PFDs in R46 Impact on BRS and EBS Systems

Desired frequency in MHz

2535

Bandwidth in MHz

BRS/EBS antenna gain dBi

18.15

17.65

15.69

11.91

5.72

-3.93

2.81

4.67

3.05

-3.28

-15.97

-5.09

-4.32

-7.41

-9.96

-3.56

-0.76

-0.57

-1.74

-3.21

-2.85

-3.36

-6.07

-11.21

-14.54

-11.51

-10.28

-8.87

-4.43

-2

-1.43

-2.35

-2.9

-0.6

1.79

2.95

2.71

0.56

-3.63

-4.31

0.33

2.97

4.28

4.42

3.11

1.15

-0.86

-2.67

-4.02

-6.39

-10.94

-12.47

-5.63

-1.92

0.15

1.15

0.82

-0.26

-2.92

-8.03

-21.57

-11.93

-5.11

-1.99

-0.07

0.86

1.25

0.64

-0.37

-1.79

-3.25

-5.03

-7.18

-8.77

-9.59

-9.72

-8.93

-7.98

-7.11

-6.67

-6.18

-5.95

-5.93

-5.59

-5.61

-5.5

-5.66

-5.6

-5.78

-5.98

BRS/EBS Receiver noise figure dB

KTB Noise floor dBW

-144

BRS/EBS system sensitivity in dBW/1MHz

-159.2

-158.7

-156.7

-152.9

-146.7

-137.1

-143.8

-145.7

-144.1

-137.7

-125

-135.9

-136.7

-133.6

-131

-137.4

-140.2

-140.4

-139.3

-137.8

-138.2

-137.6

-134.9

-129.8

-126.5

-129.5

-130.7

-132.1

-136.6

-139

-139.6

-138.7

-138.1

-140.4

-142.8

-144

-143.7

-141.6

-137.4

-136.7

-141.3

-144

-145.3

-145.4

-144.1

-142.2

-140.1

-138.3

-137

-134.6

-130.1

-128.5

-135.4

-139.1

-141.2

-142.2

-141.8

-140.7

-138.1

-133

-119.4

-129.1

-135.9

-139

-140.9

-141.9

-142.3

-141.6

-140.6

-139.2

-137.8

-136

-133.8

-132.2

-131.4

-131.3

-132.1

-133

-133.9

-134.3

-134.8

-135.1

-135.4

-135.5

-135.3

-135.4

-135.2

-135

Satellite elevation in degrees

Satellite PFD in dB(Wm2/MHz) per R539 WRC 2003

-130

-129.6

-129.2

-128.8

-128.4

-128

-127.6

-127.2

-126.8

-126.4

-126

-125.6

-125.2

-124.8

-124.4

-124

-123.6

-123.2

-122.8

-122.4

-122

-121.8

-121.6

-121.4

-121.2

-121

-120.8

-120.6

-120.4

-120.2

-120

-119.8

-119.6

-119.4

-119.2

-119

-118.8

-118.6

-118.4

-118.2

-118

-117.9

-117.8

-117.7

-117.6

-117.5

-117.4

-117.3

-117.2

-117.1

-117

Conversion factor dB(m2)

-29.53

Satellite signal strength in dBW/1MHz

-159.53

-159.13

-158.73

-158.33

-157.93

-157.53

-157.13

-156.73

-156.33

-155.93

-155.53

-155.13

-154.73

-154.33

-153.93

-153.53

-153.13

-152.73

-152.33

-151.93

-151.53

-151.33

-151.13

-150.93

-150.73

-150.53

-150.33

-150.13

-149.93

-149.73

-149.53

-149.33

-149.13

-148.93

-148.73

-148.53

-148.33

-148.13

-147.93

-147.73

-147.53

-147.44

-147.35

-147.26

-147.17

-147.08

-146.99

-146.90

-146.81

-146.72

-146.63

-146.54

Isat/N

-0.38

-0.88

-2.84

-6.62

-12.81

-22.46

-15.32

-13.06

-14.28

-20.21

-32.50

-21.22

-20.05

-22.74

-24.89

-18.09

-14.89

-14.30

-15.07

-16.14

-15.38

-15.49

-17.80

-22.54

-25.47

-22.04

-20.81

-19.40

-14.96

-12.53

-11.96

-12.88

-13.43

-11.13

-8.74

-7.58

-7.82

-9.97

-14.16

-14.84

-10.20

-7.56

-6.25

-6.11

-7.42

-9.38

-11.19

-12.80

-13.95

-16.12

-20.47

-21.80

-14.76

-10.85

-8.58

-7.38

-7.51

-8.39

-10.85

-15.76

-29.10

-19.26

-12.24

-8.92

-6.80

-5.67

-5.19

-5.10

-5.62

-6.54

-7.87

-9.24

-10.93

-12.99

-14.49

-15.22

-15.26

-14.47

-13.52

-12.65

-12.21

-11.72

-11.49

-11.47

-11.13

-11.15

-11.04

-11.20

-11.14

-11.32

-11.52

Predicted Interference (Isat/N in excess of -10 dB)

Yes

Rise in BRS/EBS Noise Floor

2.82

2.59

1.82

0.86

0.22

0.02

0.13

0.21

0.16

0.04

0.00

0.03

0.04

0.02

0.01

0.07

0.14

0.16

0.13

0.10

0.12

0.07

0.02

0.01

0.03

0.04

0.05

0.14

0.24

0.27

0.22

0.19

0.32

0.54

0.70

0.66

0.42

0.16

0.14

0.40

0.70

0.92

0.95

0.72

0.47

0.32

0.22

0.17

0.10

0.04

0.03

0.14

0.34

0.56

0.73

0.71

0.59

0.34

0.11

0.01

0.05

0.25

0.52

0.82

1.04

1.15

1.17

1.05

0.87

0.66

0.49

0.34

0.21

0.15

0.13

0.15

0.19

0.23

0.25

0.28

0.30

0.32

0.33

0.32

0.31

0.30

BRS/EBS Antenna data 0 - 90 degrees

Andrew DMA18W090-H Ant. Elev. Tab Data Gain in dBd

15.5

13.54

9.76

3.57

-6.08

0.66

2.52

0.9

-5.43

-18.12

-7.24

-6.47

-9.56

-12.11

-5.71

-2.91

-2.72

-3.89

-5.36

-5

-5.51

-8.22

-13.36

-16.69

-13.66

-12.43

-11.02

-6.58

-4.15

-3.58

-4.5

-5.05

-2.75

-0.36

0.8

0.56

-1.59

-5.78

-6.46

-1.82

0.82

2.13

2.27

0.96

-1

-3.01

-4.82

-6.17

-8.54

-13.09

-14.62

-7.78

-4.07

-2

-1

-1.33

-2.41

-5.07

-10.18

-23.72

-14.08

-7.26

-4.14

-2.22

-1.29

-0.9

-1.51

-2.52

-3.94

-5.4

-7.18

-9.33

-10.92

-11.74

-11.87

-11.08

-10.13

-9.26

-8.82

-8.33

-8.1

-8.08

-7.74

-7.76

-7.65

-7.81

-7.75

-7.93

-8.13

Number of Simultaneous Satellites Received

PFD specification in R539 WRC 2003 for NGSO BSS

-130 dB(Wm2/MHz) for 0 - 5 degrees

-130 + 0.4 dB(Wm2/MHz) for 5 -25 degrees

-122 dB(Wm2/MHz) for 25 - 45 degrees

-122 + 0.2 dB(Wm2/MHz) for 45 - 65 degrees

-118 + 0.09 dB(Wm2/MHz) for 65 - 76 degrees

-117 dB(Wm2/MHz) for 76 - 90 degrees

By Harry Perlow