| 摘要 |
In the phase modulation multiplexing transmission unit 1, a digital input signal is divided by a signal division unit, each of the resultant division signal is output to multiplication units 3a and 3b, respectively. The multiplication units 3a and 3b multiply the division signals by spread code signals output from spread code generators 2a and 2b, respectively. A multiplication signal Sb output from the multiplication unit 3b is shifted by pi/2 radian through a phase shifter 4, which is added to a multiplexing signal Sa output from the multiplication unit 3a through an adder 5. A synthetic signal Se(n) output from the adder 5 is BPSK modulated through a modulator 6, which is transmitted through a transmission amplifier 7 and an antenna 8.
|
