Method and apparatus for mapping/demapping modulation symbols in a mobile communication system
First Claim
1. 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.
1 Assignment
0 Petitions
Accused Products
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.
-
Citations
7 Claims
-
1. 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. - View Dependent Claims (2)
-
-
3. 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. - View Dependent Claims (4)
-
-
5. 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. - View Dependent Claims (6)
-
-
7. 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.
-
Specification