Partition based distribution matcher for probabilistic constellation shaping
US10069519B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 2018 |
| Grant date | Sep 4, 2018 |
| Priority date | — |
| Expiry date | Jan 23, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/251
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A communication system includes a data source to receive a block of bits, a memory to store a set of distribution matchers. Each distribution matcher is associated with a probability mass function (PMF) to match equally likely input bits to a fixed number of output bits with values distributed according to the PMF of the distribution matcher. Each distribution matcher is associated with a selection probability, such that a sum of joint probabilities of all distribution matchers equals a target PMF. A joint probability of a distribution matcher is a product of PMF of the distribution matcher with the selection probability of the distribution matcher. The communication system also includes a shaping mapper to select the distribution matcher from the set of distribution matchers with the selection probability and to map the block of bits to a block of shaped bits with a non-uniform distribution using the selected distribution matcher and a transmitter front end to transmit the block of shaped bits over a communication channel, such that bits in a sequence of the blocks of shaped bits are distributed according to the target PMF.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.