| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress an increase in cost of parts and prevent the expansion of circuit scale by decreasing the number of modulators. <P>SOLUTION: The code division multiplex signal transmitter includes an operational circuit 30, a modulator unit 40 and a multiplexer 50. The operational circuit 30 adds up input transmission data S103-1 to S103-N that are equal in number to channel number N to produce resultant added data S105, and produces pieces of bit transmission data S107-1 to S107-M which respectively indicate the values of corresponding digits, the pieces of bit transmission data S107-1 to S107-M being equal in number to the number M of digits, obtained by expressing the added data in binary number system. The modulator unit 40 includes modulators 42-1 to 42-M corresponding in number to the number M of the added data in the binary number system. A k-th modulator (where k is an integer of ≥1 to ≤M) modulates a k-th bit transmission data S107-k to produce a k-th bit modulated signal S109-k whose amplitude level is 2<SP>k-1</SP>. The multiplexer multiplexes first to M-th bit modulated signals S109-1 to S109-M to produce a code division multiplex signal. <P>COPYRIGHT: (C)2010,JPO&INPIT |
