receiver

Add receiver to satellite scenario

Syntax

receiver(parent)

receiver(parent,Name,Value)

rx = receiver(___)

Description

receiver(parent) adds a default Receiver object to the parent which can be a Satellite, GroundStation or Gimbal.

receiver(parent,Name,Value) specifies options using one or more name-value arguments. For example, 'MountingAngle',[20; 35; 10] sets the yaw, pitch, and roll angles of the transmitter to 20, 35, and 10 degrees, respectively.

rx = receiver(___) returns a handle to the added receiver. Specify any input argument combination from previous syntaxes.

Examples

Determine Times of Availability for Satellite Link Between Two Ground Stations

Create a satellite scenario object.

startTime = datetime(2020,11,25,0,0,0);
stopTime = startTime + days(1);
sampleTime = 60;                                     % seconds
sc = satelliteScenario(startTime,stopTime,sampleTime)

sc = 
  satelliteScenario with properties:

         StartTime: 25-Nov-2020
          StopTime: 26-Nov-2020
        SampleTime: 60
           Viewers: [0x0 matlabshared.satellitescenario.Viewer]
        Satellites: [1x0 matlabshared.satellitescenario.Satellite]
    GroundStations: [1x0 matlabshared.satellitescenario.GroundStation]
          AutoShow: 1

Add a satellite to the scenario.

semiMajorAxis = 10000000;                                                                  % meters
eccentricity = 0;
inclination = 60;                                                                          % degrees
rightAscensionOfAscendingNode = 0;                                                         % degrees
argumentOfPeriapsis = 0;                                                                   % degrees
trueAnomaly = 0;                                                                           % degrees
sat = satellite(sc,semiMajorAxis,eccentricity,inclination,rightAscensionOfAscendingNode,...
        argumentOfPeriapsis,trueAnomaly,"Name","Satellite");

Add a transmitter to the satellite.

frequency = 27e9;                                                                             % Hz
power = 20;                                                                                   % dBW
bitRate = 20;                                                                                 % Mbps
systemLoss = 3;                                                                               % dB
txSat = transmitter(sat,"Name","Satellite Transmitter","Frequency",frequency,"power",power,...
        "BitRate",bitRate,"SystemLoss",systemLoss)

txSat = 
  Transmitter with properties:

                Name:  Satellite Transmitter
                  ID:  2
    MountingLocation:  [0; 0; 0] meters
      MountingAngles:  [0; 0; 0] degrees
             Antenna:  [1x1 satcom.satellitescenario.GaussianAntenna]
          SystemLoss:  3 decibels
           Frequency:  2.7e+10 Hertz
             BitRate:  20 Mbps
               Power:  20 decibel-watts
               Links:  [1x0 satcom.satellitescenario.Link]

Add a receiver to the satellite.

gainToNoiseTemperatureRatio = 5;                                                                              % dB/K
systemLoss = 3;                                                                                               % dB
rxSat = receiver(sat,"Name","Satellite Receiver","GainToNoiseTemperatureRatio",gainToNoiseTemperatureRatio,...
        "SystemLoss",systemLoss)

rxSat = 
  Receiver with properties:

                           Name:  Satellite Receiver
                             ID:  3
               MountingLocation:  [0; 0; 0] meters
                 MountingAngles:  [0; 0; 0] degrees
                        Antenna:  [1x1 satcom.satellitescenario.GaussianAntenna]
                     SystemLoss:  3 decibels
    GainToNoiseTemperatureRatio:  5 decibels/Kelvin
                   RequiredEbNo:  10 decibels

Specify the antenna specifications of the repeater.

dishDiameter = 0.5;                                                                        % meters
apertureEfficiency = 0.5;
gaussianAntenna(txSat,"DishDiameter",dishDiameter,"ApertureEfficiency",apertureEfficiency);
gaussianAntenna(rxSat,"DishDiameter",dishDiameter,"ApertureEfficiency",apertureEfficiency);

Add two ground stations to the scenario.

gs1 = groundStation(sc,"Name","Ground Station 1");
latitude = 52.2294963;                                               % degrees
longitude = 0.1487094;                                               % degrees
gs2 = groundStation(sc,latitude,longitude,"Name","Ground Station 2");

Add gimbals to the ground stations. These gimbals enable you to steer the ground station antennas to track the satellite.

mountingLocation = [0; 0; -5];                                                              % meters
mountingAngles = [0; 180; 0];                                                               % degrees
gimbalGs1 = gimbal(gs1,"MountingLocation",mountingLocation,"MountingAngles",mountingAngles);
gimbalGs2 = gimbal(gs2,"MountingLocation",mountingLocation,"MountingAngles",mountingAngles);

Track the satellite using the gimbals.

pointAt(gimbalGs1,sat);
pointAt(gimbalGs2,sat);

Add a transmitter to gimbal gimbalGs1.

frequency = 30e9;                                                                             % Hz
power = 40;                                                                                   % dBW
bitRate = 20;                                                                                 % Mbps
txGs1 = transmitter(gimbalGs1,"Name","Ground Stationn 1 Transmitter","Frequency",frequency,...
        "Power",power,"BitRate",bitRate);

Add a receiver to gimbal gimbalGs2.

requiredEbNo = 14;                                                                          % dB
rxGs2 = receiver(gimbalGs2,"Name","Ground Station 2 Receiver","RequiredEbNo",requiredEbNo);

Define the antenna specifications of the ground stations.

dishDiameter = 5;                                   % meters
gaussianAntenna(txGs1,"DishDiameter",dishDiameter);
gaussianAntenna(rxGs2,"DishDiameter",dishDiameter);

Add link analysis to transmitter txGs1.

lnk = link(txGs1,rxSat,txSat,rxGs2)

lnk = 
  Link with properties:

    Sequence:  [8 3 2 9]
    LineWidth:  1
    LineColor:  [0 1 0]

Determine the times when ground station gs1 can send data to ground station gs2 via the satellite.

linkIntervals(lnk)

ans=4×8 table
                Source                           Target               IntervalNumber         StartTime                EndTime           Duration    StartOrbit    EndOrbit
    _______________________________    ___________________________    ______________    ____________________    ____________________    ________    __________    ________

    "Ground Stationn 1 Transmitter"    "Ground Station 2 Receiver"          1           25-Nov-2020 00:26:00    25-Nov-2020 00:40:00      840          NaN          NaN   
    "Ground Stationn 1 Transmitter"    "Ground Station 2 Receiver"          2           25-Nov-2020 03:24:00    25-Nov-2020 03:36:00      720          NaN          NaN   
    "Ground Stationn 1 Transmitter"    "Ground Station 2 Receiver"          3           25-Nov-2020 06:20:00    25-Nov-2020 06:36:00      960          NaN          NaN   
    "Ground Stationn 1 Transmitter"    "Ground Station 2 Receiver"          4           25-Nov-2020 22:25:00    25-Nov-2020 22:38:00      780          NaN          NaN   

Visualize the link using the Satellite Scenario Viewer.

play(sc);

Input Arguments

parent — Element of scenario to which receiver is added

Satellite object | GroundStation object | Gimbal object

Element of scenario to which the receiver is added, specified as a Satellite, GroundStation, or Gimbal object.

Name-Value Arguments

Specify optional comma-separated pairs of Name,Value arguments. Name is the argument name and Value is the corresponding value. Name must appear inside quotes. You can specify several name and value pair arguments in any order as Name1,Value1,...,NameN,ValueN.

Example: 'MountingAngle',[20; 35; 10] sets the yaw, pitch, and roll angles of the receiver to 20, 35, and 10 degrees, respectively.

Name — receiver name

"receiver idx" (default) | string scalar | string vector | character vector | cell array of character vectors

You can set this property only when calling receiver. After you call receiver, this property is read-only.

receiver name, specified as a comma-separated pair consisting of 'Name' and a string scalar, string vector, character vector or a cell array of character vectors.

• If only one receiver is added, specify Name as a string scalar or a character vector.

• If multiple receivers are added, specify Name as a string vector or a cell array of character vectors. The number of elements in the string vector or cell array must be equal to the number of satellites being added.

In the default value, idx is the count of the receiver added by the receiver object function. If another receiver of the same name exists, a suffix _idx₂ is added, where idx₂ is an integer that is incremented by 1 starting from 1 until the name duplication is resolved.

Data Types: char | string

MountingLocation — Mounting location with respect to parent

[0; 0; 0] (default) | three-element row vector of positive numbers

Mounting location with respect to the parent object, specified as a three-element row vector of positive numbers in meters. The position vector is specified in the body frame of the input parent.

MountingAngles — Mounting orientation with respect to parent object

[0; 0; 0] (default) | three-element row vector of positive numbers

Mounting orientation with respect to parent object, specified as a three-element row vector of positive numbers in degrees. The elements of the vector correspond to yaw, pitch, and roll in that order. Yaw, pitch, and roll are positive rotations about the parent's z - axis, intermediate y - axis and intermediate x - axis of the parent.

Example: [0; 30; 60]

Antenna — Antenna object associated with receiver

gaussianAntenna object | antenna object

Antenna object associated with the receiver, specified as an antenna object. This object can be the default gaussianAntenna object, or one from the Antenna Toolbox or Phased Array System Toolbox. The default gaussian antenna has a dish diameter of 1 m and an aperture efficiency of 0.65.

SystemLoss — Total loss in receiver

5 (default) | positive scalar

Total loss in the receiver, specified as a real positive scalar. Units are in dB.

GainToNoiseTemperatureRatio — Gain to noise temperature ratio

3 (default) | scalar

Gain to noise temperature ratio of the antenna, specified as the comma-separated pair consisting of 'GainToNoiseTemperatureRatio' and a scalar. Units are in dB/K.

RequiredEbNo — Lowest Eb/No necessary for link closure

10 (default) | positive scalar

Lowest energy per bit to noise power spectral density ratio (Eb/No) necessary for link closure, specified as the comma-separated pair consisting of 'RequiredEbNo' and a positive scalar. Units are in dB.

Output Arguments

rx — Receiver

Receiver object

Receiver attached to parent, returned as a Receiver object.