Bit-to-symbol mapping in LDPC coded modulation

Yuan Li; Chin Keong Ho; Yan Wu; S. Sun

doi:10.1109/VETECS.2005.1543379

Bit-to-symbol mapping in LDPC coded modulation

Yuan Li, Chin Keong Ho, Yan Wu, S. Sun

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

5 Citations (Scopus)

2 Downloads (Pure)

Abstract

Various bit-to-symbol mapping schemes are studied in an M-ary modulated system applying low-density parity-check (LDPC) code. By examining different assignment methods of LDPC codeword to two parallel channels with unequal signal-to-noise ratio (SNR), we find out that it is better to assign systematic bits of LDPC codeword to channels with higher SNR, even for regular LDPC code. Therefore, it is more advantageous to map as many systematic bits in LDPC codeword as possible to more significant bits (MSB) of the signal constellation in a LDPC coded M-ary modulation system. The performance gain achieved by this mapping scheme comes at no extra cost in power, rate and complexity.

Original language	English
Title of host publication	2005 IEEE 61st vehicular technology conference, VTC2005-spring Stockholm : paving the path for the future : 30 May - 1 June 2005, Stockholm, Sweden
Place of Publication	New York
Publisher	Institute of Electrical and Electronics Engineers
Pages	683-686
Volume	1
ISBN (Print)	0-7803-8887-9
DOIs	https://doi.org/10.1109/VETECS.2005.1543379
Publication status	Published - 2005
Event	61st Vehicular Technology Conference (VTC 2005-Spring) - Stockholm, Sweden Duration: 30 May 2005 → 1 Jun 2005 Conference number: 61

Conference

Conference	61st Vehicular Technology Conference (VTC 2005-Spring)
Abbreviated title	VTC 2005-Spring
Country	Sweden
City	Stockholm
Period	30/05/05 → 1/06/05

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title = "Bit-to-symbol mapping in LDPC coded modulation",

abstract = "Various bit-to-symbol mapping schemes are studied in an M-ary modulated system applying low-density parity-check (LDPC) code. By examining different assignment methods of LDPC codeword to two parallel channels with unequal signal-to-noise ratio (SNR), we find out that it is better to assign systematic bits of LDPC codeword to channels with higher SNR, even for regular LDPC code. Therefore, it is more advantageous to map as many systematic bits in LDPC codeword as possible to more significant bits (MSB) of the signal constellation in a LDPC coded M-ary modulation system. The performance gain achieved by this mapping scheme comes at no extra cost in power, rate and complexity.",

author = "Yuan Li and Ho, {Chin Keong} and Yan Wu and S. Sun",

year = "2005",

doi = "10.1109/VETECS.2005.1543379",

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publisher = "Institute of Electrical and Electronics Engineers",

address = "United States",

note = "61st Vehicular Technology Conference (VTC 2005-Spring), VTC 2005-Spring ; Conference date: 30-05-2005 Through 01-06-2005",

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Li, Y, Ho, CK, Wu, Y & Sun, S 2005, Bit-to-symbol mapping in LDPC coded modulation. in 2005 IEEE 61st vehicular technology conference, VTC2005-spring Stockholm : paving the path for the future : 30 May - 1 June 2005, Stockholm, Sweden. vol. 1, Institute of Electrical and Electronics Engineers, New York, pp. 683-686, 61st Vehicular Technology Conference (VTC 2005-Spring), Stockholm, Sweden, 30/05/05. https://doi.org/10.1109/VETECS.2005.1543379

Bit-to-symbol mapping in LDPC coded modulation. / Li, Yuan; Ho, Chin Keong; Wu, Yan; Sun, S.

2005 IEEE 61st vehicular technology conference, VTC2005-spring Stockholm : paving the path for the future : 30 May - 1 June 2005, Stockholm, Sweden. Vol. 1 New York : Institute of Electrical and Electronics Engineers, 2005. p. 683-686.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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AU - Ho, Chin Keong

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AU - Sun, S.

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N2 - Various bit-to-symbol mapping schemes are studied in an M-ary modulated system applying low-density parity-check (LDPC) code. By examining different assignment methods of LDPC codeword to two parallel channels with unequal signal-to-noise ratio (SNR), we find out that it is better to assign systematic bits of LDPC codeword to channels with higher SNR, even for regular LDPC code. Therefore, it is more advantageous to map as many systematic bits in LDPC codeword as possible to more significant bits (MSB) of the signal constellation in a LDPC coded M-ary modulation system. The performance gain achieved by this mapping scheme comes at no extra cost in power, rate and complexity.

AB - Various bit-to-symbol mapping schemes are studied in an M-ary modulated system applying low-density parity-check (LDPC) code. By examining different assignment methods of LDPC codeword to two parallel channels with unequal signal-to-noise ratio (SNR), we find out that it is better to assign systematic bits of LDPC codeword to channels with higher SNR, even for regular LDPC code. Therefore, it is more advantageous to map as many systematic bits in LDPC codeword as possible to more significant bits (MSB) of the signal constellation in a LDPC coded M-ary modulation system. The performance gain achieved by this mapping scheme comes at no extra cost in power, rate and complexity.

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DO - 10.1109/VETECS.2005.1543379

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