| 摘要: |
| 针对复杂环境中通信系统误码率高和硬件实现复杂度高的问题，提出基于正交频分复用(Orthogonal Frequency Division Multiplexing，OFDM）时域差分和16进制幅度差分相移键控（16 Multilevel Differential Amplitude and Phase Shift Keying,16DAPSK）调制联合低密度奇偶校验码（Low Density Parity Check Code，LDPC）软译码的通信方案。充分考虑了差分调制对抗多径干扰的能力，分别通过单数据多位宽移位寄存器方案、查找表的方式以及公式法实现LDPC编码、16DAPSK调制以及16DAPSK软解调。仿真结果证明了该方案在误码性能和资源节省方面的有效性。 |
| 关键词: OFDM LDPC编码 16DAPSK 软解调 |
| DOI： |
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| 基金项目:国家自然科学基金资助项目（61761009）；广西科技计划项目（2018AD11018）；广西创新驱动发展专项(桂科AA21077008)；桂林市重点研发计划（2020010305） |
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| A differential high-order modulation combined with LDPC coding scheme and its FPGA implementation |
| YE Jincai,LI Guoyong,WANG Guofu,LI Lingqiao |
| (School of Information and Communication,Guilin University of Electronic Technology,Guilin 541004,China;School of Microelectronics and Material Engineering,Guangxi University of Science and Technology,Guilin 545616,China;School of Computer and Information Security,Guilin University of Electronic Technology,Guilin 541004,China) |
| Abstract: |
| For the problems of high bit error rate(BER) and high hardware implementation complexity of communication systems in complex environments,this paper proposes a time-domain differential and hexadecimal differential amplitude phase-shift keying(16DAPSK) based on orthogonal frequency division multiplexing(OFDM) modulation and low density parity check code(LDPC) soft decoding communication scheme.By fully considering the ability of differential modulation to fight against multipath interference,LDPC encoding,16DAPSK modulation,and 16DAPSK soft demodulation are realized through the single-data multi-bit-wide shift register scheme,look-up table method,and formula method.The simulation results prove the effectiveness of the proposed scheme in BER performance and resource saving. |
| Key words: OFDM LDPC encoding 16DAPSK soft demodulation |
《电讯技术》编辑部 