Frequency response correction for a receiver having a...

Details Frequency response correction for a receiver having a... Frequency response correction for a receiver having a...

2006-10-18

2011-11-08

Pham, Tuan (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Measuring or testing of receiver

C455S067110, C455S067140, C455S067160, C455S226200

Reexamination Certificate

active

08055226

ABSTRACT:
A method of correcting the frequency response of an RF receiver having a frequency translation device and a fixed IF frequency section uses calibration data representing frequency responses over a wide frequency range for multiple center frequencies. The calibration data are based upon a multi-dimensional model for the frequency translation device that includes at least center frequency and offset frequency. The calibration data are stored in the RF receiver during factory calibration. A run-time normalization of the RF receiver produces a normalization frequency response at a reference frequency, and a relative frequency response at a desired center frequency is derived from the calibration data. The normalized and relative frequency responses are combined to produce an overall frequency response that is used by the RF receiver to configure an inverse filter to correct channel linear distortion produced by the frequency response of the frequency translation device at the desired center frequency.

REFERENCES:
patent: 5262957 (1993-11-01), Hearn
patent: 2002/0181633 (2002-12-01), Trans
patent: 2003/0161420 (2003-08-01), Pupalaikis
patent: 3634528 (1988-04-01), None
patent: 1187376 (2002-03-01), None

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