Data Provider Groups | Data Provider Elements
Probability Density Function
Probability density function is the probability that a parameter is equal to a particular value. It's the derivative of the cumulative density function.
For a given parameter, this report provides each value, the number of samples that have this value, the percentage (i.e. probability mentioned above) and a log of the percentage.
Available for these objects: CommSystem
Type: Fixed data given specified evaluation intervals and step sizes.
Availability: Reports | Graphs
Pre-data required: "<TruncObjectPath>" - e.g. "Satellite/Sat1/Receiver/Receiver1"
Data Provider Groups
| Name | Description |
|---|---|
| Rcvd. Iso. Power | Received isotropic power is the power at the receiver before the pre-receive gains/losses and the receiver antenna gain added (in dBW). It is equal to the EIRP with all the channel losses as well as the bandwidth overlap applied. |
| Flux Density | The power from the desired transmitter crossing a unit area normal to the direction of wave propagation. |
| Rcvr Gain | Receiver Gain is the antenna gain (in dBi) of the receiver which is dependent on the antenna type used. |
| Tequivalent | The equivalent system temperature (in K) is specified by the user as a constant value or computed at each time step from the receiver system temperature parameters defined by the user. |
| g/T | G/T = (Receiver Gain)/(System Temperature at the Receiver). The ratio of the receive antenna gain G to the total system temperature T is the "figure of merit" for the receiver (in dB/K). The figure of merit is independent of the point where it is calculated. However, the gain and system temperature must be specified at the same point. |
| C/No | The carrier to noise density ratio (C/No) where C is the carrier power and No = kT (Boltzmann's constant x system temperature) is the noise density. It is equivalent to C/N with a normalized Bandwidth (B=1). |
| C/(No+Io) | The carrier to (noise + interference) ratio (C/(No+Io)) where C is the carrier power, No = kT (Boltzmann's constant * system temperature) and Io = interference power spectral density. |
| C/N | The carrier to noise ratio (C/N) where C is the carrier power and N = kTB (Boltzmann's constant x system temperature x bandwidth) is the noise power. |
| C/(N+I) | The carrier to (noise + interference) ratio (C/(N+I)) where C is the carrier power, N = kTB (Boltzmann's constant * system temperature * bandwidth) and I = interference power. |
| Eb/No | The energy per bit to noise ratio (Eb/No) where Eb is the energy per bit and No = kT (Boltzmann's constant * system temperature). |
| Eb/(No+Io) | The energy per bit to (noise + interference) ratio (Eb/(No+Io)) where Eb is the energy per bit, No = kT (Boltzmann's constant * system temperature) and Io = interference power spectral density. |
| C/I | C/I is the carrier power from the desired signal over the sum of all interferer powers. |
| Delta T/T | The ratio of interference power spectral density Io and receiver noise spectral density No. |
| Pwr Flux Density | The power crossing a unit area normal to the direction of wave propagation in watts per square meter (W/m^2). |
| Spectral Flux Density | The dimensions are watts/(m^2 * Hz). The power is computed across the receiver's bandwidth (as seen by the receiver's RF front end). The bandwidth is the receiver's total bandwidth. |
Data Provider Elements
| Name | Dimension | Type | Description |
|---|---|---|---|
| Value | Unitless | Real Number | Constraint specific defining parameters. Active Constraint values are the actual, user-defined values. Example: Lighting condition constraints will list the required illumination state. |
| No. Samples | Unitless | Integer | This is the number of samples of each parameter value used in computing the PDF or CDF for the CommSystem parameters. |
| Percentage | Unitless | Real Number | This is the percentage of occurrence (PDF) or cumulative percentage of occurrence (CDF) for each CommSystem parameter value. |
| Log Percent | Unitless | Real Number | This is the log based 10 of the percentage of occurrence (PDF) or cumulative percentage of occurrence (CDF) for each CommSystem parameter value. |