TY - GEN
T1 - Construction and performance analysis of moderate-length rate-compatible LDPC codes
AU - Miao, Zhu
AU - Zesong, Fei
AU - Shenghui, Zhao
AU - Jingming, Kuang
PY - 2005
Y1 - 2005
N2 - Rate-compatible coding is appropriate for communication systems that may experience a range of operating SNRs but that seek to adhere to a single underlying codec structure. This paper proposes two special and efficient approaches: extending and information-nulling, to build low rate codes from high rate LDPC codes (mother codes) of moderate length (1034). Both the two proposed approaches result in better performances than punctured RC-LDPC codes at low code-rates. Extending leads to good performance at rate about 0.4-0.6, but which has not so good performance at high rates (about 0.6-0.8). The threshold of extended code rates is pointed out for the first time, which rests with the code-rate of the mother code. Information-nulling, which results in acceptable performance at high rates, and also good performance at low rates without any threshold of code rates, is confirmed to have a wider rate range and lower computation complexity than extending.
AB - Rate-compatible coding is appropriate for communication systems that may experience a range of operating SNRs but that seek to adhere to a single underlying codec structure. This paper proposes two special and efficient approaches: extending and information-nulling, to build low rate codes from high rate LDPC codes (mother codes) of moderate length (1034). Both the two proposed approaches result in better performances than punctured RC-LDPC codes at low code-rates. Extending leads to good performance at rate about 0.4-0.6, but which has not so good performance at high rates (about 0.6-0.8). The threshold of extended code rates is pointed out for the first time, which rests with the code-rate of the mother code. Information-nulling, which results in acceptable performance at high rates, and also good performance at low rates without any threshold of code rates, is confirmed to have a wider rate range and lower computation complexity than extending.
KW - Extending
KW - Information nulling
KW - Low density parity check codes
KW - Rate compatible
UR - https://www.scopus.com/pages/publications/33847280927
M3 - Conference contribution
AN - SCOPUS:33847280927
SN - 0780391284
SN - 9780780391284
T3 - MAPE2005: IEEE 2005 International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, Proceedings
SP - 1088
EP - 1091
BT - MAPE2005
T2 - MAPE2005: IEEE 2005 International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications
Y2 - 8 August 2005 through 12 August 2005
ER -