| 摘要 |
PURPOSE:To realize the reception system offering higher performance than that of the on/off keying system with only one matched filter by sending a specific filter. CONSTITUTION:A pseudo noise series whose period is L is used and a data symbol to be sent is an M value, and one frame consists of M+L-1+j slot (j>=0). Moreover, a transmitter consists of a module M+L-1+j counter 2, an M detector 3, a comparator 4, a serial parallel converter 5, a module M adder 6, a register 8, a pseudo noise(PN) signal generator 9, and a modulator 10. Then the pseudo noise of an L slot length starting from one slot in an M value from the start of the frame is inserted and the inserted slot position of the pseudo noise is made correspondent to the data symbol and the data symbol is subject to differential coding and a consecutive frame is sent. Thus, the higher performance than that of the on/off keying system is attained and the performance close to the code shift keying is realized with only one matched filter. |
