Hi Experts, Could any of you provide me with some references/ links on how to model HAM radio interference so that I could write them in terms of code(C, MATLAB, etc...)?? As i have search the internet for related doc, but no progress...Most paper only give recommendation on how to cancel them...Thanks in advance!! =)
modelling of HAM radio interference
Started by ●August 7, 2007
Reply by ●August 7, 20072007-08-07
lost_grad wrote:> Hi Experts, > > Could any of you provide me with some references/ links on how to model > HAM radio interference so that I could write them in terms of code(C, > MATLAB, etc...)?? As i have search the internet for related doc, but no > progress...Most paper only give recommendation on how to cancel > them...Thanks in advance!! =) > >There are many kinds of interference, which fall into two general categories: QRM (interference from other communications) and QRN (noise). For QRN there are many possible sources of noise, both man-made and natural, and each one would probably need to be modelled separately. Did you have a specific kind of interference in mind ? Paul
Reply by ●August 7, 20072007-08-07
>lost_grad wrote: >> Hi Experts, >> >> Could any of you provide me with some references/ links on how tomodel>> HAM radio interference so that I could write them in terms of code(C, >> MATLAB, etc...)?? As i have search the internet for related doc, butno>> progress...Most paper only give recommendation on how to cancel >> them...Thanks in advance!! =) >> >> > >There are many kinds of interference, which fall into two general >categories: QRM (interference from other communications) and QRN >(noise). For QRN there are many possible sources of noise, both man-made>and natural, and each one would probably need to be modelled separately.>Did you have a specific kind of interference in mind ? > >PaulHi Paul, I was reading some paper related to DSL subjected to HAM radio interference so I'm trying to generate the HAM radio signal to test out my way of cancelling the HAM radio signal. So which do you think would fit into my requirements?? Thanks!!!
Reply by ●August 8, 20072007-08-08
lost_grad wrote:>> lost_grad wrote: >>> Hi Experts, >>> >>> Could any of you provide me with some references/ links on how to > model >>> HAM radio interference so that I could write them in terms of code(C, >>> MATLAB, etc...)?? As i have search the internet for related doc, but > no >>> progress...Most paper only give recommendation on how to cancel >>> them...Thanks in advance!! =) >>> >>> >> There are many kinds of interference, which fall into two general >> categories: QRM (interference from other communications) and QRN >> (noise). For QRN there are many possible sources of noise, both man-made > >> and natural, and each one would probably need to be modelled separately. > >> Did you have a specific kind of interference in mind ? >> >> Paul > > Hi Paul, > > I was reading some paper related to DSL subjected to HAM radio > interference so I'm trying to generate the HAM radio signal to test out my > way of cancelling the HAM radio signal. So which do you think would fit > into my requirements?? >OK - you mean interference _from_ ham radio signals, interfering with some other system ? This is known as RFI. I think you probably need to explain a little more clearly and in greater detail what it is that you really want to do. Paul
Reply by ●August 8, 20072007-08-08
>lost_grad wrote: >>> lost_grad wrote: >>>> Hi Experts, >>>> >>>> Could any of you provide me with some references/ links on how to >> model >>>> HAM radio interference so that I could write them in terms ofcode(C,>>>> MATLAB, etc...)?? As i have search the internet for related doc, but >> no >>>> progress...Most paper only give recommendation on how to cancel >>>> them...Thanks in advance!! =) >>>> >>>> >>> There are many kinds of interference, which fall into two general >>> categories: QRM (interference from other communications) and QRN >>> (noise). For QRN there are many possible sources of noise, bothman-made>> >>> and natural, and each one would probably need to be modelledseparately.>> >>> Did you have a specific kind of interference in mind ? >>> >>> Paul >> >> Hi Paul, >> >> I was reading some paper related to DSL subjected to HAM radio >> interference so I'm trying to generate the HAM radio signal to test outmy>> way of cancelling the HAM radio signal. So which do you think wouldfit>> into my requirements?? >> > >OK - you mean interference _from_ ham radio signals, interfering with >some other system ? This is known as RFI. I think you probably need to >explain a little more clearly and in greater detail what it is that you >really want to do. > >PaulCould you take a look at this example http://www.patentstorm.us/patents/6654430-description.html This implementation is the cancel the HAM radio interference. What I wanna do is to have a model for DSL signal that is subjected to HAM radio interference then with this model, I could then test out my method of cancellation ...Therefore, I have to find a model/way to generate the HAM radio signal...Erm....Hope you get what I'm trying to say...=)>
Reply by ●August 8, 20072007-08-08
>lost_grad wrote: >>> lost_grad wrote: >>>> Hi Experts, >>>> >>>> Could any of you provide me with some references/ links on how to >> model >>>> HAM radio interference so that I could write them in terms ofcode(C,>>>> MATLAB, etc...)?? As i have search the internet for related doc, but >> no >>>> progress...Most paper only give recommendation on how to cancel >>>> them...Thanks in advance!! =) >>>> >>>> >>> There are many kinds of interference, which fall into two general >>> categories: QRM (interference from other communications) and QRN >>> (noise). For QRN there are many possible sources of noise, bothman-made>> >>> and natural, and each one would probably need to be modelledseparately.>> >>> Did you have a specific kind of interference in mind ? >>> >>> Paul >> >> Hi Paul, >> >> I was reading some paper related to DSL subjected to HAM radio >> interference so I'm trying to generate the HAM radio signal to test outmy>> way of cancelling the HAM radio signal. So which do you think wouldfit>> into my requirements?? >> > >OK - you mean interference _from_ ham radio signals, interfering with >some other system ? This is known as RFI. I think you probably need to >explain a little more clearly and in greater detail what it is that you >really want to do. > >PaulCould you take a look at this example http://www.patentstorm.us/patents/6654430-description.html This implementation is the cancel the HAM radio interference. What I wanna do is to have a model for DSL signal that is subjected to HAM radio interference then with this model, I could then test out my method of cancellation ...Therefore, I have to find a model/way to generate the HAM radio signal...Erm....Hope you get what I'm trying to say...=)>
Reply by ●August 8, 20072007-08-08
>lost_grad wrote: >>> lost_grad wrote: >>>> Hi Experts, >>>> >>>> Could any of you provide me with some references/ links on how to >> model >>>> HAM radio interference so that I could write them in terms ofcode(C,>>>> MATLAB, etc...)?? As i have search the internet for related doc, but >> no >>>> progress...Most paper only give recommendation on how to cancel >>>> them...Thanks in advance!! =) >>>> >>>> >>> There are many kinds of interference, which fall into two general >>> categories: QRM (interference from other communications) and QRN >>> (noise). For QRN there are many possible sources of noise, bothman-made>> >>> and natural, and each one would probably need to be modelledseparately.>> >>> Did you have a specific kind of interference in mind ? >>> >>> Paul >> >> Hi Paul, >> >> I was reading some paper related to DSL subjected to HAM radio >> interference so I'm trying to generate the HAM radio signal to test outmy>> way of cancelling the HAM radio signal. So which do you think wouldfit>> into my requirements?? >> > >OK - you mean interference _from_ ham radio signals, interfering with >some other system ? This is known as RFI. I think you probably need to >explain a little more clearly and in greater detail what it is that you >really want to do. > >PaulCould you take a look at this example http://www.patentstorm.us/patents/6654430-description.html This implementation is the cancel the HAM radio interference. What I wanna do is to have a model for DSL signal that is subjected to HAM radio interference then with this model, I could then test out my method of cancellation ...Therefore, I have to find a model/way to generate the HAM radio signal...Erm....Hope you get what I'm trying to say...=)>
Reply by ●August 8, 20072007-08-08
>lost_grad wrote: >>> lost_grad wrote: >>>> Hi Experts, >>>> >>>> Could any of you provide me with some references/ links on how to >> model >>>> HAM radio interference so that I could write them in terms ofcode(C,>>>> MATLAB, etc...)?? As i have search the internet for related doc, but >> no >>>> progress...Most paper only give recommendation on how to cancel >>>> them...Thanks in advance!! =) >>>> >>>> >>> There are many kinds of interference, which fall into two general >>> categories: QRM (interference from other communications) and QRN >>> (noise). For QRN there are many possible sources of noise, bothman-made>> >>> and natural, and each one would probably need to be modelledseparately.>> >>> Did you have a specific kind of interference in mind ? >>> >>> Paul >> >> Hi Paul, >> >> I was reading some paper related to DSL subjected to HAM radio >> interference so I'm trying to generate the HAM radio signal to test outmy>> way of cancelling the HAM radio signal. So which do you think wouldfit>> into my requirements?? >> > >OK - you mean interference _from_ ham radio signals, interfering with >some other system ? This is known as RFI. I think you probably need to >explain a little more clearly and in greater detail what it is that you >really want to do. > >PaulCould you take a look at this example http://www.patentstorm.us/patents/6654430-description.html This implementation is the cancel the HAM radio interference. What I wanna do is to have a model for DSL signal that is subjected to HAM radio interference then with this model, I could then test out my method of cancellation ...Therefore, I have to find a model/way to generate the HAM radio signal...Erm....Hope you get what I'm trying to say...=)>
Reply by ●August 8, 20072007-08-08
>lost_grad wrote: >>> lost_grad wrote: >>>> Hi Experts, >>>> >>>> Could any of you provide me with some references/ links on how to >> model >>>> HAM radio interference so that I could write them in terms ofcode(C,>>>> MATLAB, etc...)?? As i have search the internet for related doc, but >> no >>>> progress...Most paper only give recommendation on how to cancel >>>> them...Thanks in advance!! =) >>>> >>>> >>> There are many kinds of interference, which fall into two general >>> categories: QRM (interference from other communications) and QRN >>> (noise). For QRN there are many possible sources of noise, bothman-made>> >>> and natural, and each one would probably need to be modelledseparately.>> >>> Did you have a specific kind of interference in mind ? >>> >>> Paul >> >> Hi Paul, >> >> I was reading some paper related to DSL subjected to HAM radio >> interference so I'm trying to generate the HAM radio signal to test outmy>> way of cancelling the HAM radio signal. So which do you think wouldfit>> into my requirements?? >> > >OK - you mean interference _from_ ham radio signals, interfering with >some other system ? This is known as RFI. I think you probably need to >explain a little more clearly and in greater detail what it is that you >really want to do. > >PaulCould you take a look at this example http://www.patentstorm.us/patents/6654430-description.html This implementation is the cancel the HAM radio interference. What I wanna do is to have a model for DSL signal that is subjected to HAM radio interference then with this model, I could then test out my method of cancellation ...Therefore, I have to find a model/way to generate the HAM radio signal...Erm....Hope you get what I'm trying to say...=)>
Reply by ●August 8, 20072007-08-08
lost_grad wrote:>> lost_grad wrote: >>>> lost_grad wrote: >>>>> Hi Experts, >>>>> >>>>> Could any of you provide me with some references/ links on how to >>> model >>>>> HAM radio interference so that I could write them in terms of > code(C, >>>>> MATLAB, etc...)?? As i have search the internet for related doc, but >>> no >>>>> progress...Most paper only give recommendation on how to cancel >>>>> them...Thanks in advance!! =) >>>>> >>>>> >>>> There are many kinds of interference, which fall into two general >>>> categories: QRM (interference from other communications) and QRN >>>> (noise). For QRN there are many possible sources of noise, both > man-made >>>> and natural, and each one would probably need to be modelled > separately. >>>> Did you have a specific kind of interference in mind ? >>>> >>>> Paul >>> Hi Paul, >>> >>> I was reading some paper related to DSL subjected to HAM radio >>> interference so I'm trying to generate the HAM radio signal to test out > my >>> way of cancelling the HAM radio signal. So which do you think would > fit >>> into my requirements?? >>> >> OK - you mean interference _from_ ham radio signals, interfering with >> some other system ? This is known as RFI. I think you probably need to >> explain a little more clearly and in greater detail what it is that you >> really want to do. >> >> Paul > > Could you take a look at this example > http://www.patentstorm.us/patents/6654430-description.html > This implementation is the cancel the HAM radio interference. What I wanna > do is to have a model for DSL signal that is subjected to HAM radio > interference then with this model, I could then test out my method of > cancellation ...Therefore, I have to find a model/way to generate the HAM > radio signal...Erm....Hope you get what I'm trying to say...=)Have you tried an RF rejection filter at the receiving end of the DSL line? Ham signals are concentrated in bands. If you know which band contains the offending signal, you should be able to build an adequate analog filter. It works for TV signals too. Jerry -- Engineering is the art of making what you want from things you can get. ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
