Title :
Multi-rate LDPC decoder implementation for CMMB
Author :
Jiang, Xiaobo ; Yuan, Qun
Author_Institution :
Sch. of Electron. & Inf. Eng., South China Univ. of Technol., Guangzhou, China
Abstract :
In this paper, a multi-rate Low Density Parity Check (LDPC) decoder for China Mobile Multimedia Broadcasting (CMMB) is proposed. The architecture of proposed decoder only utilizes a parallel with 2 for ½ rate and 1 for ¾ rate can meet the throughput requirements for the CMMB standard. Various techniques are employed to significantly reduce memory and logic resources, including a special quantization scheme, solution for memory collision, the reuse properties of layered decoding, compressing of check-to-variable messages and the layered algorithm, which lead to a reduction of memory and logic resources by a half.
Keywords :
digital multimedia broadcasting; mobile communication; multimedia communication; parity check codes; quantisation (signal); CMMB standard; China mobile multimedia broadcasting; check-to-variable message; layered algorithm; logic resource; low density parity check decoder; memory collision; memory resources; multirate LDPC decoder implementation; special quantization scheme; Decoding; Field programmable gate arrays; Indexes; Lead; Memory management; Parity check codes; Random access memory;
Conference_Titel :
Intelligent Signal Processing and Communication Systems (ISPACS), 2010 International Symposium on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-7369-4
DOI :
10.1109/ISPACS.2010.5704699
