公开(公告)号：US5774500A

公开(公告)日：1998-06-30

申请号：US569759

申请日：1995-12-08

申请人： T. Nicholas Zogakis ,  John M. Cioffi

发明人： T. Nicholas Zogakis ,  John M. Cioffi

IPC分类号： H03M13/25 ,  H03M13/35 ,  H04L1/00 ,  H04L27/26 ,  H04L27/34

CPC分类号： H04L1/0057 ,  H03M13/25 ,  H03M13/256 ,  H03M13/35 ,  H03M13/3961 ,  H04L1/006 ,  H04L1/0071 ,  H04L27/2602

摘要： A trellis shaper for multi-channel modulation is provided as a means for obtaining significant shaping gain in applications requiring high-performance transceivers. The trellis shaper works across the subchannels in the multi-channel system and accommodates both the variable amounts of power and the different constellation sizes associated with the various tones. This invention offers significant advantage over the more straightforward approach of shaping each subchannel independently in terms of a reduction in delay, a reduction in memory requirements, and a reduction in complexity.

摘要翻译： 提供用于多信道调制的网格整形器作为在需要高性能收发器的应用中获得显着成形增益的手段。 网格整形器跨多通道系统中的子通道工作，并且适应可变量的功率和与各种音调相关联的不同星座尺寸。 与减少延迟，减少存储器需求以及降低复杂度方面相比，本发明提供了独立地对每个子通道进行整形的更直接的方法的显着优点。