Complex matched filter with reduced power consumption
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United States of America Patent
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Jun 18, 2002
Issued Date -
N/A
app pub date -
Apr 6, 1999
filing date -
Nov 14, 1996
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Abstract
A matched filter computes complex correlations between a sequence of complex input values and a complex code. The matched filter includes a set of N changeover switches having a first input connected to receive real parts of the input sample values and a second input connected to receive imaginary parts of the input sample values. The switches further include a control input for receiving a control signal in first and second states. When the control signal in the first state is applied, a first output of the changeover switch contains the real value part of the input sample values and a second input contains the imaginary part of the input sample values. When the control signal is in the second state the first input contains the imaginary value part of the input sample values and the second input contains the real value part of the input sample values.
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