Comments on: Negative Frequency http://www.dsplog.com/2008/08/08/negative-frequency/ Signal Processing for Communication Fri, 30 Jul 2010 01:36:27 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Krishna Sankar http://www.dsplog.com/2008/08/08/negative-frequency/#comment-24874 Krishna Sankar Sun, 04 Apr 2010 23:25:50 +0000 http://www.dsplog.com/?p=210#comment-24874 @SHOAIB REHMAN SOOMRO: If the information on +ve and -ve frequency are different, we need to send the whole chunk of spectrum. If you recall, there were single side band techniques where one half of the spectra was shaved off (as the information in the -ve half was redundant) @SHOAIB REHMAN SOOMRO: If the information on +ve and -ve frequency are different, we need to send the whole chunk of spectrum. If you recall, there were single side band techniques where one half of the spectra was shaved off (as the information in the -ve half was redundant)

]]> By: SHOAIB REHMAN SOOMRO http://www.dsplog.com/2008/08/08/negative-frequency/#comment-24835 SHOAIB REHMAN SOOMRO Sun, 04 Apr 2010 18:48:46 +0000 http://www.dsplog.com/?p=210#comment-24835 Is there any effect of -ve frequecy on Bandwidh ? if yes then why ? if no then why ? Is there any effect of -ve frequecy on Bandwidh ?
if yes then why ?
if no then why ?

]]> By: Krishna Sankar http://www.dsplog.com/2008/08/08/negative-frequency/#comment-24719 Krishna Sankar Sat, 03 Apr 2010 23:49:07 +0000 http://www.dsplog.com/?p=210#comment-24719 @vivek: The power of the spectrum at +ve and -ve need not necessarily be the same @vivek: The power of the spectrum at +ve and -ve need not necessarily be the same

]]> By: Krishna Sankar http://www.dsplog.com/2008/08/08/negative-frequency/#comment-24219 Krishna Sankar Sun, 28 Mar 2010 08:45:37 +0000 http://www.dsplog.com/?p=210#comment-24219 @Subzero: Sorry, I did not understand your comment well enough to give a meaningful reply. @Subzero: Sorry, I did not understand your comment well enough to give a meaningful reply.

]]> By: Subzero http://www.dsplog.com/2008/08/08/negative-frequency/#comment-23945 Subzero Thu, 25 Mar 2010 07:39:30 +0000 http://www.dsplog.com/?p=210#comment-23945 Dear Krishna, How do you justify the beating affect when you multiply two waves together, sums and differences of the two frequencies will be generated. In Amplitude modulation, the negative freq. doesn't jump into the positive freq axis to become Lower Side Band. It is the difference frequency components from the beating affect that causes it. The negative frequency component doesn't exist in physical sense. BUT, if I try to explain the modulation process with the help of convolution, the negative part does play the role to become one of the sidebands. I AM CONFUSED!!! please help! Dear Krishna,

How do you justify the beating affect when you multiply two waves together, sums and differences of the two frequencies will be generated.

In Amplitude modulation, the negative freq. doesn’t jump into the positive freq axis to become Lower Side Band. It is the difference frequency components from the beating affect that causes it. The negative frequency component doesn’t exist in physical sense.

BUT, if I try to explain the modulation process with the help of convolution, the negative part does play the role to become one of the sidebands. I AM CONFUSED!!!

please help!

]]> By: vivek http://www.dsplog.com/2008/08/08/negative-frequency/#comment-18629 vivek Thu, 28 Jan 2010 12:30:17 +0000 http://www.dsplog.com/?p=210#comment-18629 if i say that spectrum is between -f and f,then does it mean that power in the spectrum will be distributed equally on both sides? if i say that spectrum is between -f and f,then does it mean that power in the spectrum will be distributed equally on both sides?

]]> By: Krishna Sankar http://www.dsplog.com/2008/08/08/negative-frequency/#comment-13269 Krishna Sankar Thu, 01 Oct 2009 00:23:23 +0000 http://www.dsplog.com/?p=210#comment-13269 @Kokulan: The negative frequencies helps us to understand, for example, IQ modulation. @Kokulan: The negative frequencies helps us to understand, for example, IQ modulation.

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