USE OF ORTHOGONAL SIGNALS SHARED BY PLURALITY OF TRANSMITTERS OF CODE-DIVISION MULTIPLEX- TRANSMISSION CHANNEL Russian patent published in 2003 - IPC

FIELD: expanded-spectrum communication systems. SUBSTANCE: shared use of code-division multiplex-transmission channel or code-division multiple-access channel by plurality of transmitters is enabled due to orthogonal signals transmitted over these channels. Plurality of channel orthogonal codes W_i(t) are generated, channel orthogonal codes and pseudonoise code polynomia being assigned to each transmitter in predetermined way. Transmitters generate channel using orthogonal code W_i(t) for each data signal channel and expand spectrum of each data signal with aid of spectrum-expanding pseudonoise code. Each transmitter makes use of same spectrum-expanding pseudonoise codes and time shifts. Neither of channel codes is assigned to more than one transmitter when these transmitters share code division multiple-transmission channel. Pending transmission expanded-spectrum signals are summed up in each transmitter to form one composite signal. Shifts are pre-corrected in time to equalize their time in receivers. Signal frequencies are also pre- corrected for equalizing their frequencies in receiving devices. EFFECT: enlarged functional capabilities of communication system. 30 cl, 7 dwg