Signal modulating device, signal transmitting method, and code generating method
AssigneeElectronics and Telecommunications Research Institute
InventorsByung-Jae KWAK, Dong Seung Kwon
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Abstract
The present invention relates to a signal modulation device, a transmission method, and a code generation method. The signal modulation device includes a code storage unit including a plurality of n-bit members and storing a code with a number n or n−1 of different bits between two neighboring members, and a mapper for mapping data on symbols according to the code.
Claims13
A signal modulation device comprising:
- a code storage unit comprising a plurality of n-bit members, and storing a code having a number n or n−1 of different bits between two neighboring members;
- and
- a mapper for mapping data on symbols according to the code.
A method for transmitting a signal of a communication system, comprising:
- arranging a code comprising a plurality of n-bit members on a constellation, a number of different bits between two neighboring members being n or n−1;
- modulating data by mapping the data on symbols of the constellation;
- and
- transmitting the modulated data.
A method for generating a code used for a transmitting device in a communication system to modulate transmission data, comprising:
- generating a code in a i-th stage;
- repeatedly generating a code in the i-th stage while increasing i from 2 to n;
- and
- generating the code in a n-th stage, wherein
- the generating the code in the i-th stage comprises:
- generating a code in the (i−1)-th stage comprising 2i-1 members that are arranged in one direction;
- generating a mirror image of the code in the (i−1)-th stage;
- arranging the code in the (i−1)-th stage and the mirror image of the code in the (i−1)-th stage in the one direction;
- alternately inserting 0 and 1 at a predetermined position of the respective members of the code in the (i−1)-th stage and mirror image of the code in the (i−1)-th stage that are arranged in the one direction;
- and
- generating the code in i-th stage by bit flipping either the members corresponding to the code in the (i−1)-th stage or the members corresponding to the mirror image of the code in the (i−1)-th stage into which 0 and 1 are inserted.
Dependencies are inferred from the claim text.