## Forums Search for: ETSI

## Question regarding pilot based channel estimation/frequency synchronization in DVB-T

inHello I am working on the implementation of a demodulator for the European DVB-T standard. I had a query that I hope will be answered by this...

Hello I am working on the implementation of a demodulator for the European DVB-T standard. I had a query that I hope will be answered by this group. During the initial acquisition, how does the DVB-T receiver lock on to the starting phase for the continual/scattered pilot carrier symbols. The ETSI standard mentions that the pilot carriers are derived by mapping the bits derived from a P...

## Channel model for DVB-T

hi: everybody!i have doing DVB-T demodulator, i just want to get program of DVB-T channel model ,which written by matlab or c etc, who can...

hi: everybody!i have doing DVB-T demodulator, i just want to get program of DVB-T channel model ,which written by matlab or c etc, who can help me ? And a question bother me : in ETSI EN 300 744-DVB-T Standard, it include channel model parameter ,but when i translate path delay(us) into samples(nums), some paths will have same delay (samples), who can tell me why? thanks a lot!!

## IFFT in dvb-t

inHi all, I'm working on the Matlab Simulink DVB-T demos (2k). I'd like to understand: After the IFFT block, the frames composed by 2048 data...

Hi all, I'm working on the Matlab Simulink DVB-T demos (2k). I'd like to understand: After the IFFT block, the frames composed by 2048 data samples ( or elementary symbols of 7/64us duration) are sent to the AWGN channel. But, according the standard ETSI EN 300 744 v.1.12 (1997-08) on which the model is based, an OFDM symbol should be composed by 2176 elementary symbols (2048+128 of Guard Int...

## DVB-T Bit interleaver problem

inI'm currently developing DVB-T transmitter on FPGA platform. DVB-T standard (ETSI EN 300 744 v1.6.1) says that in 16-QAM, non-hierarchical...

I'm currently developing DVB-T transmitter on FPGA platform. DVB-T standard (ETSI EN 300 744 v1.6.1) says that in 16-QAM, non-hierarchical transmission mode, bit interleaver uses following interleavers: I0: H0(w) = w I1: H1(w) = (w + 63) mod 126 I2: H2(w) = (w + 105) mod 126 I3: H3(w) = (w + 42) mod 126 I've tested it both using a reference model (found here: http://dante.diei.unipg.it/~bar...

## Should AWGN be part of a simulation setup that tests Adjacent Channel Interference performance?

inHi there, I'm trying to simulate the adjacent channel(ACI) performance of a continuous phase modulation(CPM) scheme so that I can determine if...

Hi there, I'm trying to simulate the adjacent channel(ACI) performance of a continuous phase modulation(CPM) scheme so that I can determine if my modulator/demodulator meets a particular ETSI performance specification. I'm not sure if my simulation should include AWGN as well as the ACI? Ultimately I'm trying to chose a combination of CPM modulation parameters (alphabet size, pulse shape, pu...

## Question on indepth Interleaving in DVB-H

accoding to the ETSI EN 300 744 "In the 2K mode, interleaved vectors shall be mapped onto four consecutive OFDM symbols. For even interleaved...

accoding to the ETSI EN 300 744 "In the 2K mode, interleaved vectors shall be mapped onto four consecutive OFDM symbols. For even interleaved vectors these shall start with symbols 0,8,16,24, etc. and for odd interleaved vectors these shall start with symbols 4,12,20,28, etc. in every super-frame." I have an question about symbol index of 2K mode & in-depth mode. 1. 4 consecutive OFDM sym...

## Coherent times and preamble rates of different wireless standards

inHi, I want to get actual values of the channel coherence time and preamble percentage used in practical wireless standards (e.g. GSM, WCDMA,...

Hi, I want to get actual values of the channel coherence time and preamble percentage used in practical wireless standards (e.g. GSM, WCDMA, LTE...). 1). I have referred the GSM and LTE standards (some ETSI documentations). But I couldn't find a definition or a value for channel coherence time. There are frame times and slot times. Can someone please advice to find the practical channel c...