Conversion of multiple analog signals in an analog to...

Details Conversion of multiple analog signals in an analog to... Conversion of multiple analog signals in an analog to...

2006-02-10

2011-11-15

Ahn, Sam K (Department: 2611)

Pulse or digital communications

Receivers

Angle modulation

Reexamination Certificate

active

08059758

ABSTRACT:
A multiple analog signal converter (100) simultaneously converts multiple analog signals (104,106) to digital signals (112, 114) using a single analog to digital converter (ADC)102. A first analog signal (104) at a first center frequency and a second analog signal (106) at a second center frequency are processed by the ADC (102) to generate a composite digital signal (110) comprising a first digital signal (112) corresponding to the first analog signal (104) and a second digital signal (114) corresponding to the second analog signal (106). The composite digital signal (110) is digitally frequency shifted to recover the second digital signal (106). The first digital signal (104) is recovered by digitally filtering the composite digital signal (110). In some circumstances, a first radio frequency (RF) signal (118) and a second RF signal (122) are frequency shifted to generate the first analog signal (104) and second analog signal (106).

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