Multi-mode message passing switch networks applied for QC-LDPC decoder

—The multi-mode message passing switch networks for multi-standard QC-LDPC decoder are presented. An enhanced self-routing switch network with only one barrel shifter permutation structure and a shifter-based two-way duplicated switch network are proposed to support 19 and 3 different submatrices defined in IEEE 802.16e and IEEE 802.11n. These proposed switch networks can route the decoding message in parallel by different sizes without signal congestion. The enhanced self-routing switch network can switch the messages at different expansion factors with the lowest hardware complexity. Under the condition of a smaller expansion factor, the decoder throughput can be enhanced from the two-way duplicated switch network by increasing the parallelism. In the 130nm CMOS synthesis result, the proposed enhanced self-routing and

• Type: Conference
• Year: 2008
• Where: ISCAS
• Authors: Chih-Hao Liu, Chien-Ching Lin, Hsie-Chia Chang, Chen-Yi Lee, Yarsun Hsua
• Keywords: Enhanced Self-routing Switch, Hardware, ISCAS 2008, Switch Network, Two-way Duplicated Switch