Method and apparatus for integrated channel characterization

Details Method and apparatus for integrated channel characterization Method and apparatus for integrated channel characterization

2008-06-03

2008-06-03

Payne, David C. (Department: 2611)

Pulse or digital communications

Testing

Reexamination Certificate

active

07382825

ABSTRACT:
A periodic broadband signal can be used to determine the S21measurement for a channel by stimulating the channel across a spectrum of interest. The channel response to such broadband signal can be measured from undersampled data captured at the receiver. The Fourier transform of the broadband signal as received, divided by the Fourier transform of broadband signal as transmitted, constitutes the S21. A physically contiguous IC can integrate both a receiver circuit, at which S21is to be measured, along with an undersampler for sampling the received broadband signal. To maximize signal to noise, a pattern for the broadband signal can be selected to maximize the minimum power across the spectrum of interest. A pattern generator for the broadband signal can be integrated on the same physically contiguous IC with a multiplexer that can select either the pattern generator, or a typical source of data, for transmission into the channel.

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