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- Xref: sparky sci.math:14882 sci.math.symbolic:2961
- Path: sparky!uunet!dziuxsolim.rutgers.edu!gandalf.rutgers.edu!amarmahb
- From: amarmahb@gandalf.rutgers.edu (Amar Mahboob Ali)
- Newsgroups: sci.math,sci.math.symbolic
- Subject: Re: Help wanted in integration.
- Message-ID: <Nov.12.22.01.54.1992.14032@gandalf.rutgers.edu>
- Date: 13 Nov 92 03:01:55 GMT
- References: <Nov.6.00.08.18.1992.2647@gandalf.rutgers.edu> <1992Nov10.031024.4001@wri.com> <1992Nov11.164014.10075@vax.oxford.ac.uk>
- Followup-To: sci.math
- Organization: Rutgers Univ., New Brunswick, N.J.
- Lines: 50
-
-
- Hi
-
- First of all I would like to thank everone who tried to solve this
- problem for me. And my special thanks go out to Victor Adamchik, John
- Cordes and Jeffrey Golden, who actually got the results. Thanks a lot
- fellows.
-
- And for how this integral arose.
-
- nagrwb@vax.oxford.ac.uk writes:
-
- >In article <1992Nov10.031024.4001@wri.com>, victor@tuamotu.wri.com (Victor Adamchik) writes:
- >> In article <Nov.6.00.08.18.1992.2647@gandalf.rutgers.edu>
- >> amarmahb@gandalf.rutgers.edu (Amar Mahboob Ali) writes:
- >>>
- >>> Hi
- >>>
- >>> Can anyone please help me in integrating the following.
- >>>
- >>> infinity
- >>>
- >>> / 4 2 2
- >>> | x sin (Pi a x) sin (Pi b x)
- >>> | ---------------------------- dx
- >>> | 2 2 2 2 2 2
- >>> / (x - d ) (x - c )
- >>>
- >>> -infinity
- >>>
- >>>
- >>> Where a,b,c and d are positive intergers.
- >>>... stuff deleted
-
- >Been trying to reach the original poster without success. Does he or
- >anyone else for that matter know under what circumstances this integral
- >arises? Is there a real underlying application? I'd be interested to know.
-
- >Richard.
-
- This integral arose as result of multiplying the power spectral
- densities of two signals. I was trying to calculate the interference
- generated by a narrow band TDMA signal in a wide band spread spectrum
- CDMA system. It is quite a real world applicaition.
-
- Please feel free to email me if you want more details.
-
- Regards
-
- Amar
-