JPH048982U

JPH048982U -

Info

Publication number: JPH048982U
Application number: JP4938790U
Authority: JP
Priority date: 1990-05-11
Filing date: 1990-05-11
Publication date: 1992-01-27

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す図、第２図
及び第３図は第１図各部の信号波形を示す図、第
４図は従来の復調装置を示す図、第５図及び第６
図は第４図各部の信号波形を示す図である。１は
符号系列発生器、２は符号系列信号、３は二重平
衡変調器、４は受信信号、５は復調信号、６はス
イツチ、７はレンジゲート信号、８は第２のスイ
ツチ、９は第２のスイツチ８の出力信号である。
なお、図中同一あるいは相当部分には同一符号を
付して示してある。 FIG. 1 shows an embodiment of this invention, FIGS. 2 and 3 show signal waveforms at various parts in FIG. 1, FIG. 4 shows a conventional demodulator, and FIGS. 6
The figure is a diagram showing signal waveforms at each part in FIG. 4. 1 is a code sequence generator, 2 is a code sequence signal, 3 is a double balanced modulator, 4 is a received signal, 5 is a demodulated signal, 6 is a switch, 7 is a range gate signal, 8 is a second switch, 9 is a This is the output signal of the second switch 8.
It should be noted that the same or corresponding parts in the figures are indicated by the same reference numerals.

Claims

[Scope of utility model registration request]

It is composed of a code sequence consisting of two values of +1 and -1 and has a constant period, and the code sequence signal is synchronized with the reception timing and the code sequence signal is synchronized with the reception timing, with positive voltage and negative voltage corresponding to each binary value. A code sequence generator that generates a range gate signal, a switch that switches this code sequence signal using a range gate signal, a double balanced modulator that receives the switched code sequence signal and demodulates a received signal, 1. A demodulation device comprising a switch that receives a demodulation signal that is an output of a balanced modulator and performs switching according to the range gate signal.