Generalized LDPC decoding barrel shifter

The invention discloses a generalized LDPC (Low Density Parity Check) decoding barrel shifter. The shifter mainly comprises an MUX module, a Unshifted module and a muxreg module, wherein the MUX module is in signal connection with a cn_concat interface, a vn_concat interface and a first_half interface, the MUX module receives information of a check node through the cn_concat interface, and receives information of a variable node through the vn_concat interface; the Unshift module is in signal connection with the MUX module, and under the control of an input signal of the first_half interface,the Unshift module receives an input signal of the cn_concat interface or the vn_concat interface; the muxreg module comprises three cascaded sub-modules and is used for shifting output selection. According to the scheme, interleaved read-write of Vn and Cn data at different positions can be realized, the efficiency is high, and few resources are occupied. 本发明公开了一种通用化的LDPC译码桶形移位器，主要包括MUX模块、Unshifted模块和muxreg模块，其中，MUX模块与cn