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https://designers-guide.org/forum/YaBB.pl Simulators >> RF Simulators >> Multi-carrier simulation https://designers-guide.org/forum/YaBB.pl?num=1257156263 Message started by sandman on Nov 2nd, 2009, 2:04am |
Title: Multi-carrier simulation Post by sandman on Nov 2nd, 2009, 2:04am Hi all, I'm trying to simulate worst case PAPR for a multi-mode tx which can simultaneously tx combinations of GSM/EDGE, WCDMA/HSPA and LTE. The carriers could be any combinations of GSM carriers (>1), WCDMA (>1) and LTE carriers, in the same band. I have a setup for MC-WCDMA (MC=MultiCarrier) running in ADS and I can perform measurements like CCDF (and very soon ACLR) on the combinations of carriers. However, I'm trying to figure out if anyone has any experience on co-simulation MC-GSM, MC-WCDMA and LTE on the same template and if they could provide some advise on the same (do's, don't's etc.)? Any input are welcome!! Cheers! |
Title: Re: Multi-carrier simulation Post by pancho_hideboo on Nov 3rd, 2009, 5:26am sandman wrote on Nov 2nd, 2009, 2:04am:
Please describe your question in detail. |
Title: Re: Multi-carrier simulation Post by sandman on Nov 5th, 2009, 2:03am Sorry, reading that again, it does sound a bit unclear to me too. Anyway - I'm trying to simulate a multi-mode transmitter chain. I need to be able to generate signals of multiple carriers of each - GSM/EDGE and WCDMA/HSPA, and LTE together (i.e. on the same design schematic, if that is possible). I'm trying to measure the combined PAPR (via CCDF) of all of these carriers together. If it is not possible to simulate it together, I'd like to be able to generate them seperately and then add them together, so it appears like I'm transmitting all of the above signals through the same RF+Baseband transmit chain. Essentially, I'm trying to see what my multi-mode transmitter spec. would need to be, if I tx GSM/EDGE, WCDMA/HSPA and LTE carriers at the same time, if that's possible at all. Is this possible in ADS or Matlab ? If not, why and if yes, how - what kind of sampling rates will I have to use, what kind of filtering will I need to use etc. ? Hope that gives more detail. |
Title: Re: Multi-carrier simulation Post by pancho_hideboo on Nov 8th, 2009, 12:29am Why do you post in RF Simulators ? Is there any relation to RF Simulators ? sandman wrote on Nov 5th, 2009, 2:03am:
Still no one can understand a meaning of your sentences. sandman wrote on Nov 5th, 2009, 2:03am:
DUT's schematic ? Full Testbench schematic including DUT and Vector Signal Analyzer ? You mean that you want to generate one combined signal of three mode signals with different carriers by only one DUT ? Show me your diagram of measurement using DUT and actual instruments such as Vector Signal Analyzer. Learn measurements using actual instruments. Not "EDA Tool Play". sandman wrote on Nov 5th, 2009, 2:03am:
sandman wrote on Nov 5th, 2009, 2:03am:
sandman wrote on Nov 5th, 2009, 2:03am:
I can understand "the same RF". However what do you mean by "Baseband" ? You mean DAC and programmable Digital Filter ? Or only DAC with other all signal processing by DSP ? sandman wrote on Nov 5th, 2009, 2:03am:
Do you mean truely MATLAB ? I can't understand your questions. But I think it is possible using any of Agilent Ptolemy, Agilent SystemVue, Mathworks Simulink, CoWare SPD(SPW), etc. I recommend you to use Agilent SystemVue not Agilent Ptolemy. Currently main stream of ESL(Electronic System Level) design tool of Agilent is SystemVue not Ptolemy. I can't expect any progress of Ptolemy any more. sandman wrote on Nov 5th, 2009, 2:03am:
Your schematic includes only behavioral model ? What do you mean by "filtering" ? There are many filtering used in Transmitter signal path. Where is location of "filtering" in Transmitter signal path ? The followings are general notes. - Use correct terminologies. - Warnigns are different from Errors. - ADS is not name of simulator. - There is no tool which name is Cadence. - All gains in Direct Plot of Cadence ADE are "right", "true" and "practical" voltage gain. - MATLAB are different from Simulink. - Learn measurements using actual instruments. Not "EDA Tool Play". |
Title: Re: Multi-carrier simulation Post by sandman on Nov 8th, 2009, 6:23am Quote:
Learn measurements using actual instruments. Not "EDA Tool Play". Quote:
sandman wrote on Nov 5th, 2009, 2:03am:
Quote:
sandman wrote on Nov 5th, 2009, 2:03am:
Quote:
I can understand "the same RF". However what do you mean by "Baseband" ? You mean DAC and programmable Digital Filter ? Or only DAC with other all signal processing by DSP ? Quote:
I can't understand your questions. But I think it is possible using any of Agilent Ptolemy, Agilent SystemVue, Mathworks Simulink, CoWare SPD(SPW), etc. I recommend you to use Agilent SystemVue not Agilent Ptolemy. Currently main stream of ESL(Electronic System Level) design tool of Agilent is SystemVue not Ptolemy. I can't expect any progress of Ptolemy any more. Quote:
sandman wrote on Nov 5th, 2009, 2:03am:
Your schematic includes only behavioral model ? What do you mean by "filtering" ? Where is location of "filtering" in Transmitter signal path ? The followings are general notes. - Use correct terminologies. - Warnigns are different from Errors. - ADS is not name of simulator. - There is no tool which name is Cadence. - All gains in Direct Plot of Cadence ADE are "right", "true" and "practical" voltage gain. - MATLAB are different from Simulink. - Learn measurements using actual instruments. Not "EDA Tool Play Quote:
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Title: Re: Multi-carrier simulation Post by pancho_hideboo on Nov 8th, 2009, 6:34am sandman wrote on Nov 8th, 2009, 6:23am:
If you use enough broad Vector signal Generator and both carrier separation and modulation bandwidth are not so wide and required ACLR is not so large, you can generate multi-carrier signal by using only one Vector signal Generator. It is also very true for simulation costs and efficiency. sandman wrote on Nov 8th, 2009, 6:23am:
About latter, you don't have to care about DAC resolution in Simulation Domain if you use double precision expression without quantization. sandman wrote on Nov 8th, 2009, 6:23am:
Simulation Domain is very related to actual Measurement. If you can understand actual hardware or actual instruments correctly and properly, strategy of simulation is straight forward. sandman wrote on Nov 8th, 2009, 6:23am:
I can't understand difference between "I'd like to" and "I'd like to be able to". sandman wrote on Nov 8th, 2009, 6:23am:
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