Consider the modelling of the Signal-to-Noise Ratio (SNR) for a
satellite (sat) communication system linked to an earth station
(et) with the following parameters: 1. Radius of Earth (π
π) in km =
6400 km 2. Radius of satellite above earthβs atmosphere (π) in km=
Input variable 3. Central angle (π½) in degree = Output 4. Longitude
of satellite in degrees (πππππ ππ‘) = 68.5 Β°E 5. Longitude of Earth
Station in degrees (ππππππ‘) = Input variable 6. Frequency of
transmission in GHz (πΉπΊπ»π§) = Input variable 7. Gain of transmitting
antenna in dB (πΊπ‘ ) = 15 dB* 8. Gain of receiving antenna in dB (πΊπ‘
) = 15 dB 9. Stefan-Boltzmann constant (πΎ) = 1.38 Γ 10β23 π½/πΎ 10.
Noise temperature of receiving system in Kelvin (π) = 190 Kelvin
11. Bandwidth of the receiver system in Hz (π΅)= 75 Γ 106 Hz 12.
Received Signal Power in dB (ππ) = Output 13. Transmitted Signal
Power in dBm (ππ‘) = Input variable 14. Path Loss in dB (πΏ) = Output
15. Signal to Noise Ratio (πππ
) = Output *dB is the decibel unit In
order to calculate the SNR during signal transmission from space to
earth, a parameter which gives a statistic of the amount of signal
present during transmission, we employ: πππ
= ππ β ππ [ππ΅] (1)
Where ππ is the received power level in dBm and ππ is the noise
power in dB. Mathematically, ππ = ππ‘ + πΊπ + πΊπ‘ β πΏ [ππ΅π] (2) And,
ππ = 10πΏππ10(πΎππ΅) [ππ΅] (3) The path loss, πΏ, is the amount of
transmitted signal lost due to the effects of travelling through
space and earthβs atmosphere. The path loss in dB is given as: πΏ =
92.44 + 20πΏππ10(π·π‘ππ‘ππ) + 20πΏππ10(πΉπΊπ»π§) [ππ΅] (4) π·π‘ππ‘ππ is referred
to as the slant range, a parameter representing the actual distance
between the earth station and the satellite given by: π·π‘ππ‘ππ = βπ
π
2 + π 2 β 2ππ
ππππ π½ [ππ] (5) Where, π½ = πΆππ β1[πππ(πππππ ππ‘)πππ
(ππππππ‘) + πΆππ (πππππ ππ‘) πΆππ (ππππππ‘)πΆππ (π)] [πππππππ ] 3 For, π =
πππππ ππ‘ Β± ππππππ‘* *If πππππ ππ‘ and ππππππ‘ belong to the same
longitude i.e. both Β°E or both Β°W, use the negative sign If πππππ ππ‘
and ππππππ‘ belong to the different longitude i.e . Β°E and Β°W or
vice versa, use the positive sign Your Tasks in this Laboratory
Using windows forms and writing in C++, design an application that
can be used to estimate the SNR of a typical earth-satellite
communication system using the given parameters as provided. For
this purpose, please note that the summary and interpretation of
the required parameters are given to help your understanding. For
the proposed application, please note that items 2, 5, 6 and 13 are
to be your input variables, while items 3, 12, 14 and 15 are the
output variables. It will an added advantage to you if your
designed GUI shows at attempt of creativity, innovation and
elegance. A REPORT must be written and submitted with respect to
the GUI application being built in this laboratory. A. Thereafter,
using your completed GUI, provide answers for the following
parameters in this use-case scenarios. Note that πππππ ππ‘ is no
longer a constant as previously designated: 1. For Low Earth Orbit
(LEO) satellite in positional orbit at πππππ ππ‘ = 15Β°W: π = 1500 ππ,
ππππππ‘ = 10Β°W, πΉπΊπ»π§ = 6 πΊπ»π§, ππ‘ = 120 ππ΅π [5 Points] 2. For Medium
Earth Orbit (MEO) satellite in positional orbit at πππππ ππ‘ = 30Β°E:
π = 10500 ππ,ππππππ‘ = 40Β°E, πΉπΊπ»π§ = 12 πΊπ»π§, ππ‘ = 75 ππ΅π [5 Points]
3. For Geostationary Earth Orbit (GEO) satellite in positional
orbit at πππππ ππ‘ = 69Β°E: π = 36000 ππ,ππππππ‘ = 59Β°W, πΉπΊπ»π§ = 40 πΊπ»π§,
ππ‘ = 65 ππ΅π [5 Points] B. What are your observations when ππ‘ = 0
ππ΅π in all cases of LEO,MEO and GEO as given above? Explain your
results. [5 Points]
Consider the modelling of the Signal-to-Noise Ratio (SNR) for a satellite (sat) communication system linked to an earth
-
- Site Admin
- Posts: 899603
- Joined: Mon Aug 02, 2021 8:13 am