Bit manipulation techniques for LDPC coding in OFDM

This work considers a wireless OFDM system employing a short-length, regular, low density parity check code (LDPC) when only limited feedback is available between receiver and transmitter. Methods are discussed for combining the advantages of LDPC codes with adaptive techniques, when the transmitter...

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Bibliographic Details
Published in2008 IEEE 25th Convention of Electrical and Electronics Engineers in Israel pp. 378 - 379
Main Authors Salamon, T.E., Amrani, O.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.03.2008
Subjects
Adaptive systems
bit-loading
Channel state information
Feedback
Gain
LDPC
Modulation coding
OFDM
OFDM modulation
Parity check codes
Statistics
Transmitters
Wireless communication
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ISBN142442481X
9781424424818
DOI10.1109/EEEI.2008.4736551

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Summary:This work considers a wireless OFDM system employing a short-length, regular, low density parity check code (LDPC) when only limited feedback is available between receiver and transmitter. Methods are discussed for combining the advantages of LDPC codes with adaptive techniques, when the transmitter is subject to a restricting spectral mask. 0.5 dB gain is demonstrated when combining a regular, rate-half, LDPC code with adaptive bit-permutation using a constant modulation scheme over all subchannels. Gains of up to 1.5 dB are reported when combining this code with a BER-optimized adaptive bit-loading technique.
ISBN:142442481X
9781424424818
DOI:10.1109/EEEI.2008.4736551