System and method for transmitting special marker symbol
AssigneeParadyne Corporation
InventorWilliam L. Betts
Life of this patent
Estimating the term…
Abstract
A system and method for the transmission of additional special marker symbols in a signal space constellation allows the communication of additional control information with minimal additional power to transmit the additional symbol. Additional symbols can include “Start of Message”, “End of File”, “End of Transmission”, “Increase Data Rate”, “Decrease Data Rate”, “Save State” or “Clear”, or any additional command signal desired to be transmitted.
Claims27
A system for communication in a modem, comprising:
- a marker encoder configured to encode an additional special marker into an additional symbol;
- an adder configured to add said additional symbol to a value of 2N, wherein 2N represents the number of points in a signal space constellation having N bits;
- a transmitter configured to transmit the output of said adder in a signal space constellation;
- a receiver configured to receive said signal space constellation and to output a received symbol;
- a subtractor configured to subtract said value of 2N from said received symbol and to output a received additional symbol;
- and
- a marker decoder configured to decode said additional symbol into said additional special marker.
A system for sending an additional symbol in a modem, comprising:
- a marker encoder for encoding a special marker symbol into an additional symbol, said additional symbol occurring as an additional symbol in a signal space constellation;
- and
- an adder configured to add said additional symbol to a value of 2N, wherein 2N represents the number of points in a signal space constellation having N bits.
A system for receiving an additional symbol in a modem, comprising:
- a marker decoder for decoding an additional symbol into a special marker symbol, said additional symbol occurring as an additional symbol in a signal space constellation;
- and
- a subtractor configured to subtract a value of 2N from said signal space constellation, wherein 2N represents the number of points in a signal space constellation having N bits.
A method for communication in a modem, comprising the steps of:
- encoding an additional special marker into an additional symbol;
- adding said additional symbol to a value of 2N, wherein 2N represents the number of points in a signal space constellation having N bits;
- transmitting the result of said adding step in a signal space constellation;
- receiving a symbol from said signal space constellation;
- subtracting said value of 2N from said received symbol to output an additional symbol;
- and
- decoding said additional symbol into said additional special marker.
A method for sending an additional symbol in a modem, comprising the steps of:
- encoding a special marker symbol into an additional symbol, said additional symbol occurring as an additional symbol in a signal space constellation;
- and
- adding said additional symbol to a value of 2N, wherein 2N represents the number of points in a signal space constellation having N bits.
A method for receiving an additional symbol in a modem, comprising the steps of:
- decoding an additional symbol into a special marker symbol, said additional symbol occurring as an additional symbol in a signal space constellation;
- and
- subtracting a value of 2N from said additional symbol prior to decoding said additional symbol into said special marker symbol, wherein 2N represents the number of points in a signal space constellation having N bits.
A computer readable medium having a program for communication in a modem, the program comprising logic for executing the steps of:
- encoding an additional special marker into an additional symbol;
- adding said additional symbol to a value of 2N, wherein 2N represents the number of points in a signal space constellation having N bits;
- transmitting the result of said adding step in a signal space constellation;
- receiving a symbol from said signal space constellation;
- subtracting said value of 2N from said received symbol to output an additional symbol, wherein 2N represents the number of points in a signal space constellation having N bits;
- and
- decoding said additional symbol into said additional special marker.
A computer readable medium having a program for sending an additional symbol in a modem, the program comprising logic for executing the steps of:
- encoding a special marker symbol into an additional symbol, said additional symbol occurring as an additional symbol in a signal space constellation;
- and
- adding said additional symbol to a value of 2N, wherein 2N represents the number of points in a signal space constellation having N bits.
A computer readable medium having a program for receiving an additional symbol in a modem, the program comprising logic for executing the steps of:
- decoding an additional symbol into a special marker symbol, said additional symbol occurring as an additional symbol in a signal space constellation;
- and
- subtracting a value of 2N from said additional symbol prior to decoding said additional symbol into said special marker symbol, wherein 2N represents the number of points in a signal space constellation having N bits.
Dependencies are inferred from the claim text.