RSRP 4G/5G Coverage Simulator Calculator

Coverage Calc

Single Calculation

Batch

Propagation Model

Coordinates

Frequency (MHz)

Tx Power (dBm)

BS Height (m)

Numerology / Bandwidth

EPRE (dBm)

Sectors / Beamwidth

Sector Azimuths (deg)

Gain / Add. Loss (Body loss, Slow fading margin, Foliage loss) / Walls (O2I)

O2I

0.00000, 0.00000

4G LTE/ 5G NR Radio Coverage Calculator: RSRP, EPRE, and Link Budget Calculation Online

Professional engineering tool for visualizing 5G/LTE base station coverage zones on an interactive map. The calculator computes Reference Signal Received Power (RSRP) based on Energy Per Resource Element (EPRE) and standardized 3GPP TR 38.901 propagation models. Supports address search, distance measurement, and result export in KML and CSV formats.

A key feature is the automatic calculation of Power Spectral Density (EPRE) based on bandwidth and 5G NR numerology, as well as accounting for signal penetration through external building walls using the O2I (Outdoor-to-Indoor) model.

Calculator User Instructions

Environment Model: Select the propagation scenario — UMa NLOS for dense urban areas, RMa NLOS for suburbs and rural areas, or FSPL for ideal line-of-sight conditions.
BS Coordinates: Pinpoint the installation location on the map or use the address search bar. The ruler allows you to measure distances to objects of interest.
Frequency Parameters: Specify the carrier frequency (default 3800 MHz — band n78), select Numerology (SCS) and Bandwidth. This data is required for accurate energy per resource element calculation.
Transmitter Energy: Enter Tx Power (default 46 dBm) and antenna gain (17 dBi). The EPRE parameter is calculated automatically.
Sector Configuration: Set the number of sectors (1–6), beamwidth, and azimuths. The calculator will plot the coverage zone taking into account signal attenuation outside the main lobe.
Obstacle Accounting (O2I): Check the “O2I” box to add attenuation for signal penetration into a building. Use the “Add. Loss” field for Body Loss, Slow Fading Margin, and Foliage Loss.
Click “Calculate”. Colored RSRP zones from −80 to −120 dBm will appear on the map. Results can be exported to KML for Google Earth or CSV for further analysis.

EPRE and RSRP Calculation
Link Budget Calculation Examples
Wall Attenuation (Outdoor-to-Indoor)
3GPP Propagation Models
Frequently Asked Questions

Calculation Methodology: From EPRE to RSRP

Unlike simplified calculators that use total transmitter power, this algorithm works with Energy Per Resource Element (EPRE). This approach corresponds to the physics of RSRP measurements in 5G NR and LTE networks, where the terminal measures power on individual reference signal subcarriers.

1. EPRE Calculation (dBm)
Transmitter power is distributed across the entire frequency band. Formula for spectral density:
EPRE = P_TX − 10·log₁₀(BW_Hz) + 10·log₁₀(SCS_Hz)
Where:
• P_TX — total transmitter power (dBm).
• BW_Hz — channel bandwidth in Hertz (e.g., 100 MHz = 100·10⁶).
• SCS_Hz — subcarrier spacing (e.g., 30 kHz = 30000 Hz).
2. Effective Isotropic Radiated Power (EIRP)
EIRP = EPRE + G_Antenna (Antenna Gain, dBi)
3. Final Signal Level (RSRP)
RSRP (dBm) = EIRP − PathLoss(d) − WallLoss − AdditionalLoss

5G NR Link Budget Calculation Examples

Example 1: Macro Cell n78 (3800 MHz), Urban Area

Input Data: P_TX = 46 dBm, BW = 100 MHz, SCS = 30 kHz, Gain = 17 dBi, O2I enabled, Add. loss = 18 dB.

EPRE Calculation:
EPRE = 46 − 10·log₁₀(100·10⁶) + 10·log₁₀(30000) = 46 − 80 + 44.77 = 10.77 dBm

EIRP Calculation: 10.77 + 17 = 27.77 dBm

Wall Loss (3.8 GHz): L_wall = 12.2 + 3.2 × 3.8 = 24.36 dB

Available Budget for PathLoss (RSRP = −110 dBm):
PathLoss_max = 27.77 − (−110) − 24.36 − 18 = 95.41 dB

According to the UMa NLOS model, this corresponds to a range of about 180–220 meters for indoor coverage.

Example 2: Rural Area n78 (3800 MHz), Outdoor

Input Data: P_TX = 46 dBm, BW = 100 MHz, SCS = 30 kHz, Gain = 17 dBi, O2I disabled, Add. loss = 10 dB, BS Height = 35 m.

EIRP: 27.77 dBm (same as example 1)

Available Budget for PathLoss (RSRP = −100 dBm):
PathLoss_max = 27.77 − (−100) − 10 = 117.77 dB

According to the RMa NLOS model with a BS height of 35 m, this ensures a range of 1.5–2.5 km for reliable outdoor coverage.

Example 3: Small Cell n41 (2600 MHz), SCS 15 kHz

Input Data: P_TX = 37 dBm, BW = 40 MHz, SCS = 15 kHz, Gain = 10 dBi, O2I enabled.

EPRE Calculation:
EPRE = 37 − 10·log₁₀(40·10⁶) + 10·log₁₀(15000) = 37 − 76.02 + 41.76 = 2.74 dBm

EIRP: 2.74 + 10 = 12.74 dBm

Wall Loss (2.6 GHz): L_wall = 12.2 + 3.2 × 2.6 = 20.52 dB

Small cells are designed for local densification with a coverage radius of 50–150 meters.

Example 4: Comparison of Numerologies at Equal Power

Conditions: P_TX = 46 dBm, BW = 100 MHz, frequency 3800 MHz.

SCS	EPRE	Comment
15 kHz	7.76 dBm	More subcarriers — energy is distributed more broadly
30 kHz	10.77 dBm	Standard choice for FR1
60 kHz	13.78 dBm	Fewer subcarriers — higher EPRE for each

Doubling the SCS increases EPRE by 3 dB, which is equivalent to increasing the range by 15–20% under otherwise equal conditions.

Signal Attenuation in Walls (O2I Model)

For 5G NR frequencies (especially C-band 3.3–4.2 GHz and n79 4.4–5.0 GHz), building penetration is a critical planning factor. The calculator uses a frequency-dependent attenuation model for typical reinforced concrete construction.

Wall Loss Formula:

L_wall = 12.2 + 3.2 · f_GHz

Reference values for popular bands:

Band	Frequency	O2I Loss
n3 (LTE 1800)	1800 MHz	≈ 18.0 dB
n41	2600 MHz	≈ 20.5 dB
n78	3500 MHz	≈ 23.4 dB
n78	3800 MHz	≈ 24.4 dB
n79	4700 MHz	≈ 27.2 dB

3GPP TR 38.901 Radio Wave Propagation Models

The calculator implements standardized Path Loss models for the FR1 frequency range (410 MHz – 7.125 GHz):

Model	Scenario	Application
UMa NLOS	Urban Macro, Non-Line-of-Sight	Dense urban areas, multi-story buildings, no line of sight. The main model for urban planning.
RMa NLOS	Rural Macro, Non-Line-of-Sight	Suburbs, rural areas, low-rise buildings. Accounts for an average building height of 5 m and street width of 20 m.
FSPL	Free Space Path Loss	Ideal propagation conditions without obstacles. Used for estimating the upper range limit or fixed radio links.

Frequently Asked Questions (FAQ)

Why input Numerology and Bandwidth instead of PRB count?

This is done to improve calculation accuracy and convenience. In 5G NR, the number of Resource Blocks (PRB) depends on the selected numerology (SCS 15/30/60 kHz for FR1) and guard bands, which differ for each combination. Direct input of bandwidth and SCS allows the calculator to accurately determine EPRE without needing to consult 3GPP TS 38.101 tables.

Why is 3800 MHz selected by default?

The 3.8 GHz range falls within the n78 band (3300–3800 MHz), which is the primary mid-band spectrum for 5G NR deployment in Europe and most countries worldwide. This band provides an optimal balance between network capacity and coverage radius.

How critical is enabling the O2I option?

At 3.8 GHz, a single external building wall introduces about 24 dB of attenuation. Practical example: if the RSRP level on the street is −85 dBm (excellent quality), immediately behind the wall inside the building it will drop to −109 dBm (threshold for stable connection). This option must be enabled for planning indoor coverage or assessing signal quality indoors.

What should be included in the “Add. Loss” field?

Recommended values for a typical calculation:

Body Loss: 3–4 dB
Slow Fading Margin: 6–8 dB for 90% coverage probability
Foliage Loss: 5–15 dB depending on season and density
Cable Losses: if not accounted for in antenna gain

A total value of 15–20 dB is typical for conservative planning.

How does the calculation for multiple sectors work?

The calculator plots the antenna pattern for each sector based on the specified Beamwidth. Signal attenuation outside the main lobe is calculated using the formula: Att = 12·(θ/θ_3dB)², where θ is the angle of deviation from the azimuth, and θ_3dB is the beamwidth at the −3 dB level. Maximum attenuation is limited to 25 dB (side lobe level).

What is the export to KML and CSV for?

KML is a format for visualization in Google Earth Pro. It allows you to overlay calculated coverage zones onto high-resolution satellite imagery and terrain. CSV is a tabular format for importing parameters into Excel or specialized radio planning software.

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