## Forums Search for: ETSI

## Channel models for HIPERLAN/2 ETSI/BRAN Doc.

Dear All, Can somebody help me in finding the following documents? 1. J. Medbo and P. Schramm, "Channel models for...

Dear All, Can somebody help me in finding the following documents? 1. J. Medbo and P. Schramm, "Channel models for HIPERLAN/2," ETSI/BRAN document no. 3ERI085B. 2. J. Medbo and J-E. Berg, "Measured radiowave propagation characteristics at 5 GHz for typical HIPERLAN/2 scenarios," ETSI/BRAN document no. 3ERI084A. They are not on ETSI web-site ! Thanks in Advance Hany

## Channel Model Document For HIPERLAN/2

Hi, Can somebody help me in finding the following documents? 1. J. Medbo and P. Schramm, ?Channel models for HIPERLAN/2,? ETSI/BRAN document...

Hi, Can somebody help me in finding the following documents? 1. J. Medbo and P. Schramm, ?Channel models for HIPERLAN/2,? ETSI/BRAN document no. 3ERI085B. 2. J. Medbo and J-E. Berg, ?Measured radiowave propagation characteristics at 5 GHz for typical HIPERLAN/2 scenarios,? ETSI/BRAN document no. 3ERI084A. I have seen these refrences in many IEEE and ETSI documents but I am unable to find...

## Mistakes in the DVB-T standard?

inHi, Are there any DVB-T experts around? I found something weired in ETSI EN 300744 v.1.5.1 (2004-11) and want to have verifications for my...

Hi, Are there any DVB-T experts around? I found something weired in ETSI EN 300744 v.1.5.1 (2004-11) and want to have verifications for my suspect. I implemented a DVB-T receiver according to the DVB-T physical layer standard ETSI EN 300744 v.1.5.1 (2004-11) but it does not work with real signals in the air. It turns out that R'i and Ri in the bit permutation in the symbol interleaver is exc...

## How to get the standard of Hiperlan/2 for channel model

inHi, I want to find the channel model of Hiperlan2. Every source I get points to ESTI's website:www.etsi.org. Although I have tried...

Hi, I want to find the channel model of Hiperlan2. Every source I get points to ESTI's website:www.etsi.org. Although I have tried several times in that website, no such file can be got. Can you help me? Difference sources say the same thing: Medbo, P.Schramm "Channel Models for HIPERLAN/2" ETSI/BRAN document no. 3ERI085B,1998 Thanks in advance

## realistic implementation of ETSI/BRAN Indoor Model A channel Matlab

inI want to do a realistic implementation of ETSI/BRAN Indoor Model A channel , i have the delays for the paths and the Average Relative Power (dB)...

I want to do a realistic implementation of ETSI/BRAN Indoor Model A channel , i have the delays for the paths and the Average Relative Power (dB) and i want to create time varying channel please help _____________________________ Posted through www.DSPRelated.com

## ETSI intrinsic for Android NDK (basic operations)

inI am looking for ETSI intrinsic for Android NDK (basic operations). ARM has such in the form of dspfns.h file, but its code is not suitable for...

I am looking for ETSI intrinsic for Android NDK (basic operations). ARM has such in the form of dspfns.h file, but its code is not suitable for NDK (uses __asm{} rather than asm() etc.). The ARM __asm{} can specify a variable name, while the asm() can specify a register. How can I specify C variable into asm() ? Is there anything like _NASSERT for NDK? Thanks, AM

## ETSI basic operation: meaning of L_sub_c

I'm looking for an authoritative definition of the ETSI basic operation L_sub_c, specifically the sense of the Carry flag on input and...

I'm looking for an authoritative definition of the ETSI basic operation L_sub_c, specifically the sense of the Carry flag on input and output. I have the AMR codec reference C code, but L_sub_c is commented as subtracting input carry and then does the opposite (i.e. subtracts invertse of input carry). Also I would expect to use two L_sub_c's in the obvious way to do a 64-bit subtraction, ...

## 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...

## Channel model

inHi, I'm currently develop a DVB-S2 demodulator, and I want to know how to get the channel model (written in matlab or c etc.). I've been told...

Hi, I'm currently develop a DVB-S2 demodulator, and I want to know how to get the channel model (written in matlab or c etc.). I've been told that the standart organization (i.e., ETSI on my case) may supply something like that, but unfortunatley I've could not find it. Please help me! :) Moshe.

## AMRWB+ Source Code

inCould someone tell me where on the 3GPP site is the "AMRWB+ reference code" . . . we're evaluating it. I've downloaded the only C sources I...

Could someone tell me where on the 3GPP site is the "AMRWB+ reference code" . . . we're evaluating it. I've downloaded the only C sources I could find (ts_126073v070000p0.zip) from the ETSI site. Thanks in advance and regards, J

## AMR codec implementations

inHi, I am looking at running the AMR 3GPP codec on an ARM9TDMI platform. This not strictly a DSP, but I've looked around and I haven't seen...

Hi, I am looking at running the AMR 3GPP codec on an ARM9TDMI platform. This not strictly a DSP, but I've looked around and I haven't seen much about AMR except the ETSI reference codec so I thought I could ask here. My question is - has anybody seen a fixed-point 32-bit implementation of the AMR reference source anywhere on the net ? It does not have to be optimized (or bit-exact for that...

## CPFSK receiver architecture

inI'm evaluating receiver structures for the ETSI DMR spec, but not having much luck finding any work in this area. They use continuous...

I'm evaluating receiver structures for the ETSI DMR spec, but not having much luck finding any work in this area. They use continuous phase modulation, so I anticipate I'll have to use a viterbi demodulator to get it done. Unfortunately they choose h=.27, so I have at least 200 states, times whatever number of symbol cycles their pulse shape is over (not clear on this, three maybe?). So I'm loo...

## AMR-Codec / Patent?

inHello! Does anyone know about a patent on the AMR codec? And if a patent exists - who is contact for licensing? On the ETSI IPR search...

Hello! Does anyone know about a patent on the AMR codec? And if a patent exists - who is contact for licensing? On the ETSI IPR search there's only mentioned that "Ericsson claims to have some patents (pending) around AMR". The ANSI C code example from 3GPP (26.073) is completely without any notice of patents, copyright or licence. I'm happy for *any* answer on this! Thanks, ...

## Recovery of IQ modulation frequency (DVB-T)

inHello, I am a bit unsure how the demodulator recovers the original IQ modulation frequency of a DVB-T baseband signal. In the standard the...

Hello, I am a bit unsure how the demodulator recovers the original IQ modulation frequency of a DVB-T baseband signal. In the standard the frequency "fc" is (IMHO) not specified, however there could be read (ETSI EN 300 744 V1.5.1 (2004-06), Page 45) "A subsequent up-conversion process then gives the real signal s(t) centred on the frequency fc". So it should be correct to look for the "ce...

## DVB-H OFDM matlab Question

Hello I am working on simulating DVB-H 4k mode according to ETSI standard. According to the standard i am populating 3024 data carriers with...

Hello I am working on simulating DVB-H 4k mode according to ETSI standard. According to the standard i am populating 3024 data carriers with QPSK. I am trying to validate the simulation by measuring the BER before Vit&RS decoding and comparing to standard Eb/No qpsk curves. The problem is that I am using the MATLAB AWGN function with SNR from 0to12dB and the flag 'measured'. I would like to know ...

## DSP fixed-point math library

inIs there fixed-point math library (preferably as inline functions or macros) such as the one defined by European Telecommunications Standards...

Is there fixed-point math library (preferably as inline functions or macros) such as the one defined by European Telecommunications Standards Institute (ETSI) and used in in GSM 06.06 and other standard vocoders - available for: 1. ADI's BlackFin? 2. IBM PowerPC? 3. Intel Pentium? 4. TI DSP? If so, please provide me with the link for download etc. Thanks, GM

## Problems about continual pilots in DVB!

Hi,everybody! In ETSI EN 300 744,it is abviously that the freqency domain continual pilot carriers are NOT equidistant,in 2k mode,they are...

Hi,everybody! In ETSI EN 300 744,it is abviously that the freqency domain continual pilot carriers are NOT equidistant,in 2k mode,they are [0,48,54,87, 141,156,192,...],and I can not see any rule! why so? I think: The pilots are "boosted",so, with frequency domain correlation on the OFDM symbol, is it possible to extract freq.offset if it is high? Is that the reason why continual pilot...

## urgent: modulation normalisation factor

Hi friends, I have a big question in my head. The solution of this problem is very important for me as my supervisor waiting for my response....

Hi friends, I have a big question in my head. The solution of this problem is very important for me as my supervisor waiting for my response. Please help me!!! Here is my question. I read in HIPERLAN/2 physical layer ETSI/BRAN in part: signal constellation and mapping. They mention about this sentence: The normalization factor KMOD depends on the modulation. The purpose of the normal...

## Power Delay Profile

hi everybody, i'm trying to generate an etsi filter in order to simulate a channel. I did it but there is still one problem, i don't manage to...

hi everybody, i'm trying to generate an etsi filter in order to simulate a channel. I did it but there is still one problem, i don't manage to take in account taps delays.. I read on the net we have to use the power delay profile of the filter but i'm not able to manage to coding of this method. I found a matlab script, can you tell me what do you think about: I don't understand the aim of th...

## 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!!