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 |
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| 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 | |
| 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) |
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| Abbreviated title | VTC 2005-Spring |
| Country | Sweden |
| City | Stockholm |
| Period | 30/05/05 → 1/06/05 |
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Cite this
Li, Y., Ho, C. K., 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, pp. 683-686). New York: Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/VETECS.2005.1543379