How is link budget calculated?
A simple link budget equation looks like this: Received power (dBm) = transmitted power (dBm) + gains (dB) − losses (dB)
What is satellite link budget?
Satellite link budget or simply link budget in satellite communication is nothing but the calculation of various factors so as to have an estimation of power that is transmitted from the earth station to satellite and satellite to earth station in order to have a reasonable amount of power reception at the ends.
Which parameter should be calculated for designing a satellite link?
The parameters needed to be calculated in the inter-satellite link budget include: The transmission power of the sending end, the link information rate and the antenna aperture of the receiving end (Huang et al., 2012). In making link budget, some sheets are created by using calculator or Excel.
How do you calculate power received?
P R ∝ G × P T f 2 × d α , where f is the carrier frequency, d is the propagation distance, G is the power gain from the transmit and receive antennas, and α = 2.
What are the two methods of calculating the link budget?
There are two different ways to calculate link budget….Miscellaneous
- Link budget is calculated for all signals uplink, downlink and beacon separately.
- Link budget calculations give a very good set of estimates, eg.
How is link margin calculated?
It can be calculated as follows. Example : Find Available Eb/NO (dB) for the satellite Over all downlink (C/No)(dB) =48.32, Input data rate (dB)= 9.6 KB/S. 7. Available link margin It is the Difference between ‘Available Eb/No’ and ‘Eb/No required for BER of 1/107in dB.
How is LTE link budget calculated?
Terminal noise can be calculated as: “K (Boltzmann constant) x T (290K) x bandwidth”. The bandwidth depends on bit rate, which defines the number of resource blocks….2.2. Uplink Budget.
| Data rate (kbps) | 64 | |
|---|---|---|
| l | RX antenna gain (dBi) | 18.0 |
| m | MHA gain (dB) | 2.0 |
| Maximum path loss | 163.4 = d – i – j – k + l – m |
What is satellite link equation?
Earth Station Uplink It is the process in which earth is transmitting the signal to the satellite and satellite is receiving it. Its mathematical equation can be written as. (CN0)U=[EIRP]U+(GT)U−[LOSSES]U−K.
What are the various factors need to be considered while designing a satellite link?
Factors which need consideration in a link design include operational frequency, propagation effects, acceptable spacecraft/ground terminal complexity (hence cost), effects of noise and regulatory requirements.
How is antenna gain calculated?
Gain is calculated by comparing the measured power transmitted or received by the antenna in a specific direction to the power transmitted or received by a hypothetical ideal antenna in the same situation.
What is satellite link design?
A satellite link is defined as an Earth station – satellite – Earth station connection. The Earth station – satellite segment is called the uplink. The satellite – Earth station segment is called the downlink.
What is the link budget in satellite communication?
Satellite Communication – Link Budget. In satellite communication systems, there are two types of power calculations. Those are transmitting power and receiving power calculations. In general, these calculations are called as Link budget calculations. The unit of power is decibel.
What are the different types of link budget calculations?
Link budget calculations. There are two types of link budget calculations since there are two links namely, uplink and downlink. It is the process in which earth is transmitting the signal to the satellite and satellite is receiving it.
What are the losses of a satellite uplink?
It is the process in which earth is transmitting the signal to the satellite and satellite is receiving it. Here, Losses represent the satellite receiver feeder losses. The losses which depend upon the frequency are all taken into the consideration. The EIRP value should be as low as possible for effective UPLINK.
What is the unit of power in link budget?
Those are transmitting power and receiving power calculations. In general, these calculations are called as Link budget calculations. The unit of power is decibel. First, let us discuss the basic terminology used in Link Budget and then we will move onto explain Link Budget calculations.