said plurality of mobile stations to generate a pseudo-noise code modulated signal;
• generating an up-link carrier frequency comprised of a fixed carrier frequency shifted by an identification frequency unique to said first one of said plurality of mobile stations, each one of said plurality of mobile stations having a different said identification frequency;
• mixing said pseudo-noise code modulated signal with said up-link carrier frequency to generate a spread spectrum signal;
• and
• transmitting said spread spectrum signal from an output port of said first one of said plurality of mobile stations to said base station.

A system for performing up-link access using direct access spread spectrum communication, comprising:

• a base station;
• a plurality of mobile stations;
• transmission means for transmitting data from a first of said plurality of mobile stations to said base station by mixing a pseudo-noise code modulated signal with an up-link carrier frequency to generate said data for transmission to said base station, said up-link carrier frequency comprised of a fixed carrier frequency shifted by a first identification frequency unique to said first of said plurality of mobile stations;
• and
• receiving means for receiving at said base station said data transmitted from said transmission means, mixing said data with a demodulation carrier to generate a mixed signal and integrating said mixed signal according to a specified period, said specified period having a reciprocal equal to an integer multiple of said first identification frequency.

A method for performing up-link access in a direct sequence spread spectrum code division multiple access system having a base station and a plurality of mobile stations, said method comprising the steps of:

• mixing base band data to be transmitted to said base station with a pseudo-noise code to generate a pseudo-noise code modulated signal;
• generating an up-link carrier frequency comprised of a fixed carrier frequency shifted by an identification frequency unique to a first one of said plurality of mobile stations, each one of said plurality of mobile stations having a different said identification frequency;
• mixing said pseudo-noise code modulated signal with said up-link carrier frequency to generate a spread spectrum signal;
• and
• transmitting said spread spectrum signal from an output port of said first one of said plurality of mobile stations to said base station.

A system for performing up-link access using direct access spread spectrum communication, comprising:

• a base station;
• a plurality of mobile stations;
• transmission means for transmitting data from said plurality of mobile stations to said base station by mixing pseudo-noise code modulated signals with up-link carrier frequencies to generate said data for transmission to said base station, each one of said up-link carrier frequencies comprised of a fixed carrier frequency shifted by an identification frequency unique to a respective one of said plurality of mobile stations;
• and
• receiving means for receiving at said base station said data transmitted from said transmission means, mixing said data with demodulation carriers to generate mixed signals and integrating said mixed signals according to specified periods, said specified periods each having a reciprocal equal to an integer multiple of a corresponding said identification frequency.