Oversampling and digitally filtering RFID signals

Details Oversampling and digitally filtering RFID signals Oversampling and digitally filtering RFID signals

2011-01-18

2011-01-18

Tran, Khai (Department: 2611)

Pulse or digital communications

Receivers

Reexamination Certificate

active

07873121

ABSTRACT:
The disclosure includes a system and method for oversampling and digitally filtering RFID signals. In some implementations of the present disclosure, an RF receiver includes an ADC, a comb filter, and a mask filter. The ADC is operable to directly sample an RF signal independent of a band pass filter and convert the RF signal to a digital signal. The RF signal is sampled at a rate greater than or equal to 60 MHz. The comb filter is coupled to the ADC. The mask filter is coupled to the comb filter. The comb filter and frequency mask filter are configured to filter out-of-band noise in the digital signal.

REFERENCES:
patent: 2005/0094752 (2005-05-01), Frahm et al.
patent: 2007/0004361 (2007-01-01), Srinivasan et al.
patent: 2007/0156799 (2007-07-01), Gilbert
Eugene Hogenauer, “An Economical Class of Digital Filters for Decimation and Interpolation”, IEEE Transaction Acoustics, Speech and Signal Processing, Apr. 1981 (8 pages).
Yong Ching Lim and Rui Yang, “On the Synthesis of Very Sharp Decimators and Interpolators Using the Frequency-Response Masking Technique”, Apr. 2005 (11 pages).

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