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Re: DSP question (software modem)

From "Rod Pemberton" <do_not_have@notemailntt.cmm>
Newsgroups comp.lang.forth
Subject Re: DSP question (software modem)
Date 2012-06-08 02:36 -0400
Organization Aioe.org NNTP Server
Message-ID <jqs6g2$ahf$1@speranza.aioe.org> (permalink)
References <85acf1b9-9524-4814-8692-b88662dabe03@ki5g2000pbb.googlegroups.com><jqh172$7hn$1@speranza.aioe.org><ca499d7a-c196-438f-aa30-069f0b049f2f@ra8g2000pbc.googlegroups.com><StSdnc7tfoLjpFHSnZ2dnUVZ_okAAAAA@supernews.com><7x4nqrodlk.fsf_-_@ruckus.brouhaha.com><GYidnThRG4kkHVHSnZ2dnUVZ_r6dnZ2d@supernews.com><7xehpvqt6n.fsf@ruckus.brouhaha.com><t--dnQcLHf2CD1HSnZ2dnUVZ_sqdnZ2d@supernews.com><7xaa0iriot.fsf@ruckus.brouhaha.com><cJ-dnfeax9c5j1DSnZ2dnUVZ_qGdnZ2d@supernews.com><7x1ulug6mn.fsf@ruckus.brouhaha.com><09ednWWnQP70HU3SnZ2dnUVZ_u2dnZ2d@supernews.com><7xy5nzukcc.fsf@ruckus.brouhaha.com><AL-dnbeJhNrwtEzSnZ2dnUVZ_qOdnZ2d@supernews.com> <7x7gvi1nlt.fsf@ruckus.brouhaha.com>

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"Paul Rubin" <no.email@nospam.invalid> wrote in message
news:7x7gvi1nlt.fsf@ruckus.brouhaha.com...
>
> Thanks--though I was asking more about modulation methods for sending
> bits over an analog channel.  That Wikipedia article is good, but mostly
> about dealing with the channel as already digital.
>

Are you asking for something to read?  ...

(It's really quite amazing as to how much information
these Wikipedia pages capture.)

The modem page lists the protocols that have been used in modems from early
to modern, for telephone to broadband to mobile.  PSK and QAM variations are
most commonly used.

Analog modulation:
http://en.wikipedia.org/wiki/Amplitude_modulation
http://en.wikipedia.org/wiki/Frequency_modulation
http://en.wikipedia.org/wiki/Phase_modulation
http://en.wikipedia.org/wiki/Quadrature_amplitude_modulation
http://en.wikipedia.org/wiki/Space_modulation
http://en.wikipedia.org/wiki/Single-sideband_modulation

Digital modulation:
http://en.wikipedia.org/wiki/Amplitude-shift_keying
http://en.wikipedia.org/wiki/Continuous_phase_modulation
http://en.wikipedia.org/wiki/Frequency-shift_keying
http://en.wikipedia.org/wiki/Multiple_frequency-shift_keying
http://en.wikipedia.org/wiki/Minimum-shift_keying
http://en.wikipedia.org/wiki/On-off_keying
http://en.wikipedia.org/wiki/Pulse-position_modulation
http://en.wikipedia.org/wiki/Phase_shift_keying
http://en.wikipedia.org/wiki/Quadrature_amplitude_modulation
http://en.wikipedia.org/wiki/Single-carrier_FDMA
http://en.wikipedia.org/wiki/Trellis_modulation
http://en.wikipedia.org/wiki/Orthogonal_frequency-division_multiplexing

Spread Spectrum:
http://en.wikipedia.org/wiki/Chirp_spread_spectrum
http://en.wikipedia.org/wiki/Direct-sequence_spread_spectrum
http://en.wikipedia.org/wiki/Frequency-hopping_spread_spectrum
http://en.wikipedia.org/wiki/Time-hopping
http://en.wikipedia.org/wiki/Code_division_multiple_access
http://en.wikipedia.org/wiki/Time_division_multiple_access

Pulse modulation:
http://en.wikipedia.org/wiki/Pulse-position_modulation
http://en.wikipedia.org/wiki/Pulse-amplitude_modulation
http://en.wikipedia.org/wiki/Pulse-code_modulation
http://en.wikipedia.org/wiki/Pulse-width_modulation

Floppy and hard drive related:
http://en.wikipedia.org/wiki/Group_Code_Recording
http://en.wikipedia.org/wiki/Modified_Frequency_Modulation
http://en.wikipedia.org/wiki/Run-length_limited
http://en.wikipedia.org/wiki/Non-return-to-zero
http://en.wikipedia.org/wiki/Zoned_bit_recording
http://en.wikipedia.org/wiki/Constant_Angular_Velocity
http://en.wikipedia.org/wiki/Constant_linear_velocity

etc.
http://en.wikipedia.org/wiki/Logic_level
http://en.wikipedia.org/wiki/Self-clocking_signal
http://en.wikipedia.org/wiki/Error-correcting_code
http://en.wikipedia.org/wiki/Modem
http://en.wikipedia.org/wiki/Optical_disc_drive
http://en.wikipedia.org/wiki/Floppy_disk_drive
http://en.wikipedia.org/wiki/Hard_disk
http://en.wikipedia.org/wiki/Solid-state_drive
http://en.wikipedia.org/wiki/Cable_modem


Rod Pemberton

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Thread

post your solution to this problem quiet_lad <gavcomedy@gmail.com> - 2012-06-03 14:33 -0700
  Re: post your solution to this problem "Rod Pemberton" <do_not_have@notemailntt.cmm> - 2012-06-03 20:59 -0400
    Re: post your solution to this problem quiet_lad <gavcomedy@gmail.com> - 2012-06-03 19:06 -0700
      Re: post your solution to this problem "Elizabeth D. Rather" <erather@forth.com> - 2012-06-03 18:27 -1000
    Re: post your solution to this problem quiet_lad <gavcomedy@gmail.com> - 2012-06-03 19:49 -0700
      Re: post your solution to this problem "Elizabeth D. Rather" <erather@forth.com> - 2012-06-03 18:28 -1000
        DSP question (software modem) Paul Rubin <no.email@nospam.invalid> - 2012-06-03 22:22 -0700
          Re: DSP question (software modem) Mark Wills <markrobertwills@yahoo.co.uk> - 2012-06-04 02:19 -0700
            Re: DSP question (software modem) Paul Rubin <no.email@nospam.invalid> - 2012-06-04 03:07 -0700
          Re: DSP question (software modem) Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-06-04 04:32 -0500
            Re: DSP question (software modem) Paul Rubin <no.email@nospam.invalid> - 2012-06-04 03:15 -0700
              Re: DSP question (software modem) Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-06-04 05:46 -0500
                Re: DSP question (software modem) Paul Rubin <no.email@nospam.invalid> - 2012-06-04 12:16 -0700
                Re: DSP question (software modem) Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-06-04 14:55 -0500
                Re: DSP question (software modem) Paul Rubin <no.email@nospam.invalid> - 2012-06-04 13:32 -0700
                Re: DSP question (software modem) Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-06-07 05:20 -0500
                Re: DSP question (software modem) Paul Rubin <no.email@nospam.invalid> - 2012-06-07 10:01 -0700
                Re: DSP question (software modem) quiet_lad <gavcomedy@gmail.com> - 2012-06-07 11:04 -0700
                Re: DSP question (software modem) Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-06-07 17:21 -0500
                Re: DSP question (software modem) Paul Rubin <no.email@nospam.invalid> - 2012-06-07 20:36 -0700
                Re: DSP question (software modem) "Rod Pemberton" <do_not_have@notemailntt.cmm> - 2012-06-08 02:36 -0400
                Re: post your solution, and don't over write my thread, or I'll do something to Paul Rubbin quiet_lad <gavcomedy@gmail.com> - 2012-06-07 23:55 -0700
                Re: post your solution, and don't over write my thread ... BruceMcF <agila61@netscape.net> - 2012-06-08 09:56 -0700
                Re: DSP question (software modem) Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-06-08 07:52 -0500
                Re: DSP question (software modem) Paul Rubin <no.email@nospam.invalid> - 2012-06-08 11:14 -0700
                Re: DSP question (software modem) "Rod Pemberton" <do_not_have@notemailntt.cmm> - 2012-06-08 16:29 -0400
                Re: DSP question (software modem) Paul Rubin <no.email@nospam.invalid> - 2012-06-08 19:59 -0700
                Re: DSP question (software modem) Richard Owlett <rowlett@pcnetinc.com> - 2012-06-08 22:37 -0500
                Re: DSP question (software modem) Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-06-09 04:36 -0500
                Re: DSP question (software modem) Paul Rubin <no.email@nospam.invalid> - 2012-06-09 09:41 -0700
                Re: post your solution and Paul rubin is a stinker for changing it, you bugger paul!! quiet_lad <gavcomedy@gmail.com> - 2012-06-06 15:52 -0700
                Re: post your solution and Paul rubin is a stinker for changing it, you bugger paul!! BruceMcF <agila61@netscape.net> - 2012-06-06 16:09 -0700
                Re: post your solution, please no one change subject, start new thread of your own instead quiet_lad <gavcomedy@gmail.com> - 2012-06-07 11:02 -0700
                Re: post your solution, please no one change subject, start new thread of your own instead "Elizabeth D. Rather" <erather@forth.com> - 2012-06-07 08:28 -1000
                Re: post your solution, please no one change subject, start new thread of your own instead quiet_lad <gavcomedy@gmail.com> - 2012-06-07 23:58 -0700
                Re: post your solution, please no one change subject, start new thread of your own instead Paul Rubin <no.email@nospam.invalid> - 2012-06-07 11:53 -0700
                Re: post your solution, please no one change subject, start new thread of your own instead quiet_lad <gavcomedy@gmail.com> - 2012-06-07 23:54 -0700
                Re: post your solution, please no one change subject, start new thread of your own instead quiet_lad <gavcomedy@gmail.com> - 2012-06-08 00:00 -0700
                Re: post your solution, please no one change subject, start new thread of your own instead BruceMcF <agila61@netscape.net> - 2012-06-08 10:08 -0700
                [OT] About cancellation of quiet_lad's messages, was Re: post your .... of your own instead Albert van der Horst <albert@spenarnc.xs4all.nl> - 2012-06-08 11:34 +0000
                Re: post your solution, please no one change subject, start new thread of your own instead BruceMcF <agila61@netscape.net> - 2012-06-08 10:03 -0700
                Re: post your solution and Paul rubin is a stinker for changing it, you bugger paul!! "Rod Pemberton" <do_not_have@notemailntt.cmm> - 2012-06-06 19:28 -0400
                This thread is a load of s**t Mark Wills <markrobertwills@yahoo.co.uk> - 2012-06-07 00:54 -0700
                Re: post your solution and Paul rubin is a stinker for changing it, you bugger paul!! quiet_lad <gavcomedy@gmail.com> - 2012-06-07 11:03 -0700
                Re: post your solution quiet_lad <gavcomedy@gmail.com> - 2012-06-07 11:10 -0700
          Re: DSP question (software modem) Richard Owlett <rowlett@pcnetinc.com> - 2012-06-04 07:08 -0500
  Re: post your solution to this problem John Passaniti <john.passaniti@gmail.com> - 2012-06-04 09:06 -0700
    Re: post your solution to this problem quiet_lad <gavcomedy@gmail.com> - 2012-06-06 15:51 -0700
      Re: post your solution to this problem "WJ" <w_a_x_man@yahoo.com> - 2012-06-08 16:12 +0000
      Re: post your solution to this problem "WJ" <w_a_x_man@yahoo.com> - 2012-06-09 16:15 +0000
  Re: post your solution to this problem BruceMcF <agila61@netscape.net> - 2012-06-08 10:15 -0700

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