低精度量化OFDM链路自适应传输方案  

Link Adaption for Low-resolution Quantized OFDM System

作　　者：李沙志远 杨熙 金石[1] LI Shazhiyuan;YANG Xi;JIN Shi(National Mobile Communication Research Laboratory,Southeast University,Nanjing 211189,China)

机构地区：[1]东南大学移动通信国家重点实验室,江苏南京211189

出　　处：《无线电通信技术》2022年第3期506-515,共10页Radio Communications Technology

基　　金：国家自然科学基金杰出青年基金(61625106);国家自然科学基金(61941104)。

摘　　要：面向未来OFDM无线传输与低精度量化技术深度融合的场景,考虑低精度量化导致的性能损耗和面对通信环境变化时系统鲁棒性较差的问题,设计一种低精度量化OFDM链路自适应传输方案。该方案利用丰富的参数配置模式和自适应参数调整策略,及时感知信道条件变化,灵活调整系统的调制方式、ADC量化精度和导频插入间隔,保持系统可靠传输。仿真结果表明:当信道条件逐渐恶化时能有效切换参数配置模式,维持较优误比特率性能和有效数据传输速率。This paper focus on the deep integration of OFDM wireless transmission and low-resolution quantization technology in the future.Considering the performance loss of low-resolution system and poor robustness in changing communication environment,we propose a low-resolution quantization OFDM adaptation transmission link.The proposed system makes use of rich parameter configuration modes and adaptive parameter adjustment strategies to sense changes in channel conditions in time and flexibly adjust the modulation method,ADC quantization resolution and pilot insertion interval of the system,so that the system can maintain reliable transmission.Simulation results show that the system can effectively switch parameter configuration mode when channel condition is gradually deteriorated and maintain better bit error rate performance and effective data transmission rate.

关 键 词：低精度ADC 链路自适应 OFDM接收机 GTurbo信号重构 

分 类 号：TN914[电子电信—通信与信息系统]