公开(公告)号：US20040039983A1

公开(公告)日：2004-02-26

申请号：US10386123

申请日：2003-03-10

Applicant: STMicroelectronics S.A.

Inventor： Jean-Marc Brossier ,  Frederic Lehmann

IPC: H03M013/00

CPC classification number: H04L1/0042 ,  H04L1/0003 ,  H04L1/0071

Abstract: A modulation process for a digital transmission system having an error correcting code and determination of the number of bits to load on a transmission channel. The process judiciously associates a coder for introducing redundancy to the binary information, an interleaver for suppression the correlation to the encoded information and a labeling of the same based on a GRAY type coding in order to associate the said binary information with points of a constellation which is selected among a predetermined set of constellations. The process achieves a precise determination of the order and size of the constellation to utilize and, therefore, the computation of the bit loading as a function of the signal to noise ratio measured in reception and as a function of the bit error rate Pbit at the output of the receiver. The process is well adapted to the Multi Tone transmission system, and to the use of turbo codes.

Abstract translation: 一种用于具有纠错码和在传输信道上加载的比特数的确定的数字传输系统的调制过程。 该过程明确地将用于将冗余引入二进制信息的编码器，用于抑制与编码信息的相关性的交织器和基于灰度类型编码的标记，以便将所述二进制信息与星座的点相关联， 被选择在一组预定的星座中。 该过程实现了使用的星座的顺序和尺寸的精确确定，并且因此实现了在接收时测量的作为信噪比的函数的比特加载的计算，并且作为在接收时的比特误码率Pbit的函数 接收机的输出。 该过程很好地适应于多音调传输系统以及使用turbo码。