| 摘要 |
Ultrashort pulse time hopping code-division-multiple-access (CDMA) and timedivision-multiple-access (TDMA) RF, IR, and optical communications systems (20, 30) in the time-frequency domain (60) comprise a transmitter (20) including a short duration pulse/packet generator (40) for generating a short duration pulse/packet in the femtosecond to microsecond range and a controller (14) for controlling the generator (40), code connected to the controller (14) for varying the time position of each short pulse/packet in frames (90) of pulses/packets (100) in orthogonal superframes (200) of ultrafast time hopping code and time division multiple access format precise oscillator-clock (10) for controlling such timing, encoding modems for transforming intelligence into pulse/packet position modulation form, and antenna/amplifier system (70). Orthogonal codes with temporal coding of the sequence of ultrafast pulses/packets constituting the carrier for transmission by the antenna system (70). |
