10.4.1 Spectrum sensing characteristics

Detection threshold:

Function (X,Y) or Scalar (offset)

dBm

Define the detection threshold for the spectrum sensing in a offset function.
Either a constant value (i.e. flat over the spectrum) or as a user defined function as shown in #1 of Figure 232 illustrates the setting of the detection threshold (a) as a constant or (b) as a function. Figure 233 (c) illustrates where the offset refers to. Note the user-defined function is defined as offset with the victim frequency being the reference.
The offset  0 is refered to the Victim frequency.

Probability of failure:

Scalar

%

You can select this function as shown in #2 of Figure 232. The probability of failure is given in percentage. In the illustration below a probability of failure of 10% is entered.
Positive value from 0 to 100.

Sensing reception bandwidth

Scalar

kHz

Define the bandwidth of the sensing device (i.e. ILT). It is used in the calculation of the sRSS: This is a constant value given in kHz as shown in #3 of Figure 232.

e.i.r.p. max In-block limit

Function (X,Y) (offset)

Offset (MHz)/ Mask (dBm)/ Ref.BW (kHz)

Define the E.I.R.Pmax In-block limit to protect the victim system as an offset function where the offset  0 is refered to the selected interfering frequency. The outcome of the algorithm set the allowed power at the ILT.
It has the following components [offset, Mask, Ref.BW] where Offset in MHz is equivalent to the “DTT in use at” columns, Mask in dBm is the “In-block CR EIRP_max limit” and Ref. BW is the bandwidth of the DTT as shown in #4 of Figure 232. Note that SEAMCAT will normalise any value entered in the table to 1 MHz and convert back to the victim bandwidth.