A memory efficient parallel layered QC-LDPC decoder for CMMB systems

作者：Li, Jiangpeng; Ma, Jun; He, Guanghui^*

来源：Integration, the VLSI Journal, 2013, 46(4): 359-368.

DOI：10.1016/j.vlsi.2013.01.001

• China Multimedia Mobile Broadcasting (CMMB) system
• Memory efficient
• Parallel layered LDPC decoding

This paper presents a memory efficient architecture of layered decoder for the dual-rate LDPC codes in the China Multimedia Mobile Broadcasting (CMMB) system. An efficient scheme for reducing the memory block number is proposed to increase the memory usage efficiency, so that the quantity of memory bits, decoder area and power consumption is significantly reduced. At the same time, the memory structure keeps the "one cycle one layer access" timing schedule to achieve high decoding throughput. Furthermore, the early termination strategy is employed to further increase the throughput; a non-uniform quantization scheme and an area efficient calculation module are developed to further improve the memory efficiency and hardware resource efficiency, respectively. By using SMIC 130 nm 1P7M CMOS process, the decoder is implemented and the core area is 5.29 mm(2). The total memory bits consumption is only 130.5 K which consumes 2.53 mm2 memory area.

• 出版日期2013-9
• 单位上海交通大学