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Processor modem

  • US 4,965,641 A
  • Filed: 05/17/1989
  • Issued: 10/23/1990
  • Est. Priority Date: 02/21/1989
  • Status: Expired due to Term
First Claim
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1. A method for a processor having an application program and a modem program for receiving output data words from said application program and providing passband transmit signal values, said method comprising the following steps:

  • (a) determining when said application program has an output data word;

    (b) receiving said output data word;

    (c) writing said output data byte to a word buffer;

    (d) determining when it is time to send a baseband transmit point;

    (e) reading at least one information bit from said byte buffer;

    (f) selecting a baseband transmit point based at least in part on said at least one information bit and a predetermined method for selecting a baseband transmit point based on at least one predetermined information bit;

    (g) writing said baseband transmit point to a baud buffer;

    (h) determining when it is time to send a passband transmit signal value;

    (i) reading said baseband transmit point from said baud buffer;

    (j) selecting a passband transmit signal value based at least in part on said baseband transmit point and a predetermined method for selecting a passband transmit signal value based on a predetermined baseband transmit point;

    (k) providing said passband transmit signal value.

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