abs/2020PASA...37...34M/abstract
>>
>>
>>
>> Good luck on your PUPPI inversion quest!
>>
>>
>>
>> Cheers,
>>
>> Danny
>>
>>
>>
>> *From: *Hsin Cynthia Chiang, Prof
>> *Date: *Friday, 4 February 2022 at 10:34
ice
> *Sent:* Friday, February 4, 2022 10:02 AM
> *To:* casper@lists.berkeley.edu ; Nikhil
> Mahajan ; Jonathan Le Roy Sievers, Prof <
> jonathan.siev...@mcgill.ca>
> *Subject:* Re: [casper] Inverting the Polyphase Filter Bank
>
>
> Hi Nikhil,
>
>
>
> To
> So … imperfect reconstruction should work just fine.
>
>
>
> If you want to Google the terminology, a PFB is an analysis filter bank, and
> the inverse is a synthesis filter bank.
>
>
>
> Regards,
>
> Dave
>
>
>
> From: Jack Hickish mailto:j
ant to Google the terminology, a PFB is an analysis filter bank, and
the inverse is a synthesis filter bank.
Regards,
Dave
From: Jack Hickish mailto:jackhick...@gmail.com>>
Sent: Friday, February 4, 2022 7:10 AM
To: casper mailto:casper@lists.berkeley.edu>>
Subject: [EXTERNAL]
e ADC.
>
>
>
> So … imperfect reconstruction should work just fine.
>
>
>
> If you want to Google the terminology, a PFB is an analysis filter bank,
> and the inverse is a synthesis filter bank.
>
>
>
> Regards,
>
> Dave
>
>
>
> *From:* Jack
construction should work just fine.
If you want to Google the terminology, a PFB is an analysis filter bank, and
the inverse is a synthesis filter bank.
Regards,
Dave
From: Jack Hickish
Sent: Friday, February 4, 2022 7:10 AM
To: casper
Subject: [EXTERNAL] Re: [casper] Inverting the Polyphase
On Fri, Feb 4, 2022 at 10:10 AM Jack Hickish wrote:
>
>
> On Fri, 4 Feb 2022 at 15:04, Nikhil Mahajan
> wrote:
>
>> Hi Morag and Jack,
>>
>> Thank you for the prompt response. It was great to learn about the
>> Hermitian trick to combine 2 real FFTs - that's very interesting.
>>
>> So, unless I
On Fri, 4 Feb 2022 at 15:04, Nikhil Mahajan
wrote:
> Hi Morag and Jack,
>
> Thank you for the prompt response. It was great to learn about the
> Hermitian trick to combine 2 real FFTs - that's very interesting.
>
> So, unless I am wrong, perfect reconstruction / inversion is not possible
>
Hi Morag and Jack,
Thank you for the prompt response. It was great to learn about the
Hermitian trick to combine 2 real FFTs - that's very interesting.
So, unless I am wrong, perfect reconstruction / inversion is not possible
because the information in the Nyquist bin is thrown away? (I hope I
On Fri, 4 Feb 2022 at 10:41, Jack Hickish wrote:
>
>
> On Fri, 4 Feb 2022 at 07:08, Morag Brown wrote:
>
>> Hey Nikhail,
>>
>> The FFT is a Hermitian function, which means that it has the property:
>>
>> [image: Screenshot from 2022-02-04 08-34-24.png]
>>
>> This principle is used in the real
On Fri, 4 Feb 2022 at 07:08, Morag Brown wrote:
> Hey Nikhail,
>
> The FFT is a Hermitian function, which means that it has the property:
>
> [image: Screenshot from 2022-02-04 08-34-24.png]
>
> This principle is used in the real wideband FFT to compute 2 real FFTs
> using one complex FFT core -
Nikhil*, sorry!
On Fri, Feb 4, 2022 at 9:08 AM Morag Brown wrote:
> Hey Nikhail,
>
> The FFT is a Hermitian function, which means that it has the property:
>
> [image: Screenshot from 2022-02-04 08-34-24.png]
>
> This principle is used in the real wideband FFT to compute 2 real FFTs
> using one
Hey Nikhail,
The FFT is a Hermitian function, which means that it has the property:
[image: Screenshot from 2022-02-04 08-34-24.png]
This principle is used in the real wideband FFT to compute 2 real FFTs
using one complex FFT core - this
Dear CASPERites,
I am a graduate student at the University of Toronto (working with Marten
van Kerkwijk) and I have some raw baseband data collected using PUPPI
(Arecibo) - and I am on a quest to invert the polyphase filter bank. I have
32 channels of complex-baseband that I would very much like
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