Joint Adaptation of Code Length and Modulation Formats in OFDM Systems

In order to reduce the signaling overhead in adaptive OFDM transmission systems being designed for B3G and 4G wireless communications, the basic resource unit, referred to as chunk, comprises a number of adjacent sub-carriers and OFDM symbol periods. A consequent open issue is the mapping of long co...

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Bibliographic Details
Published in:2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications pp. 1 - 5
Main Authors: Trifonov, P., Costa, E., Schulz, E.
Format: Conference Proceeding
Language:English
Published: IEEE 01.09.2006
Subjects:
Adaptive systems
Constellation diagram
Error correction codes
Land mobile radio
Mobile communication
Modulation coding
OFDM modulation
Resource management
Signal design
Wireless communication
ISBN:9781424403295, 1424403294
ISSN:2166-9570
Online Access:Get full text
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Summary:In order to reduce the signaling overhead in adaptive OFDM transmission systems being designed for B3G and 4G wireless communications, the basic resource unit, referred to as chunk, comprises a number of adjacent sub-carriers and OFDM symbol periods. A consequent open issue is the mapping of long codewords onto limited size chunks, especially when link adaptation per chunk is carried out. This paper proposes a new method for joint coding and modulation. A data packet, independently of its length, is encoded without any segmentation into a single codeword spanning different chunks employing different signal constellations. The parameters of the underlying error correction code are chosen independently of the signal constellation and no puncturing is required. Moreover, a joint adaptation of the code length and the modulation format is proposed to optimise the number of chunks allocated for transmission
ISBN:9781424403295
1424403294
ISSN:2166-9570
DOI:10.1109/PIMRC.2006.253957