Patent ID: 7180955
Filing Date: 2007-02-20
Classification: H03M,H04L

Abstract:
1. A communication transmission apparatus, comprising: a first input for receiving coded bits; a second input for receiving an interleaved version of said coded bits; a first mapper coupled to said first input for applying a first coded bits-to-signal mapping to said coded bits to produce a first output signal, wherein said first coded bits-to-signal mapping is one of Gray mapping, 0231 mapping and 0213 mapping; a second mapper coupled to said second input for applying a second coded bits-to-signal mapping to the interleaved version of said coded bits to produce a second output signal, wherein said second coded bits-to-signal mapping differs from said first coded bits-to-signal mapping; and a communication channel interface coupled to said mappers for interfacing said output signals to a communication channel.