Abstract
Low-density parity-check codes have gained interest due to their excellent error-correction capacities, and performance is very close to the Shannon limit. There are also more and more communication systems adopt LDPC codes like 802.11n, 802.16e ....In this thesis, we survey the implement of LDPC decoder in recent years. We will find that it is very difficult to implement LDPC decoder because of high routing complexity. Implementing the LDPC decoder of multiple- code rates is more difficult. We will take every advantage of papers to design low-complex and good performance. The most suitable decoding algorithm “Layered Belief Propagation Algorithm” is chosen to implement because of lower complex. We will choose Benes Network to solve the problem of routing network because Bense network is better than the traditional routing network. We design the control algorithm of Benes Network in order to save memory and reduce the complexity of the control. Finally, our architecture of LDPC decoder can support multiple- code rates without consuming too much hardware cost. We also analyze the result in order to make our structure better.