issue

[krishnaanand1896]

Sir can i get any idea or material related to the design approach used here

[JvanKatwijk]

Well, it is actually a quite simple program There is no separate design document, but it is straight forward The devices deliver samples with a rate of 2112000, this number is chosen because it is an integer multiple of 192000. Of course, some filtering is applied. After the decimation - the samplerate and signal width are then reduced to 192000 - FM decoding is applied Since the FM signal is the sine of an integral, decoding is basically differentiating. There are several algorithms implemented for this decoding step, just to see what works best Look on the internet to an MSC thesis, titled Implementation of FM Demodulator Algorithms on a High Performance Digital Signal Processor for a description of the algorithms applied The next step is of course separating the demodulated signal into its components around IF 0, there is the L+R signal, at 19 KHz, there is the pilot, at 38 KHz there is the L-R signal, at 57 KHz there is the rds signal Processing the L-R and rds signal requires the insertion of a clean pilot signal, so the pilot signal is first restored and then mixed with the 38 and 49 KHz signals. Separation of the signals is by string filtering Of course, sound is then easy: add L+R and L-R and you get the left channel, subtract L+R and L-R and you get the right channel Decoding the RDS is in a number of steps, you can best look for a document on the web called CuteSDR Technical Manual that contains a reasonable detailed desccription of an FM decoder hope this helps best jan Op wo 12 jan. 2022 om 05:48 schreef krishnaanand1896 < ***@***.***>:

…

Sir can i get any idea or material related to the design approach used here — Reply to this email directly, view it on GitHub <#5>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACCPHQE6FZIKI3A54U4YSDLUVUBYZANCNFSM5LYAB2XA> . Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

-- Jan van Katwijk

[krishnaanand1896]

Thank you so much sir

…

On Wed, 12 Jan 2022, 13:55 JvanKatwijk, ***@***.***> wrote: Well, it is actually a quite simple program There is no separate design document, but it is straight forward The devices deliver samples with a rate of 2112000, this number is chosen because it is an integer multiple of 192000. Of course, some filtering is applied. After the decimation - the samplerate and signal width are then reduced to 192000 - FM decoding is applied Since the FM signal is the sine of an integral, decoding is basically differentiating. There are several algorithms implemented for this decoding step, just to see what works best Look on the internet to an MSC thesis, titled Implementation of FM Demodulator Algorithms on a High Performance Digital Signal Processor for a description of the algorithms applied The next step is of course separating the demodulated signal into its components around IF 0, there is the L+R signal, at 19 KHz, there is the pilot, at 38 KHz there is the L-R signal, at 57 KHz there is the rds signal Processing the L-R and rds signal requires the insertion of a clean pilot signal, so the pilot signal is first restored and then mixed with the 38 and 49 KHz signals. Separation of the signals is by string filtering Of course, sound is then easy: add L+R and L-R and you get the left channel, subtract L+R and L-R and you get the right channel Decoding the RDS is in a number of steps, you can best look for a document on the web called CuteSDR Technical Manual that contains a reasonable detailed desccription of an FM decoder hope this helps best jan Op wo 12 jan. 2022 om 05:48 schreef krishnaanand1896 < ***@***.***>: > Sir can i get any idea or material related to the design approach used here > > — > Reply to this email directly, view it on GitHub > <#5>, or unsubscribe > < https://github.com/notifications/unsubscribe-auth/ACCPHQE6FZIKI3A54U4YSDLUVUBYZANCNFSM5LYAB2XA > > . > Triage notifications on the go with GitHub Mobile for iOS > < https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675 > > or Android > < https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub >. > > You are receiving this because you are subscribed to this thread.Message > ID: ***@***.***> > -- Jan van Katwijk — Reply to this email directly, view it on GitHub <#5 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AWIRBNDG7OKFOPRHDSU4ZC3UVU3HPANCNFSM5LYAB2XA> . Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>. You are receiving this because you authored the thread.Message ID: ***@***.***>

[krishnaanand1896]

Sir is it possible to get the c code for this

[JvanKatwijk]

all sources are in the repository, you can just download the sourcetree Op ma 23 mei 2022 om 06:21 schreef krishnaanand1896 < ***@***.***>:

…

Sir is it possible to get the c code for this — Reply to this email directly, view it on GitHub <#5 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACCPHQGZOK4BR4P5TUAJA6LVLMBVBANCNFSM5LYAB2XA> . You are receiving this because you commented.Message ID: ***@***.***>

-- Jan van Katwijk