Code division multiplex transmitting and receiving apparatus and method
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United States of America Patent
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Jan 11, 2011
Grant Date -
Apr 23, 2009
app pub date -
Aug 19, 2008
filing date -
Oct 22, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A code division multiplex transmitting and receiving apparatus has a transmitting apparatus with two coders per channel and terminal units with two matched filters each. One coder and one matched filter employ one spreading code; the other coder and the other matched filter employ another spreading code. The two coded signals output in parallel by the two coders are converted to a single serial signal before being multiplexed. The two matched filters sample alternate chips in the multiplexed signal. The two coders can be supplied with different data signals to double the transmission capacity, or with the same data signal to double the transmission distance. The outputs of the two matched filters are processed separately in the former case and are combined in the latter case.
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