Pulse or digital communications – Repeaters – Testing
Patent
1992-01-31
1993-07-13
Barron, Jr., Gilberto
Pulse or digital communications
Repeaters
Testing
380 31, H04K 110
Patent
active
052280551
ABSTRACT:
On the transmitter side of a spread spectrum communication device according to the present invention, transmission date are converted into a plurality of parallel data sets by a serial-parallel convertor and spread-spectrum-modulation is effected by means of PN code generators and selectors. Different modulated outputs are delayed by delay devices, using a sounder channel and the phase thereof as a reference. The delayed outputs and the output of the sounder channel are added by an adder, multiplexed and transmitted.
On the receiver side correlation of a received signal with a reference signal is formed by a correlator and a correlation pulse is obtained from the correlation output. Data are reproduced by means of a sounder detecting circuit, a sampling pulse generating circuit and an information detecting circuit.
In this way data reproduction can be effected with a high efficiency by means of a single correlator.
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Akazawa Shigeo
Endo Mamoru
Hamatsu Masahiro
Uchida Yoshitaka
Barron Jr. Gilberto
Clarion Co. Ltd.
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