SYSTEMS AND METHODS FOR A MULTICARRIER MODULATION SYSTEM WITH A VARIABLE MARGIN

• US 20120219047A1
• Filed: 05/09/2012
• Published: 08/30/2012
• Est. Priority Date: 04/18/2000
• Status: Abandoned Application

• Current Assignee: TQ Delta LLC (Techquity Capital Management, LLC)
• Original Assignee: Aware Incorporated (Crowley Holdings Preferred LLC)
• Inventors: TZANNES, Marcos C.
• Application Number:
  US13/467,392
• Publication Number:
  US 20120219047A1
• Time in Patent Office: Days
• US Class Current: 375/222
• CPC Class Codes: H04B 1/38 Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 27/2627 Modulators
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0046 Determination of how many bits are transmitted on different sub-channels
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling

Abstract

A multicarrier modem has a plurality of carriers over which data is transmitted. By assigning, foe example, one or more different margins to the individual carriers the data rate and impairment immunity can be increased.

Claims

1-45. -45. (canceled)

46. A method for adjusting margins in a multicarrier modem communicating over a plurality of subchannels comprising:

assigning a first margin to one or more subchannels in the modem resulting in a first data rate;

assigning a second margin to the one or more subchannels in the modem resulting in a second date rate,

wherein;

the second margin is higher than the first margin,

the second data rate is lower than the first data rate,

the assigning of the second margin is based on at least an increase in a bit error rate on the one or more subchannels, and

the increase in the bit error rate occurs after digital subscriber line service is already initiated.