Patent Number: 6,310,909

Title: DSL rate adaptation

Abstract: A method for enhancing the bit rate and/or margin at which quadrature amplitude modulation (QAM) communication is performed includes the steps of varying a spectral allocation and constellation size with which communication is performed, so as to define a combination of spectral allocation and constellation size at which the bit rate and/or margin are enhanced. The spectral allocation can be varied by varying a stop frequency thereof, while maintaining a substantially constant start frequency, so as to mitigate undesirable high frequency content of the bandwidth. Alternatively, both start and stop frequencies may be varied.

Inventors: Jones; David (Louisville, CO)

Assignee: Broadcom Corporation

International Classification: H04L 5/14 (20060101); H04L 27/26 (20060101); H04L 5/02 (20060101); H04B 001/38 ()

Expiration Date: 10/30/2018