High-speed LDPC code coder and coding method thereof

The invention relates to a high-speed LDPC code coder and a coding method thereof, belonging to the technical field of mobile communication channel coding. The coder comprises a primary and a secondary coding circuits, a temporary storage module and a control module. The primary and the secondary coding circuits each include a feedback shift register and an exclusive or gate. The primary coding circuit may obtain an intermediate vector based on a check matrix and an information bit. The temporary storage module is a register bank. The coder is characterized in that the output ends of two branches of primary circuits are connected with the register input ends of two branches of temporary storage modules; the output end of the register in the temporary storage module after passing through the control module is connected with the input end of the feedback shift register of the secondary coding circuit; and the secondary coding circuit obtains a check bit based on the intermediate vector and the check matrix. The method realizes coding by directly using the information of the check matrix, wherein the intermediate vector is obtained firstly and then the check bit is obtained based on the intermediate vector and the information in the check matrix. The method has high coding efficiency and can be widely applied to the technical field of the mobile communication channel coding.