>On Thu, 28 May 2015 06:19:40 -0500, "mcubillas" <20183@DSPRelated>
>wrote:
>
> [Snipped by Lyons]
>>
>>Hi Rick,
>>
>>I still have a VHS tape player that is in very good condition. I think
I
>>purchased it in the early 2000's because I still had instructional VHS
>>tapes that I wanted to view.
>>
>>If you still have them let me know what it will cost me to have them
>>shipped to zip code 91910.
>>
>>Thanks,
>>Miguel Cubillas
>
>Hi Miguel,
> Oh shoot. I'm sorry to say that about a
>week ago I agreed to mail those tapes to
>another guy here on comp.dsp.
>
>Sorry about that Miguel.
>
>[-Rick-]
Hi Rick,
No problem!
Miguel
---------------------------------------
Posted through http://www.DSPRelated.com
Reply by Rick Lyons●May 29, 20152015-05-29
On Thu, 28 May 2015 06:19:40 -0500, "mcubillas" <20183@DSPRelated>
wrote:
[Snipped by Lyons]
>
>Hi Rick,
>
>I still have a VHS tape player that is in very good condition. I think I
>purchased it in the early 2000's because I still had instructional VHS
>tapes that I wanted to view.
>
>If you still have them let me know what it will cost me to have them
>shipped to zip code 91910.
>
>Thanks,
>Miguel Cubillas
Hi Miguel,
Oh shoot. I'm sorry to say that about a
week ago I agreed to mail those tapes to
another guy here on comp.dsp.
Sorry about that Miguel.
[-Rick-]
Reply by ●May 28, 20152015-05-28
On Wednesday, May 27, 2015 at 2:03:36 PM UTC-4, Rick Lyons wrote:
> On Tue, 19 May 2015 14:42:33 -0700 (PDT), bulegoge@columbus.rr.com
> wrote:
>
> >Rick,
> >
> >I have a question for you regarding AGC implementation based upon a diagram in your textbook. The diagram you show (Figure 13-77) shows the AGC'd signal , yn going through a multiplier. I was wondering if a complex signal is available whether it is better to implement the AGC with Isquared+Qsquared rather than with yn squared?
>
> Hello bulegoge,
> The answer to your question is:
>
> If x(n)and y(n) are complex-valued sequences,
> then yes, the input samples applied to the
> lowpass filter should be the Isquared + Qsquared
> value of the y(n) sequence.
>
> Thanks for making me think about this
> complex-signal situation!
>
> bulegoge, if you'd like to have the errata for your
> copy of my "Undersatnding DSP" book, please send me
> a private e-mail. I'll be happy to send you the
> approriate errata.
>
> [-Rick-]
Thanks for the reply. I am finally getting to implement a real DSP based radio after thinking about this stuff for several years. I have also been playing around with gnuradio, which is a great platform to understand DSP architectures.
Brent
Reply by mcubillas●May 28, 20152015-05-28
>Hi,
> In Julius' 5/18/15 reply to my post (Subject: An
>interesting historical DSP article) he mentioned the
>existence of old DSP instructional videos recorded
>on VHS tapes.
>
>As it turns out, I own the following VHS tapes:
>
> IEEE IEDM-DSP
> "Fundamentals of DSP" (Part 1 of 4)
> by a Ronald Schafer
>
> IEEE IEDM-DSP
> "Applications of DSP" (Part 2 of 4)
> by a James McClellan
>
> IEEE IEDM-DSP
> "Trends in DSP System Design" (Part 3 of 4)
> by a Ronald Schafer
>
> IEEE IEDM-DSP
> "DSP, Analog Interfaces" (Part 4 of 4)
> by a R. Hester
>
> Mass. Inst. of Tech. (MIT)
> "Z-Transform Properties"
> by a Ronald Schafer
>
> IEEE
> "High-Resolution and Higher-Order
> Spectral Analysis" (Part 1 of 2)
>
> IEEE
> "High-Resolution and Higher-Order
> Spectral Analysis" (Part 2 of 2)
>
>Because I threw my VHS player away years ago,
>I wonder if those tapes would be worth anything
>to anybody.
>
>[-Rick-]
Hi Rick,
I still have a VHS tape player that is in very good condition. I think I
purchased it in the early 2000's because I still had instructional VHS
tapes that I wanted to view.
If you still have them let me know what it will cost me to have them
shipped to zip code 91910.
Thanks,
Miguel Cubillas
---------------------------------------
Posted through http://www.DSPRelated.com
Reply by Rick Lyons●May 27, 20152015-05-27
On Tue, 19 May 2015 14:42:33 -0700 (PDT), bulegoge@columbus.rr.com
wrote:
>Rick,
>
>I have a question for you regarding AGC implementation based upon a diagram in your textbook. The diagram you show (Figure 13-77) shows the AGC'd signal , yn going through a multiplier. I was wondering if a complex signal is available whether it is better to implement the AGC with Isquared+Qsquared rather than with yn squared?
Hello bulegoge,
The answer to your question is:
If x(n)and y(n) are complex-valued sequences,
then yes, the input samples applied to the
lowpass filter should be the Isquared + Qsquared
value of the y(n) sequence.
Thanks for making me think about this
complex-signal situation!
bulegoge, if you'd like to have the errata for your
copy of my "Undersatnding DSP" book, please send me
a private e-mail. I'll be happy to send you the
approriate errata.
[-Rick-]
Reply by Rick Lyons●May 27, 20152015-05-27
On Tue, 19 May 2015 14:42:33 -0700 (PDT), bulegoge@columbus.rr.com
wrote:
[Snipped by Lyons]
>
>I have a question for you regarding AGC implementation based upon a diagram in your textbook. The diagram you show (Figure 13-77) shows the AGC'd signal , yn going through a multiplier. I was wondering if a complex signal is available whether it is better to implement the AGC with Isquared+Qsquared rather than with yn squared?
Hello bulegoge,
I just now saw your post. I don't have a
quick answer for you off the top of my head.
Let me think about your question for a while and
I'll get abck to you.
[-Rick-]
Reply by ●May 19, 20152015-05-19
On Monday, May 18, 2015 at 7:04:47 PM UTC-4, Rick Lyons wrote:
> Hi,
> In Julius' 5/18/15 reply to my post (Subject: An
> interesting historical DSP article) he mentioned the
> existence of old DSP instructional videos recorded
> on VHS tapes.
>
> As it turns out, I own the following VHS tapes:
>
> IEEE IEDM-DSP
> "Fundamentals of DSP" (Part 1 of 4)
> by a Ronald Schafer
>
> IEEE IEDM-DSP
> "Applications of DSP" (Part 2 of 4)
> by a James McClellan
>
> IEEE IEDM-DSP
> "Trends in DSP System Design" (Part 3 of 4)
> by a Ronald Schafer
>
> IEEE IEDM-DSP
> "DSP, Analog Interfaces" (Part 4 of 4)
> by a R. Hester
>
> Mass. Inst. of Tech. (MIT)
> "Z-Transform Properties"
> by a Ronald Schafer
>
> IEEE
> "High-Resolution and Higher-Order
> Spectral Analysis" (Part 1 of 2)
>
> IEEE
> "High-Resolution and Higher-Order
> Spectral Analysis" (Part 2 of 2)
>
> Because I threw my VHS player away years ago,
> I wonder if those tapes would be worth anything
> to anybody.
>
> [-Rick-]
Rick,
I have a question for you regarding AGC implementation based upon a diagram in your textbook. The diagram you show (Figure 13-77) shows the AGC'd signal , yn going through a multiplier. I was wondering if a complex signal is available whether it is better to implement the AGC with Isquared+Qsquared rather than with yn squared?
Reply by julius●May 19, 20152015-05-19
Trick question, I didn't watch Hollywood movies on VHS ;-).
Reply by Rick Lyons●May 19, 20152015-05-19
On Tue, 19 May 2015 05:54:37 -0700 (PDT), julius <juliusk@gmail.com>
wrote:
>Haha, I don't think I've owned a VHS player since .... 2000? If you have fond memories of them you should think of converting them to DVD.
>
>I met Lotfi Zadeh at Berkeley in 2000 when they had some sort of internal symposium. Knowing that he had pioneered the development of the z-transform, and having had some cheap wine (I was a grad student at the time!), I came up to him and said I enjoyed that work of his and asked if the 'z' in z-transform was for "Zadeh". That made him laugh and he said, "no no no, I'd never do such a thing! We called it 'z' because you get a 'z' when you flip 's', like in the s-transform."
>
>I was pleasantly surprised that Jim McClellan is still active in GATech, I thought he had retired some years ago. I hired one of his PhD students for an internship this summer, so I look forward to getting to know McClellan through him.
>
>OK, enough name-dropping for this morning ..... !
H Julius,
It's nice to hear from you and to hear
your stories.
Julius, I have a important question for
you. The question is very personal and
I hope it does not offend you. I also hope
your answer doesn't embarrass you or damage
your career in any way. Here's the question:
"When you rented Hollywood movie VHS tapes from
the movie rental place, did you rewind the
tapes before returning them?
[-Rick-]
Reply by julius●May 19, 20152015-05-19
Haha, I don't think I've owned a VHS player since .... 2000? If you have fond memories of them you should think of converting them to DVD.
I met Lotfi Zadeh at Berkeley in 2000 when they had some sort of internal symposium. Knowing that he had pioneered the development of the z-transform, and having had some cheap wine (I was a grad student at the time!), I came up to him and said I enjoyed that work of his and asked if the 'z' in z-transform was for "Zadeh". That made him laugh and he said, "no no no, I'd never do such a thing! We called it 'z' because you get a 'z' when you flip 's', like in the s-transform."
I was pleasantly surprised that Jim McClellan is still active in GATech, I thought he had retired some years ago. I hired one of his PhD students for an internship this summer, so I look forward to getting to know McClellan through him.
OK, enough name-dropping for this morning ..... !