用于无人机卫星通信的LDPC高速编码器实现

Realization of LDPC High-speed Encoder for UAV Satellite Communication

为满足无人机卫星通信系统中高清音视频数据高通量、低功耗、高可靠传输的需求,提出一种基于DVB_S2标准的LDPC编码器。该编码器采用两级并行RAM存储阵列,可有效提高系统工作频率,降低FPGA逻辑资源的使用率,通过控制模块使编码器自适应兼容三种码率的LDPC编码。上述编码器已在ZYNQ7Z020系列芯片xc7z020clg400-2上实现,最高稳定工作主频为214.4 MHz,支持1/2、3/4、7/8三种典型码率。

To meet the requirements of high throughput,low power consumption,and high reliability transmission of highdefinition audio and video data in UAV satellite communication systems,a LDPC encoder based on DVB_S2 standard is proposed.The encoder adopts a two-level parallel RAM storage array,which can effectively improve the system's operating frequency and reduce the utilization of FPGA logic resources.Through the control module,the encoder is adaptively compatible with LDPC encoding of three different bit rates.The above encoder has been implemented on the ZYNQ 7Z020 series chip xc7z020clg400-2,with a maximum stable operating frequency of 214.4 MHz and supporting three typical bit rates:1/2,3/4,and 7/8.