Conley Rose, P.C.
Trellis shaping on LDPC-coded modulation DMT systems
A transmitter in a Digital Subscriber Line (DSL) system includes a rate encoder configured to generate a first set of encoded bits using a set of least significant bits, a trellis shaper configured to generate a second set of encoded bits using a most significant bit and the first set of encoded bits, a first constellation mapper configured to generate a first point described by integer coordinates in a complex plane based on the first set of encoded bits obtained from the rate encoder, a second constellation mapper configured to generate a second point described by integer coordinates in the complex plane after interleaving two bits from the second set of encoded bits obtained from the trellis shaper, and a merger module configured to merge the first point with the second point to generate a symbol. The symbol represents a third point described by integer coordinates in the complex plane.
Futurewei Technologies, Inc.
H H H H H H H H H H
H04L H03M H04L H04L H04B H04L H04L H03M H04L H03M
inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional
Amir H. Kofi Ruosi Bin Jianhua
Fazlollahi Anim-Appiah Liu Zhou Liu