Method, system, and apparatus for wideband signal processing

Abstract

Embodiments include methods, systems, and apparatuses capable of dynamically and adaptively operating on wideband signals. Examples include state variable filters whose center frequencies can be tuned using variable gain blocks coupled to outputs of filter integrators. First- and second-order state variable filters may operate on signals in parallel and their outputs combined to produce a filtered output. Filters may be tuned to pass or reject signals depending on the application; sample applications include, but are not limited to: agile filtering; spectrum analysis; interference detection and rejection; equalization; direct intermediate-frequency transmission; and single-sideband modulation and demodulation.

Description

[0001] related application [0002] This application claims priority to US Provisional Application Nos. 61 / 068,720 and 61 / 068,802, both filed March 10, 2008. The entire teaching of the above application is hereby incorporated by reference. Background technique [0003] Increases in signal bandwidth and data rates have driven the development of new signal processing techniques that address the challenges associated with wideband signals. The increased signal bandwidth enables new applications, including active radio frequency (RF) identification (ID) based on ultra-wideband (UWB) technology in heterogeneous environments. In addition, increased signal bandwidth improves ranging accuracy, making wideband technology particularly attractive for radar, imaging, and other applications. [0004] Unfortunately, fundamental scaling limitations regarding clock speed, switching, heat dissipation, and difficulties with fault recovery make digital logic unsuitable for wideband signal proc...

AI Technical Summary

Problems solved by technology

Finally, analog circuits are neither fully reconfigurable nor fully programmable

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