Frequency analysis

Details Frequency analysis Frequency analysis

2005-06-14

2005-06-14

Chin, Stephen (Department: 2634)

Pulse or digital communications

Systems using alternating or pulsating current

C455S130000, C342S196000

Reexamination Certificate

active

06907083

ABSTRACT:
An apparatus for frequency content separating an input signal is disclosed. The apparatus comprises a plurality of frequency splitting stages, each stage including one or more up-converter and down-converter pairs. An up-converter and down-converter pair serves (i) to receive a complex input signal representing an input bandwidth and (ii) to output a first complex output signal representing an upper portion of the input bandwidth and a second complex output signal representing a lower portion of the input bandwidth. The upper portion and the lower portion being contiguous and together representing the input bandwidth portion.

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patent: 6351451 (2002-02-01), Butash

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