摘要
如何在现有条件下满足飞跃提升的通信需求,如5G标准下高速的数据传输速率是无线通信领域的一项重要研究课题,必然地,高阶调制方式越发成为主流趋势。与应用最广泛的M-QAM调制相比,现有的M-APSK调制方式因其非线性信道敏感程度低的特点被广泛应用于卫星通信场景中。传统APSK星座构造方案主要集中在缩小APSK与高斯信道容量之间的差距或最大化信号点间的最小欧氏距离上,因此统筹考虑两大指标,基于高斯信道容量可实现的基础上对M-APSK的星座分布进行优化设计,提出了一种整形函数,通过增大最小欧氏距离改善了误码率指标,给出了相应的理论证明,并通过数据仿真给出了充分验证,一定程度上丰富了M-APSK调制方式的理论内容,拓宽了其研究范围。
How to meet the leapforward communication requirements under certain conditions,such as the highspeed data transmission rate under 5G standard is an important research topic in the field of wireless communication.Inevitably,the highorder modulation method has become the mainstream trend.Compared with the most widely used M-QAM modulation,the existing M-APSK modulation method is widely used in satellite communication scenarios due to its low nonlinear channel sensitivity.The traditional APSK constellation construction scheme mainly focuses on narrowing the gap between APSK and Gaussian channel capacity or maximizing the minimum Euclidean distance.This paper considers two major indicators in joint way,optimizes the M-APSK constellation distribution based on the achievable Gaussian channel capacity,and proposes a shaping function to improve the bit error rate by increasing the minimum Euclidean distance.Besides,the corresponding mathematical proof and simulation are provided.As a result,the theoretical content of M-APSK modulation is improved and the research range is broadened.
作者
蒋炫佑
魏以民
王雷
彭磊
Jiang Xuanyou;Wei Yimin;Wang Lei;Peng Lei(School of Communication Engineering,PLA Army Engineering University,Nanjing 210000,China)
出处
《信息技术与网络安全》
2018年第12期52-57,共6页
Information Technology and Network Security
基金
国家自然科学基金(61301157)
关键词
M-APSK调制
星座设计
最小欧氏距离
信道容量
M-APSK modulation
constellation design
minimum Euclidean distance
channel capacity
