Spread spectrum communication device
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United States of America Patent
Stats
-
Jul 13, 1993
Grant Date -
N/A
app pub date -
Jan 31, 1992
filing date -
Jan 31, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
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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