核心论文，提出了基于混合纠错(HEC)方式的定长数据帧编码方法和关键参数的选取准则 ,在降低误码率的条件下保持了传输的高效性.-Core thesis, put forward error correction based on hybrid (HEC) mode of fixed-length data fr a me encoding methods and criteria to select key parameters in the lower bit error rate under