## Frequency Dependant Rejection (FDR)

Overview

Frequency Dependent Rejection (FDR) is the amount of attenuation offered by a receiver to a transmitted signal. This attenuation is composed of two parts: on-tune rejection (OTR) and off-frequency rejection (OFR). The FDR program computes FDR and optionally Frequency-Distance (F-D) relationships between transmitter and receiver. The user must supply the 3 dB bandwidth of the transmitter, and the spectrum described by discrete points. The FDR is calculated using the Gauss-Legendre Quadrature integration method. For each frequency that the FDR is calculated, an optional F-D distance is calculated using either a Smooth Curve Smooth Earth, or Free-Space propagation model. The following output listings are created by this program:

- the transmitter and receiver input curves
- OFR vs delta F
- FDR vs delta F
- F-D vs delta F (optional)

The following x-y data are written to an optional disk file:
- the transmitter and receiver input curves
- FDR vs delta F
- delta F (optional)

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This page last updated May 16, 2002