Design and Implementation of High-efficiency LDPC Encoder Based on DSP

With the development of communication technology, how to carry out reliable communication by introducing excellent error correction code technology in a low signal-to-noise ratio environment is a problem that people are concerned about. Based on the above background, the purpose of this paper is to design and implement a high-efficiency LDPC encoder based on DSP. This article first sorts out the basic principles of LDPC codes, studies the commonly used encoding algorithms and decoding algorithms for LDPC codes, and analyzes the algorithm mechanism; introduces the software and hardware platforms of the development board used in this topic, which is the design and implementation of the codec Provides theoretical basis and software and hardware development environment. According to the design plan and related parameters, the LDPC code encoding and decoding algorithm is implemented using DSP as the implementation platform. In terms of encoding implementation, iterative fast encoding algorithm is selected to reduce encoding delay and encoding complexity. In terms of decoding implementation, in order to overcome the shortcomings of large hardware implementation complexity of LDPC code BP decoding algorithm, in terms of hardware resource storage and data accuracy processing An improvement is proposed, and a QC_LDPC code decoder based on BP algorithm is designed and implemented. As a result, the measured performance is slightly lower than the theoretical performance, but the loss is less than 0.1dB, which basically does not affect the overall performance of the codec.