Method and system for utilizing undersampling to remove...

Details Method and system for utilizing undersampling to remove... Method and system for utilizing undersampling to remove...

2011-04-05

2011-04-05

Pham, Tuan A (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

C455S139000, C455S147000, C455S181100, C455S182100

Reexamination Certificate

active

07920837

ABSTRACT:
Methods and systems for wireless communication are disclosed and may include band-limiting a wireless signal utilizing a programmable bandpass filter, generating a first signal by undersampling utilizing a clock signal and generating a second signal by undersampling the signal utilizing a delayed version of the clock signal, which may then be subtracted from the first signal. The filter may comprise a microstrip or a coplanar waveguide bandpass filter. The delay may be variable, and may be defined as an inverse of a frequency difference between the desired channel and a blocker signal. The bandwidth of the filter may be centered at the desired channel. The clock signal may be generated at a frequency which may be an integer sub-harmonic of the desired channel, and may be greater than twice a bandwidth of the filter. The delay may be controlled by a programmable delay circuit, which may comprise CMOS inverters.

REFERENCES:
patent: 3895299 (1975-07-01), Tiedeman, Jr.
patent: 3896399 (1975-07-01), McDonald
patent: 6175928 (2001-01-01), Liu et al.
patent: 6864818 (2005-03-01), Hezar
patent: 7598893 (2009-10-01), Gunzelmann et al.
patent: 2002/0181614 (2002-12-01), Mostafa et al.
patent: 2006/0262838 (2006-11-01), Birkett et al.
patent: 2009/0088107 (2009-04-01), Rofougaran et al.
George L. Matthaei, “Narrow-Band, Fixed-Tuned, and Tunable Bandpass Filters With Zig-Zag Hairpin-Comb Resontators,” IEEE Transaction On Microwave Theory and Techniques, vol. 51, No. 4, pp. 1214-1219, Apr. 2003.
Shau-Gang Mao and Yu-Zhi Chueh, “Coplanar Waveguide Bandpass Filters With Compact Size and Wide Spurious-Free Stopband Using Electromagnetic Bandgap Resonators,” IEEE Microwave and Wireless components, vol. 17, No. 3, Mar. 2007.

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