| 摘要 |
PURPOSE:To send a multi-value signal and a high speed signal without spreading a band while keeping a multi-chip code in the spread spectrum communication. CONSTITUTION:An information generating section 1 generates multi-value information. A code controlled by a code controller 2 is given to an A code spread section 4 and a B code spread section 5, in which two signals having partial correlation to two kinds of spread codes are generated and the result is modulated by BPSK modulators 7, 7-1 and the modulated signal is sent. A received signal is inverse-spread by an A code inverse spread section 16 and a B code inverse spread section 17, a differential detection section 18 extracts a correlation output difference and it is quantized by a quantization circuit 19 and decoded by an information decoding section 20. |
