Method and apparatus for mapping/demapping modulation symbols in a mobile communication system
AssigneeSamsung Electronics Co., Ltd.
InventorsJin-Kyu Han, Ju-Ho Lee, Joon-Young Cho, Hwan-Joon Kwon
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Abstract
A method for mapping wireless resources of reference symbols for channel state estimation and modulation symbols for user information transmission in a transmitter of an Orthogonal Frequency Division Multiplexing (OFDM) mobile communication system is disclosed. The mapping method includes channel-encoding and modulating a user information stream to be transmitted, and then generating a systematic symbol stream and a parity symbol stream; and preferentially arranging systematic modulation symbols in resource elements of a symbol including no reference symbol, and then arranging parity modulation symbols in remaining resource elements.
Claims7
A method for mapping reference symbols and modulation symbols in a transmitter of a mobile communication system, the method comprising:
- channel-encoding and modulating a user information stream to be transmitted;
- generating a systematic symbol stream containing systematic modulation symbols and a parity symbol stream containing parity modulation symbols using the user information stream;
- and
- preferentially and sequentially arranging a first portion of the systematic modulation symbols along a frequency domain in a symbol interval including no reference symbol;
- sequentially arranging a second portion of the systematic modulation symbols along the frequency domain in a next symbol interval including no reference symbol;
- and
- arranging the parity modulation symbols in a symbol interval including at least one reference symbol.
A method for mapping reference symbols and modulation symbols in a transmitter of a mobile communication system, the method comprising:
- channel-encoding and modulating a user information stream to be transmitted;
- generating a systematic symbol stream containing systematic modulation symbols and a parity symbol stream containing parity modulation symbols using the user information stream;
- preferentially and sequentially arranging the systematic modulation symbols along a time domain in symbol intervals including no reference symbol in one frequency tone;
- sequentially arranging the systematic modulation symbols along the time domain in the symbol intervals in a next frequency tone;
- and
- arranging the parity modulation symbols in a symbol interval including at least one reference symbol.
An apparatus for mapping modulation symbols and reference symbols in a transmitter of a mobile communication system, the apparatus comprising:
- a channel encoder configured to convert an input user bit stream into a coded bit stream;
- a demultiplexer configured to demultiplex the coded bit stream into a systematic bit stream and a parity bit stream;
- a first modulator configured to modulate the systematic bit stream;
- a second modulator configured to modulate the parity bit stream;
- a first interleaver configured to interleave systematic modulation symbols output from the first modulator;
- a second interleaver configured to interleave parity modulation symbols output from the second modulator;
- and
- a resource element mapper configured to preferentially arrange the systematic modulation symbols along a frequency domain in a symbol interval including no reference symbol, and to arrange the parity modulation symbols in a symbol interval including at least one reference symbol.
An apparatus for mapping modulation symbols and reference symbols in a transmitter of a mobile communication system, the apparatus comprising:
- a channel encoder configured to convert an input user bit stream into a coded bit stream;
- a demultiplexer configured to demultiplex the coded bit stream into a systematic bit stream and a parity bit stream;
- a first modulator configured to modulate the systematic bit stream;
- a second modulator configured to modulate the parity bit stream;
- a first interleaver configured to interleave systematic modulation symbols output from the first modulator;
- a second interleaver configured to interleave parity modulation symbols output from the second modulator;
- and
- a resource element mapper configured to preferentially and sequentially arrange the systematic modulation symbols along a time domain in symbol intervals including no reference symbol in one frequency tone, and then sequentially arrange the systematic modulation symbols along the time domain in the symbol interval in a next frequency tone.
Dependencies are inferred from the claim text.