分組衰落信道下LDPC的一種帶信道估計的改進Belief-Propagation算法
An Improved Belief-Propagation Algorithm with Channel Estimation of LDPC under Block Fading Channels
-
摘要: 該文首先通過仿真證明了LDPC(Low Density Parity Check code)在分組衰落信道下,以通常的Belief-propagation算法譯碼,具有較好性能.然后基于算法的特殊迭代特性,提出分組衰落信道下,在每一迭代步驟中結(jié)合信道估計的改進的Belief-propagation算法.仿真證明,該算法可以有效地減少譯碼迭代次數(shù).
-
關(guān)鍵詞:
- LDPC;信道估計;改進的Belief-propagation算法
Abstract: Firstly it is proved by simulation that the Low Density Parity Check(LDPC) code has sound performance under block fading channel when decoded by general belief-propagation algorithm. Then based on its special iterative nature, the improved belif-propagation algorithm is proposed under block fading channel with channel estimation in every iterative step. The simulation demonstrates that the proposed algorithm can effectively reduce the iterative times of decoding. -
MacKay D J C. Good error correcting codes based on very sparse matrices[J].IEEE Trans. on Info. Theory.1999, 45(3):399-[2]Gallager R G. Low density parity check codes[J].IRE Trans. on Info.Theory.1962, 8:21-[3]Gallager R G. Low density parity check codes. [PhD thesis],Cambridge, MA: MIT Press, 1963.[4]Di Changyan, Proietti D, Emre Telatar I, Richardson T J,Urbanke R L. Finite-length analysis of low-density parity-check codes on the binary erasure channel[J].IEEE Trans. on Info.Theory.2002,48(6):1570-[5]MacKa, D J C, Neal R M. Good codes based on very sparse matrices. Cryptography and Coding 5th IMA Conf., C.Boyd, ed,Lecture Notes in Computer Science, Berlin, Germany: Springer,1995, 1025: 100- 111.[6]Pearl J. Probabilistic Reasoning in intelligent systems: Networks of Plausible Inference. San Mateo, Calif: Morgan Kaufmann Pub., Inc., 1988: Chap 4.2.3, 162 - 174.[7]鄧建民.低密度碼編譯碼技術(shù)的研究[博士論文].北京:北京郵電大學(xué),2003. -
計量
- 文章訪問數(shù): 2461
- HTML全文瀏覽量: 148
- PDF下載量: 726
- 被引次數(shù): 0
下載:
