Method and apparatus for code division switching
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United States of America Patent
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Aug 14, 2012
Grant Date -
Mar 4, 2010
app pub date -
Nov 16, 2009
filing date -
Dec 20, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Time division multiplexed input signals (i.e., separated into time slots) are spread in each time slot with a destination code. This spreading is applied for destination identification as opposed to signal information modulation. Each spreading signal is associated with a particular destination for a particular time slot. These spread signals are then combined on a code division bus. Output signals for retransmission to the destinations are recovered from the bus by application of despreading codes. Each despread signal has a destination code which appears in its individual time slot. In a variant code division multiplexed signals are directed to a destination by use of time slot interchanger to achieve time division switching to route the CDMA multiplexed channels.
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