Data transmitting and receiving apparatus
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United States of America Patent
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-
Apr 2, 1996
Grant Date -
N/A
app pub date -
Dec 20, 1993
filing date -
Dec 24, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A data transmitting and receiving apparatus is disclosed. The receiving apparatus receives a spread spectrum signal prepared by modulating a carrier wave with data to produce a data modulated signal and multiplying the data modulated signal with a spreading signal which has a bandwidth greater than that of the data modulated signal. The receiving apparatus may include three bandpass filters for passing three different band portions of a full band of the spread spectrum signal and producing an intermediate signal, and a detector for detecting data from the intermediate signal and for producing a detector output. The apparatus may also include a reception state evaluation device for detecting the current reception state of the detector and for producing a poor reception signal, when the detector is in a poor reception state. The poor reception signal is used for changing from a current band to another band.
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