US6137829A
Expired / Lapsed
US
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System and method for transmitting special marker symbols
Assignee: SUMMIT Tech SYSTEMS LP
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Filing: 1997-11-26
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Granted: 2000-10-24
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Expires: 2017-11-26
Abstract
Abstract A system and method for the transmission of additional special marker symbols in a circular signal space constellation allows the communication of additional control information without requiring any 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.
Inventors
- 👤 William L. Betts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 00:38
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/02; H04L25/06; H04L25/061; H04L25/03; H04L25/03006; H04L25/03343; H04L25/03993; H04L27/00; H04L27/32; H04L27/34; H04L27/3405; H04L27/3416; H04L27/3427; H04L27/345; H04L27/3461; H04L27/3477
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
121 words
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 2 N , wherein 2 N 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 circular signal space constellation; a receiver configured to receive said circular signal space constellation and to output a received symbol; a subtractor configured to subtract said value of 2 N 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.
Claim 2
Independent Claim
121 words
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 2 N , wherein 2 N 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 circular signal space constellation; a receiver configured to receive said circular signal space constellation and to output a received symbol; a subtractor configured to subtract said value of 2 N 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.
Claim 3
Dependent Claim
13 words
The system of claim 1, wherein said transmitter uses carrierless amplitude/phase (CAP) modulation.
Claim 4
Dependent Claim
14 words
The system of claim 1, wherein said transmitter uses uncoded quadrature amplitude modulation (QAM).
Claim 5
Independent Claim
70 words
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 circular signal space constellation; and an adder configured to add said additional symbol to a value of 2 N , wherein 2 N represents the number of points in a signal space constellation having N bits.
Claim 6
Independent Claim
70 words
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 circular signal space constellation; and an adder configured to add said additional symbol to a value of 2 N , wherein 2 N represents the number of points in a signal space constellation having N bits.
Claim 7
Dependent Claim
16 words
The system of claim 4, wherein said additional symbol is sent using carrierless amplitude/phase (CAP) modulation.
Claim 8
Dependent Claim
17 words
The system of claim 4, wherein said additional symbol is sent using uncoded quadrature amplitude modulation (QAM).
Claim 9
Independent Claim
72 words
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 circular signal space constellation; and a subtractor configured to subtract a value of 2 N , wherein 2 N represents the number of points in a signal space constellation having N bits from said circular signal space constellation.
Claim 10
Independent Claim
72 words
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 circular signal space constellation; and a subtractor configured to subtract a value of 2 N , wherein 2 N represents the number of points in a signal space constellation having N bits from said circular signal space constellation.
Claim 11
Independent Claim
93 words
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 2 N wherein 2 N represents the number of points in a signal space constellation having N bits; transmitting the result of said adding step in a circular signal space constellation; receiving a symbol from said circular signal space constellation; subtracting said value of 2 N from said received symbol to output an additional symbol; and decoding said additional symbol into said additional special marker.
Claim 12
Independent Claim
93 words
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 2 N wherein 2 N represents the number of points in a signal space constellation having N bits; transmitting the result of said adding step in a circular signal space constellation; receiving a symbol from said circular signal space constellation; subtracting said value of 2 N from said received symbol to output an additional symbol; and decoding said additional symbol into said additional special marker.
Claim 13
Dependent Claim
15 words
The method of claim 8, wherein said step of transmitting uses carrierless amplitude/phase (CAP) modulation.
Claim 14
Dependent Claim
16 words
The method of claim 8, wherein said step of transmitting uses uncoded quadrature amplitude modulation (QAM).
Claim 15
Independent Claim
65 words
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 circular signal space constellation; and adding said additional symbol to a value of 2 N , wherein 2 N represents the number of points in a signal space constellation having N bits.
Claim 16
Independent Claim
65 words
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 circular signal space constellation; and adding said additional symbol to a value of 2 N , wherein 2 N represents the number of points in a signal space constellation having N bits.
Claim 17
Dependent Claim
22 words
The method of claim 11, further comprising the step of sending the result of said adding step using carrierless amplitude/phase (CAP) modulation.
Claim 18
Dependent Claim
23 words
The method of claim 11, further comprising the step of sending the result of said adding step using uncoded quadrature amplitude modulation (QAM).
Claim 19
Independent Claim
76 words
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 circular signal space constellation; and subtracting a value of 2 N , wherein 2 N represents the number of points in a signal space constellation having N bits, from said additional symbol prior to decoding said additional symbol into said special marker symbol.
Claim 20
Independent Claim
76 words
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 circular signal space constellation; and subtracting a value of 2 N , wherein 2 N represents the number of points in a signal space constellation having N bits, from said additional symbol prior to decoding said additional symbol into said special marker symbol.
Claim 21
Dependent Claim
104 words
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 2 N , wherein 2 N represents the number of points in a signal space constellation having N bits; transmitting the result of said adding step in a circular signal space constellation; receiving a symbol from said circular signal space constellation; subtracting said value of 2 N from said received symbol to output an additional symbol; and decoding said additional symbol into said additional special marker.
Claim 22
Dependent Claim
104 words
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 2 N , wherein 2 N represents the number of points in a signal space constellation having N bits; transmitting the result of said adding step in a circular signal space constellation; receiving a symbol from said circular signal space constellation; subtracting said value of 2 N from said received symbol to output an additional symbol; and decoding said additional symbol into said additional special marker.
Claim 23
Dependent Claim
15 words
The program of claim 15, wherein said step of transmitting uses carrierless amplitude/phase (CAP) modulation.
Claim 24
Dependent Claim
16 words
The program of claim 15, wherein said step of transmitting uses uncoded quadrature amplitude modulation (QAM).
Claim 25
Dependent Claim
75 words
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 circular signal space constellation; and adding said additional symbol to a value of 2 N , wherein 2 N represents the number of points in a signal space constellation having N bits.
Claim 26
Dependent Claim
75 words
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 circular signal space constellation; and adding said additional symbol to a value of 2 N , wherein 2 N represents the number of points in a signal space constellation having N bits.
Claim 27
Dependent Claim
22 words
The program of claim 18, further comprising the step of sending the result of said adding step using carrierless amplitude/phase (CAP) modulation.
Claim 28
Dependent Claim
23 words
The program of claim 18, further comprising the step of sending the result of said adding step using uncoded quadrature amplitude modulation (QAM).
Claim 29
Dependent Claim
69 words
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 circular signal space constellation; and subtracting a value of 2 N from said additional symbol prior to decoding said additional symbol into said special marker symbol.
Claim 30
Dependent Claim
69 words
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 circular signal space constellation; and subtracting a value of 2 N from said additional symbol prior to decoding said additional symbol into said special marker symbol.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2003-10-24 | 2004-04-24 | 2004-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-10-24 | 2008-04-24 | 2008-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-10-24 | 2012-04-24 | 2012-10-24 | $7700.00 | Window Closed / Lapsed |