BROADCAST PARAMETERS

<< Pulse para mostrar la Tabla de Contenidos >>

Navegación:  Cartography and Planning > Planning Process > Broadcasting > Broadcast parameters

BROADCAST PARAMETERS

Inicio  Anterior  Siguiente

 

All the diffusion parameters of the coverage study are initially configured by default when selecting the service (technology) of the study, with appropriate or typical values ​​of the type of simulation to be performed. It is recommended, however, to be reviewed and specified by the user to adapt their simulation to the reality of the equipment to be simulated.

Broadcast parameters are only present when any of the following technologies are used within the category of sound and audiovisual broadcasting:

FM

DAB-T

Analogue TV

DVB-T

DVB-H

DVB-T2

Depending on the technology to be simulated, it will be necessary to configure different parameters.

FM PARAMETERS

For FM services in Xirio the broadcast parameters that can be configured are:

params_fm

System: Stereo, Mono or Mono mobile

Maximum frequency deviation: 50 or 75 kHz

PARÁMETROS DE DAB-T

For DAB-T services in Xirio the broadcast parameters that can be configured are:

params_dab

Reception type: Portable indoor or mobile terminal.

Percentage of locations: 50%, 70%, 90%, 95% or 99%. The objective of percentage of locations considering the variations due to the occupation of the ground in the surrounding area.

Sigma: Standard deviation of the field strength distribution for digital signals. The field level is considered to follow a log-normal distribution. It has a default value of 5.5 dB.

Transmission mode: Mode I, Mode II, Mode III or Mode IV.

Minimum field strength: Minimum signal level required for proper receiver operation.

PARÁMETROS DE TV ANALÓGICA

For analogue TV services in Xirio the broadcast parameters that can be configured are:

params_tv

System: G, B, B1, D, D1, H, I, K, K1, L or M.

Precision offset: Indicates whether there is a frequency offset or not.

Color system: PAL, SECAM or NTSC.

Offset:

Offset type: None, Normal, Precision, Synchronized o Unspecified.

PARÁMETROS DE DVB-T

For DVB-T services in Xirio the broadcast parameters that can be configured are:

params_dvbt

Reception type: Fixed, Portable outdoor, Portable indoor or Mobile terminal.

Percentage of locations: 50%, 70%, 90%, 95% or 99%. The objective of percentage of locations considering the variations due to the occupation of the ground in the surrounding area.

Sigma: Standard deviation of the field strength distribution for digital signals. The field level is considered to follow a log-normal distribution. It has a default value of 5.5 dB.

Carriers: 2K or 8K.

Guard interval: 1/32, 1/16, 1/8, or 1/4 of symbol interval. Used to avoid interference from delayed, echo or multi-path signals. During this time the echoes do not interfere with the information.

Code rate: 1/2, 2/3, 3/4, 5/6 or 7/8.

Channel modulation: QPSK, 16-QAM or 64-QAM.

Minimum field strength: Minimum signal level required for proper receiver operation.

PARÁMETROS DE DVB-T2

For DVB-T2 services in Xirio the broadcast parameters that can be configured are:

params_dvbt2

Tipo de recepción: Fixed, Portable outdoor, Portable indoor, Mobile or Mobile indoor terminal.

Porcentaje de ubicaciones: 50%, 70%, 90%, 95% or 99%. The objective of percentage of locations considering the variations due to the occupation of the ground in the surrounding area.

Sigma: Standard deviation of the field strength distribution for digital signals. The field level is considered to follow a log-normal distribution. It has a default value of 5.5 dB.

Carriers: 1K, 2K, 4K, 8K, 8Ke, 16K, 16Ke, 32K or 32Ke.

Guard interval: 1/128, 1/32, 1/16, 19/256, 1/8, 19/128 or 1/4 of symbol interval. Used to avoid interference from delayed, echo or multi-path signals. During this time the echoes do not interfere with the information.

Pilot pattern: PP1, PP2, PP3, PP4, PP5, PP6, PP7 or PP8.

Code rate: 1/3, 2/5, 1/2, 3/5, 2/3, 3/4, 4/5, 5/6 or 7/8.

Channel modulation: QPSK, 16-QAM, 64-QAM or 256-QAM.

Block length: 16200 or 64800 symbols by block.

Implementation margin: Indicated by the manufacturer.

Height losses environment: Urban, Suburban, Rural or No Losses. When using mapping with building information in the simulations, it is recommended to configure the No Losses option so that the height correction is not considered in the calculation of the Minimum required field strength or the reception threshold.

Minimum field strength: Minimum signal level required for proper receiver operation.

PARÁMETROS DE SNF

For SFN services in Xirio the broadcast parameters that can be configured are:

params_sfn

Windows start: Triggered by best server, Triggered by first pre-echo strong enough, Triggered by first pre-echo stable with sufficient strength. Sets the transmitter whose signal imposes the reference symbol, from which the save interval begins.

MRMS: This margin applied to the signal level received from the best server, indicates the minimum signal level required for a pre-echo so that the receiver can engage it.

Guard interval: Used to avoid interference from delayed, echo or multi-path signals. During this time the echoes do not interfere with the information.

Symbol interval: Duration of the OFDM symbol.

Equalization interval: During the equalization interval it is considered that the signals can be correctly equalized and contribute constructively to the reception.

TFS gain (Time-Frequency Slicing). Available for DVB-T2. Several statistically multiplexed services are transmitted on more than one RF channel, providing additional gain.

MISO group (Múltiple Input Single Output). Available for DVB-T2. Two transmitters groups broadcat simultaneously two versions slightly different in time and frequency of the desired signal. In this way the system SNR improves and therefore network coverage and data rate also improve.