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HSPA+是3G演进过程中一种重要的系统要求,对于高速大容量的数据传输有了明显的提高。低密度奇偶校验码(Low Density Parity-Check Codes,LDPC码)性能优越,允许并行高速译码并且在长码长时性能优于Turbo码。研究了一种LDPC码在AWGN信道下的性能,并与卷积码进行了性能比较。研究表明,LDPC码相对于卷积编码方式有较大的编码增益。
HSPA + is an important system requirement in the evolution of 3G and has obviously improved the data transmission at high speed and large capacity. Low Density Parity-Check Codes (LDPC codes) are superior in performance, allowing parallel high-speed decoding and outperforming Turbo codes with long code lengths. The performance of an LDPC code under AWGN channel is studied and compared with that of convolutional code. Research shows that the LDPC code has a larger coding gain than the convolutional coding method.