Does Anyone read Mr.Harris's book "Multirate signal processing for communication systems"
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From: Zhi.Shen on 19 May 2010 22:54 Hi, I have found a paper to descript the "integrated side-lobe level" exactly. http://ams.confex.com/ams/pdfpapers/123417.pdf ISL's(integrated side-lobe level) definition is also appeared in some others' book, such as Hamish Meikle's book: "Modern radar systems", page 316 http://books.google.com.hk/books?id=mGSE_tmA_HQC&pg=PA316&lpg=PA316&dq=%22integrated+sidelobe+level%22&source=bl&ots=sO1Ej2YtcI&sig=OKqTRf81j4ak5iL8X3ITCo4DqkE&hl=zh-CN&ei=GaD0S7DJB8qOkQXPytzACA&sa=X&oi=book_result&ct=result&resnum=5&ved=0CBwQ6AEwBDgK#v=onepage&q=%22integrated%20sidelobe%20level%22&f=false --- news://freenews.netfront.net/ - complaints: news(a)netfront.net ---
From: dbd on 19 May 2010 23:49 On May 19, 7:40 pm, "Zhi.Shen" <zhi.m.s...(a)gmail.com> wrote: > Thank you ALL! Friends! > I have known the meaning of "integrated side-lobe level" > But who can provide a simple example for the calculation process of > integrated side-lobe level? > ... What have you tried? Dale B. Dalrymple
From: Capt. Convolution on 20 May 2010 18:24 On Thu, 20 May 2010 10:54:15 +0800, "Zhi.Shen" <zhi.m.shen(a)gmail.com> wrote: >Hi, Hello Mr. Shen.Zhi, > I have found a paper to descript the "integrated side-lobe level" exactly. >http://ams.confex.com/ams/pdfpapers/123417.pdf The definition, on page 2, of "integrated side-lobe level" in that PDF file is written in such a vague way that i was not able to understand it. When the author kept referring to a "mainlobe" I could not tell if the author was referring to the spectrum of a filter output signal, or the frequency response of the filter. >ISL's(integrated side-lobe level) definition is also appeared in some >others' book, such as > >Hamish Meikle's book: "Modern radar systems", page 316 >http://books.google.com.hk/books?id=mGSE_tmA_HQC&pg=PA316&lpg=PA316&dq=%22integrated+sidelobe+level%22&source=bl&ots=sO1Ej2YtcI&sig=OKqTRf81j4ak5iL8X3ITCo4DqkE&hl=zh-CN&ei=GaD0S7DJB8qOkQXPytzACA&sa=X&oi=book_result&ct=result&resnum=5&ved=0CBwQ6AEwBDgK#v=onepage&q=%22integrated%20sidelobe%20level%22&f=false That web site appears to be strickly some Asian language. I tried examining the Amazon English version of the book but was unable to learn anything about "integrated side-lobe level". Capt. Convolution
From: dbd on 20 May 2010 20:23 On May 20, 3:24 pm, Capt. Convolution <C.Convolut...(a)aol.com> wrote: >... > > That web site appears to be strickly some Asian language. I tried > examining the Amazon English version of the book but was unable to > learn anything about "integrated side-lobe level". > > Capt. Convolution Have you tried intrgrated sidelobe level on Google? Try equation 1 in: Phase Coded Waveforms for Radar www.mitre.org/work/tech_papers/tech_papers.../05_0112.pdf Try equation 2 in: HIGH RESOLUTION WEATHER RADAR THROUGH PULSE COMPRESSION ams.confex.com/ams/pdfpapers/134127.pdf Try equation 3 in: Simulation and Analysis of Pulse Compression for Weather Radars ... www.radar.colostate.edu/publications/chandra/00519643.pdf If you get around to actually trying a calculation, let us know. Tell us what you have done, why and what, if any, questions remain. Dale B. Dalrymple
From: dbd on 21 May 2010 11:02
On May 21, 3:34 am, Capt. Convolution <C.Convolut...(a)aol.com> wrote: > On Thu, 20 May 2010 17:23:58 -0700 (PDT), dbd <d...(a)ieee.org> wrote: > > ,,, > >Have you tried > >intrgrated sidelobe level > >on Google? > > Only in the most cursory way. > > ... I can't understand what > kind of thinking would cause three authors agree to say "a filter is a > signal". What a strange, odd, thing to say! Many people will label the output of a process by the name of the process performed. > > >Try equation 2 in: > >HIGH RESOLUTION WEATHER RADAR THROUGH PULSE COMPRESSION > >ams.confex.com/ams/pdfpapers/134127.pdf > > The above PDF file is almost identical to the paper provided by Mr. > Zhi.Shen (http://ams.confex.com/ams/pdfpapers/123417.pdf). > The above "134127.pdf" equation 2 is identical, in every way, to the > equation 2 in the "123417.pdf" file. (The two papers were written by > the same people and their textual descriptions of their two equation > 2's are word-for-word identical. You may find that preprints posted for review are more readily available on the net than the printed versions under copyright of the publisher. > ... > ... > The "00519643.pdf" paper defines "integrated sidelobe level" in a > manner very similar to the "123417.pdf" paper. However, it's not > clear to me if those similar definitions are talking about the > spectrum of a signal or the frequency response of a filter. Why would that make a difference? > (None of > the papers say anything about the impulse response of a filter.) Sidelobes don't occur in the impulse response of a system, but in the Fourier transform or discrete Fourier transform of the impulse response. Many kinds of systems have impulse responses, including filters. And filters are taught because they can usefully represent many systems. A radar transmitter could be considered as having a spectrum in response to the "transmit" impulse. > ... > >If you get around to actually trying a calculation, let us know. Tell > >us what you have done, why and what, if any, questions remain. > > I confess that I have not yet done any software modeling of > "integrated sidelobe level" when the output of a filter is decimated. > I hope to do that in the next week. If I learn something definitive, > something predictable and sensible, I will most assuredly post my > results for you and Mr. Zhi.Shen to see. Thanks again. > > Capt. Convolution. If you had tried Google in a more than cursory way you might have noticed that there are even a number of different definitions of "integrated sidelobe level". The choice between them depends on the nature of the signal you are analysing, the type of analysis you are trying to perform and what the purpose of your use of "integrated sidelobe level" will be. Until you can communicate that, no one can give more than a general answer. I suggest the effort at modeling to force you to face and make some of those choices. That could give you more specific questions. Dale B. Dalrymple |