satelliteCNRConfig
Description
Use the satelliteCNRConfig
object to create a carrier-to-noise ratio
(CNR) configuration object with default or specified values.
Creation
Description
creates a default
CNR configuration object.cfg
= satelliteCNRConfig
This object contains the parameters required to calculate a satellite link budget CNR.
sets properties using one or more
name-value arguments. For example, cfg
= satelliteCNRConfig(Name
=Value
)TransmitterPower=20
sets the
transmitter power to 20 dBW.
Properties
TransmitterPower
— Transmitter power
10
(default) | real scalar
Transmitter power in dBW, specified as a real scalar.
Data Types: double
TransmitterSystemLoss
— Total system loss of the transmitter
0
(default) | nonnegative real scalar
Total system loss of the transmitter in dB, specified as a nonnegative real scalar.
Data Types: double
TransmitterAntennaGain
— Transmitter antenna gain
10
(default) | nonnegative real scalar
Transmitter antenna gain in dBi, specified as a nonnegative real scalar.
Data Types: double
Distance
— Distance between transmitter and receiver antenna
3786
(default) | nonnegative real scalar
Distance between the transmitter and the receiver antenna in km, specified as a nonnegative real scalar.
Data Types: double
Frequency
— Signal frequency
14
(default) | positive real scalar
Signal frequency in GHz, specified as a positive real scalar.
Data Types: double
MiscellaneousLoss
— Miscellaneous losses
0
(default) | nonnegative real scalar
Miscellaneous losses in dB, specified as a nonnegative real scalar. Major miscellaneous losses include polarization loss, interference loss, and atmospheric attenuation.
Data Types: double
GainToNoiseTemperatureRatio
— Receiver gain-to-noise temperature ratio
3
(default) | real scalar
Receiver gain-to-noise temperature ratio in the direction of the transmitting antenna, specified as a real scalar. Value is in dB/K.
Data Types: double
ReceiverSystemLoss
— Total receiver system loss
0
(default) | nonnegative real scalar
Total receiver system loss in dB, specified as a nonnegative real scalar.
Data Types: double
BitRate
— Bit rate of link
10
(default) | positive real scalar
Bit rate of the link in Mbps, specified as a positive real scalar.
Data Types: double
SymbolRate
— Symbol rate of link
10
(default) | positive real scalar
Symbol rate of the link in Msym/s, specified as a positive real scalar.
Data Types: double
Bandwidth
— Signal bandwidth
6
(default) | positive real scalar
Signal bandwidth in MHz, specified as a positive real scalar.
Data Types: double
Object Functions
satelliteCNR | Carrier-to-noise ratio for configured satellite link budget parameters |
Examples
Create Satellite CNR Object
Create a default satellite carrier-to-noise ratio (CNR) object.
Set the bandwidth to 15 MHz and gain-to-noise temperature to 5 dB/K.
cfg = satelliteCNRConfig; cfg.Bandwidth = 15; cfg.GainToNoiseTemperatureRatio = 5;
Display the CNR configuration object properties.
disp(cfg)
satelliteCNRConfig with properties: TransmitterPower: 10 TransmitterSystemLoss: 0 TransmitterAntennaGain: 10 Distance: 3786 Frequency: 14 MiscellaneousLoss: 0 GainToNoiseTemperatureRatio: 5 ReceiverSystemLoss: 0 BitRate: 10 SymbolRate: 10 Bandwidth: 15
Calculate CNR and Link Margin
Calculate the CNR and the received link margin for the specified link budget parameters.
Create a default CNR configuration object, and then set its properties.
cfg = satelliteCNRConfig; cfg.TransmitterPower = 17; % in dBW cfg.TransmitterSystemLoss = 9; % in dB cfg.TransmitterAntennaGain = 38; % in dBi cfg.Distance = 40215; % in km cfg.Frequency = 11; % in GHz % Here, miscellaneous losses include polarization loss, interference % loss, and antenna mispointing loss, respectively. polLoss = 3.0103; intLoss = 2; antLoss = 1; cfg.MiscellaneousLoss = polLoss + intLoss + antLoss; % in dB cfg.GainToNoiseTemperatureRatio = 25; % in dB/K cfg.ReceiverSystemLoss = 2; % in dB cfg.BitRate = 10; % in Mbps
Display the CNR configuration object properties.
disp(cfg)
satelliteCNRConfig with properties: TransmitterPower: 17 TransmitterSystemLoss: 9 TransmitterAntennaGain: 38 Distance: 40215 Frequency: 11 MiscellaneousLoss: 6.0103 GainToNoiseTemperatureRatio: 25 ReceiverSystemLoss: 2 BitRate: 10 SymbolRate: 10 Bandwidth: 6
Calculate the CNR.
[cn,info] = satelliteCNR(cfg)
cn = 18.4440
info = struct with fields:
TransmitterEIRP: 46
FSPL: 205.3634
ReceivedIsotropicPower: -165.3737
CarrierToNoiseDensityRatio: 86.2255
ReceivedEbNo: 16.2255
ReceivedEsNo: 16.2255
Compute the link margin. Assume a required energy per bit to noise power density ratio (Eb/No) of 10 dB and an implementation loss of 2 dB in the receiver.
reqEbNo = 10; implLoss = 2; margin = info.ReceivedEbNo - reqEbNo - implLoss
margin = 4.2255
Extended Capabilities
C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.
Version History
Introduced in R2022b
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