Generating a constant source for Channel gain/fading estimation

I am using Labview Communication Design suite for programming USRP RIO.
I want to measure channel gain between RX-TX pair for which I plan to send a stream of 1111111 and see the received envelope( without modulating for now).
Since such source for Sin wave was available I thought of generating 1111 stream using 1= sin(m)/sin(m) as per follwing design or 1= sin(m)-sin(m) +1
The issue is though I can see that the waveform entering USRP as data to be streamed is a DC level but at reception side I am getting a sin wave!!
for TX side being:-
Receiver USRP should actually receive a faded random channel for transmitted sequence of 111111! I cannot explain the behaviour!
Even the frequency of Sin wave recived varies with the amplitude of the DC multiplier!
Please help explain the situation.

Hello Wired_,
Can you please provide me with a little more information on how you are recording in the TX data? How are you demodulating the signal? Why are you expecting it to be a faded DC value? Which sine wave generator are you referring too? The carrier frequency or the waveform generator VI in LabVIEW?
I would expect the output of the TX to be the carrier frequency tone, with an amplitude dependent on the DC level.
If you have hardware specific questions, I recommend posting them to the SDR forum.
Regards,

Similar Messages

Generating Constant Source for Channel Gain Measurement

I need a contant source say a DC level which shall I transmit over a channel to get channel gain/ fading over few transmission blocks.
I tried a naive approach of getting a constant by DC_m= m*sin(t)/sint(t) and sin(t)-sin(t) +m
through follwing design.
Though I can see a constant DC in waveform_graph 3 but when I receive the data from RX port of USRP RIO, which I expected to be a faded DC value, I am getting a sign wave whose frequency is dependent on the tone frequency of the Sin wave generator.
I cannot explain this!!
My purpose if to get channel gain between RX-TX pair and TX-Eavedropper pair. Do I need to implement dedicated channel sounder based on PN sequqnece correlator? or this approach of H_ab= Y/X shall work. I negated X as it would need perfect synchronization between RX-TX pair for channel gain estimation.
Any suugestion on the anomaly? Or suggestion on implementing channel gain measurement using Comm suite.

Hello Wired_,
Can you please provide me with a little more information on how you are recording in the TX data? How are you demodulating the signal? Why are you expecting it to be a faded DC value? Which sine wave generator are you referring too? The carrier frequency or the waveform generator VI in LabVIEW?
I would expect the output of the TX to be the carrier frequency tone, with an amplitude dependent on the DC level.
If you have hardware specific questions, I recommend posting them to the SDR forum.
Regards,

Unable to generate "Export data source" for Master data infoobject

Hi Gurus,
I'm in BW 3.5
I need to generate "Export data source" for a master data info object.
I followed below steps:
I ticked the checkbox "Characterist. is export data source" in the master data Info object maintenance screen.
In the Infosource area, for the desired Infoobject --> Right click --> Generate export datasource --> a dialog box displays saying "The generation of DataSource was successful"
Problem:
Even after refreshing, etc.. I couldn't find the generated datasource 8**** for the above master data. I also tried to replicate the datasource from the myself source system, but couldn't find it even there. I don't know where the generated export data source is hiding ???
Could anyone please help ????
Thanks,
Venkat

Hi Venkat,
I guess that after creating an export datasource for infoobject this DS should appear in the RSA1-Source systems - MYSELF - datasource overview (with name starting with 8). Since it's a datamart, it should appear also as system generated infosource. And in this case you would be able to assign in URs of data target the appropriate infosource (make sure that in Infoproviders tab of RSA1 you have inserted your infoobject as a data target).
However, there are some bugs related to export data source. CHeck if you see you export data source in RSA6.
If you don't see it - consider applying OSS Note #816892 - "30BSP26: Export DS for master data is not generated".
Note #876845 - "30BSP29: InfoObject change: Export DataSource not adjusted" is also may be useful.
-Vikram

Need urgent help to generate SPL Data Sources for Line Items

Hi All,
I am trying to extract the Special Purpose Ledger Data from R/3 into BW. To do this, I am following the steps to generate the Data Sources for Totals table and Lien Items Table.
Using Transaction BW01 and BW03 on the R/3 side, I am able to generate the Totals Record-DataSource successfully.
But I am not able to generate the Line Items-DataSource. I am using the same procedure.
Can someone please help me or point me in the right direction. Are there any other settings I need to make to generate the Line Items-DataSource. Interestingly, I am able to generate the Line Items-DataSource for some other old ledgers in the System like ZZ and ZX. But I need the Line Items-DataSource from a ledger called ZP for which I am having trouble.
I would greatly appreciate if someone can get back to me ASAP.

During BW01, The Generate extract structure is fine for both Total and Line Item Table.The issue is when we run tcode bw03 where you assign the datasource to a ledger.
Here, I can assign only for the Total Records data source and NOT for the Line Items-DataSource.
I hope I could explain the issue. Looking forward for some advice.

How to generate data source for classification data

Hi all,
I would like to know how to generate a data source for material classification data .
Thanks
OJB

http://www.mycomputerfiles.com/BW35_SAP/BW_expert_online_docs/Volume_02_2004/Issue_08_September/Understand%20the%20R3%20Classification%20System%20and%20How%20to%20Extract%20.doc
http://affine.co.uk/cms/uploads/How_to_Extract_Classification_Data_into_BW.pdf
hope it helps,
Alex
Edited by: Alex M on Jan 4, 2011 9:28 AM

Line Items Data Source for General Ledger

Hello everybody,
I'm trying to generate a Data Source for Line Items (new General Ledger) in transaction FAGLBW03. When I generated a Total Record-Data Source, everything was done correctly. When I try to generate a Line Item-Data Source, I receive following error message: "Extractors for general ledger documents are not yet supported". I was looking for any SAP notes that would explain this issue, but I couldn't find anything.
Could you please tell me how can I generate Data Source for Line Items? Add some SP, use some another transaction, ...?
Thank you for any help
Janule

Hi,
Can u tell me how did u solve that problem.
i m facing same.
/sachinkumar.

Data source for new FIGL

Hi:
I generated the data source for the totals records of FIGL( new ).
But how to get the data source for line items?
Should I still use the 0FI_GL_4 for that?
Thanks.
Eric

N0 you need to create ur own generic datasource for line items - it is not delivered.
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Doubt in Generic data sources for hierarchy & text

Hi All,
I have a couple of doubts as mentioned below.
1 . Why we canu2019t generate generic data source for hierarchy?
2. While creating Generic datasource for text there is one more option is available i.e. "Extraction from domain"
what is domian please explain .
Thanks & Regards,
Saurabh Bansal

Hi,
1.We can't maintain Hierarchies in ECC, Because the Database design of the OLTP system is based on ERM(Entity Relationship Model),i.e Tables are connected via Primary and Foriegn key relationships, Whenever we need 1: Many connection divide the data in different tables,connect them using the primary and foriegn key relationships.
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ERROR WHEN GENERATING EXPORT DATA SOURCE

Dear Members,
I am getting an error when generating export data source for Info Cube. I'm creating an Info Cube based on already existed info cube. Literally I am copying all the settings of an info cube to new Info Cube. The scenario is to load the data from one Info Cube to the other. The creation of Info Cube from an Info Cube is successful. But the problem is when I am generating export data source the following error is occurred.
Error: Data Source 81c_svrr does not exist in source system B3TCLNT800 of version A.
what could be the reason for the error?
Please let me know.
Thanks in advance.

Dear Venkat,
The problem is because of error in the Myself Connection , Check the Myself connection in the source systems and the activate and restore the connection and try, it should work..
Thanks,
Krish

Generate Export Data Source

Hi,
Why Generated Data Source is available for ODS with out doing the Generate Export Data Source on ODS. But it is not available for Infocube.
Is it neccessory to do Generate Export Data Source for ODS.
But with out doing this we can also able to use the Generated Data Source.
G K Reddy

Hi,
It is not needed to generate the "export datasource" on ODS again as it automatically creates one. Yes u can use the generated one with out manually generating it.
To see the generated datasource , RSA1->Modelling->Infosources.
From trhe menu click on Settings -> Display generated objectes-> select "show generated ODS objects". Then you can find ur generated datasource on ODS.
Hope this helps,
Shylaja.

Help: How do you keep the generated source for the servicegen-generated stuff?

Only the following classes have corresponding Java files:
<name>Service
<name>Service_Impl
<name>ServicePort
<name>ServicePort_Stub
I need access to the marshalling code for the DTO java classes (I think there is
a bug).
Is there a keepGenerated option?
Thanks,
Nick

I found the problem. I have posted it. See here:
http://newsgroups2.bea.com/cgi-bin/dnewsweb?cmd=article&group=weblogic.developer.interest.webservices&item=1014&utag=
Cheers,
Nick
"Nick Minutello" <[email protected]> wrote:
>
>
Actually, you are right - the source for the codecs can be found in the
webservice
WAR. However, I have a funny feeling that the two are not the same (ie,
there is
a difference between the classes in the war, the classes in the client jar
generated
by servicegen and the client jar generated by clientgen. I am getting some
odd behaviour,
and I havent gotten to the bottom of it yet.
It seems for the Data Transfer Objects, it makes a difference whether you
use the
generated classes or the originals (I am using the useServerTypes="True"
option in
the client element of the servicegen task.
-Nick
"Neal Yin" <[email protected]> wrote:
Actually, the behavior right now should be "always keepgenerated". Canyou
post your EJB/javaclass? We can check it out.
-Neal
"Nick Minutello" <[email protected]> wrote
in message news:[email protected]...
Actually, I think this is critical that this is done asap.
It is impossible to debug errors such as this without it!
java.lang.NoSuchMethodError
atcom.x.bond.view.BondDetailDTOCodec.typedInvokeSetter(BondDetailDTOCodec.java
:1214)
atcom.x.bond.view.BondDetailDTOCodec.invokeSetter(BondDetailDTOCodec.java:964)
Any chance of a timeframe?
I dont particularly want to go and use Axis unless I have to... but Iseem
to be
spending a lot of time debugging this weblogic soap implementation...
Thanks.
Regards,
Nick
"Neal Yin" <[email protected]> wrote:
Sorry, we don't have a keepgenerated option yet. We are adding one.
Could you post what bug you think we might have? We can help you to
pass
though it.
Thanks,
-Neal
"Nick Minutello" <[email protected]>
wrote
in message news:[email protected]...
Only the following classes have corresponding Java files:
<name>Service
<name>Service_Impl
<name>ServicePort
<name>ServicePort_Stub
I need access to the marshalling code for the DTO java classes (I
think
there is
a bug).
Is there a keepGenerated option?
Thanks,
Nick

How to generate a SSL certificate for Adobe Connect?

My organization uses adobe connect across the internet and we
would like to enable SSL on the server. I have instructions for
enabling SSL once a CSR is generated, but I do not know how to
actually generate the CSR using Adobe Connect.
Any info on how to generate a SSL CSR would be great,
thanks.

There is no 'built-in' method in Connect to do this. We used
a open-source product called OpenSSL to generate our CSR file for
Connect. Just Google OpenSSL and download/install it (it's free).
Then use something like this command for creating a cert:
openssl
req -new -key <exisiting private key file> -out <csr
file you want to make>
Example:
OpenSSL> req -new -key privatekey.pem -out connectcert.csr
After you get the new certificate from the CA, put in
d:\breeze directory. Then update the adaptor.xml file with the new
cert name (make sure backup the existing file).
Make sure you REBOOT the server to enable changes! Simply
restarting services will not work.
Hope this helps!

Trying to change the data source for a Crystal Report.

The method below represents my best attempt to programatically change the data source of a Crystal Report. The goal is to have a routine that will update the data source for reports after they have been distributed to production servers. So far I have not been successful in saving the report back to the CMS. No exceptions are thrown, but when I view the Database Configuration of the report in the CMC nothing has changed.


Am I missing a step, or is there another way to accomplish this?


Thank you.

<hr />
<pre>
private void test(String reportName)
 throws SDKException, ReportSDKException, java.io.IOException
 IInfoObjects newInfoObjects;
 IInfoObject reportObj;
 ReportClientDocument clientDoc = new ReportClientDocument();
 DatabaseController dc;
 PropertyBag pBag;
 PropertyBag logonProps;
 ConnectionInfo newConInfo;
 ConnectionInfo oldConInfo;
 ConnectionInfos conInfos;
 int connOptions = DBOptions._ignoreCurrentTableQualifiers + DBOptions._doNotVerifyDB; //0;
 Fields connFields = null;
 String queryStr = "Select * From CI_INFOOBJECTS " +
 "Where SI_NAME='wfr.rpt' AND SI_KIND='CrystalReport' AND SI_INSTANCE=0";
 newInfoObjects = getCms().executeQuery(queryStr);
 if(newInfoObjects.size() > 0)
 reportObj = (IInfoObject)newInfoObjects.get(0);
 try
 clientDoc = getCms().getReportAppFactory().openDocument(
 reportObj
 , OpenReportOptions._refreshRepositoryObjects
 , java.util.Locale.US);
 dc = clientDoc.getDatabaseController();
 conInfos = dc.getConnectionInfos(null);
 for(int i = 0; i < conInfos.size(); ++i)
 oldConInfo = (ConnectionInfo)conInfos.getConnectionInfo(i);
 newConInfo = (ConnectionInfo)oldConInfo.clone(true);
 pBag = newConInfo.getAttributes();
 pBag.putStringValue("QE_ServerDescription", "alio");
 logonProps = new PropertyBag();
 logonProps.putStringValue("Trusted_Connection", "false");
 logonProps.putStringValue("Server", "alio");
 pBag.put("QE_LogonProperties", logonProps);
 newConInfo.setUserName("admin");
 newConInfo.setPassword("password");
 dc.replaceConnection(
 oldConInfo
 , newConInfo
 , connFields
 , connOptions);
 catch(ReportSDKServerException Ex)
 String msg = "A server error occured while processing the " + reportObj.getKind()
 + " object, " + reportObj.getTitle() + " (" + reportObj.getCUID() + "), from the CMS.";
 Utility.errorOut(msg, Ex);
 catch(Exception Ex)
 String msg = "An error occured while processing the " + reportObj.getKind()
 + " object, " + reportObj.getTitle() + " (" + reportObj.getCUID() + "), from the CMS.";
 Utility.errorOut(msg, Ex);
 finally
 clientDoc.save();
 getCms().commitToInfoStore(newInfoObjects);
 clientDoc.close();
</pre>
Edited by: Mark Young on Sep 10, 2009 2:16 PM

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Justin,

Thank you for the reply. Time constraints have not allowed me to post back to this tread
till now. I will try your suggestion. My assumption is that Save the report back to the
info store refers to IInfoStore.commit(IInfoObjects).


I'm afraid that I do not understand why I don't want to change the report client document,
or why successfully exporting the report with the new login/password is not what I
want to do. Any explanation on that statement would be appreciated.


I did find a way to accomplish my goal. It involved adding the SSOKEY property to the
logon property bag. Below you'll see my revised code which modifies the report logon and
server. I have no idea what
this does, and SAP support has not been able to tell me why it works. However, what I
discovered is that if I changed the report option, Database Configuration -> When
viewing report:, in the CMS to Use same database logon as when report
is run from Prompt the user for database logon, then the
SSOKEY property had been added to the logon property bag having an empty string as its
value. This allowed me to successfullyupdate and save the modified logon back to the CMS.


So I took a chance and added code to always add the SSOKEY property with an empty string
as its value, and I could then successfully modify and save the report's logon info
and server. Again, I don't know what this means, but it has worked so far. If anyone has
some insight or comments, either are welcome. Thank you in advance.

 
<hr />
<pre>
private void changeDataSourceOfAWFCrystalReports()
 throws SDKException, ReportSDKException, java.io.IOException
 IInfoObjects newInfoObjects = null;
 IInfoObject reportObj = null;
 IReport curReport = null;
 ReportClientDocument clientDoc = new ReportClientDocument();
 DatabaseController dbController;
 PropertyBag pBag;
 PropertyBag logonProps;
 ConnectionInfo newConInfo;
 ConnectionInfo oldConInfo;
 ConnectionInfos conInfos;
 int connOptions = DBOptions._ignoreCurrentTableQualifiers + DBOptions._doNotVerifyDB;
 Fields connFields = null;
 String outputStr;
 int numOfReports;
 int numOfQueryPages;
 double progressIncrementPerPage = 30;
 int progressIncrementPerReport = 0;
 // Path query to reports is in a .properties file.
 String queryStr = getAppSettingsFile().getWscAwfCrystalReportPathQuery();
 try
 // Executes IInfoStore.getPageingQuery() and generates a list of queries.
 getCms().setPathQueryQueries(queryStr, 100);
 numOfQueryPages = 0;
 // Gets a List<String> of the IPageResult returned from IInfoStore.getPageingQuery().
 if(getCms().getPathQueryQueries() != null)
 numOfQueryPages = getCms().getPathQueryQueries().size();
 if(numOfQueryPages > 0)
 // Use 30% of progress bar for the following loop.
 progressIncrementPerPage = Math.floor(30.0/(double)numOfQueryPages);
 for(int queryPageIndex = 0; queryPageIndex < numOfQueryPages; ++queryPageIndex)
 // Gets the IInfoObjects returned from the current page query
 newInfoObjects = getCms().getPathQueryResultSetPage(queryPageIndex);
 numOfReports = newInfoObjects.size();
 if(newInfoObjects != null && numOfReports > 0)
 progressIncrementPerReport =
 Math.round((float)Math.floor(progressIncrementPerPage/(double)numOfReports));
 for(int reportIndex = 0; reportIndex < numOfReports; ++reportIndex)
 reportObj = (IInfoObject)newInfoObjects.get(reportIndex);
 curReport = (IReport)reportObj;
 clientDoc = getCms().getReportAppFactory().openDocument(
 reportObj
 , OpenReportOptions._refreshRepositoryObjects
 , java.util.Locale.US);
 dbController = clientDoc.getDatabaseController();
 conInfos = dbController.getConnectionInfos(null);
 for(int conInfosIndex = 0; conInfosIndex < conInfos.size(); ++conInfosIndex)
 oldConInfo = (ConnectionInfo)conInfos.getConnectionInfo(conInfosIndex);
 newConInfo = (ConnectionInfo)oldConInfo.clone(true);
 pBag = newConInfo.getAttributes();
 pBag.putStringValue(
 "QE_ServerDescription"
 ,getConfigFile().getDBDataSourceConnections());
 logonProps = new PropertyBag();
 logonProps.putStringValue("Trusted_Connection", "false");
 logonProps.putStringValue("SSOKEY", "");
 logonProps.putStringValue(
 "Server"
 ,getConfigFile().getDBDataSourceConnections());
 pBag.put("QE_LogonProperties", logonProps);
 newConInfo.setUserName(getConfigFile().getUNVConnectionUserName());
 newConInfo.setPassword(getConfigFile().getUNVConnectionPasswordDecrypted());
 dbController.replaceConnection(
 oldConInfo
 , newConInfo
 , connFields
 , connOptions);
 newConInfo = (ConnectionInfo)conInfos.getConnectionInfo(conInfosIndex);
 } // end for on conInfosIndex
 clientDoc.save();
 } // end for on reportIndex
 } // end if on newInfoObjects
 } // end for on queryPageIndex
 } // end try
 catch(ReportSDKServerException Ex)
 // handle...
 catch(Exception Ex)
 // handle...
 finally
 getCms().commitToInfoStore(newInfoObjects);
 if(clientDoc != null)
 clientDoc.close();
</pre>

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Dear All
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Please help me,
Thank you,
Anh Duong

Generating a constant source for Channel gain/fading estimation

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