莱斯信道中通用PSAM帧格式的优化设计

doi:10.12305/j.issn.1001-506X.2021.06.27

系统工程与电子技术 ›› 2021, Vol. 43 ›› Issue (6): 1679-1685.doi: 10.12305/j.issn.1001-506X.2021.06.27

莱斯信道中通用PSAM帧格式的优化设计

王晓颖¹, 余忠洋¹, 朱敏¹, 白宝明^1,*, 刘为², 容琪龙²

1. 西安电子科技大学综合业务网理论及关键技术国家重点实验室, 陕西西安 710071
2. 中国电子科技集团公司第七研究所, 广东广州 510310

收稿日期:2020-07-03 出版日期:2021-05-21 发布日期:2021-05-28
通讯作者: 白宝明
作者简介:王晓颖(1996—), 女, 硕士研究生, 主要研究方向为无线通信理论及编码调制|余忠洋(1989—), 男, 博士研究生, 主要研究方向为无线通信理论及编码调制|朱敏(1986—), 女, 讲师, 硕士研究生导师, 博士, 主要研究方向为信道编码及无线通信|白宝明(1966—), 男, 教授, 博士研究生导师, 博士, 主要研究方向为信道编码及无线通信|刘为(1977—), 男, 高级工程师, 硕士，主要研究方向为宽带无线通信技术、4G/5G移动通信系统设计、无线资源管理与网络设计|容琪龙(1981—), 男, 工程师, 硕士，主要研究方向为4G/5G移动无线通信技术、宽带无线通信系统设计和设备研发
基金资助:
国家自然科学基金(61771364);国家自然科学基金(61701368);陕西省重点研发计划项目(2018ZDCXL-GY-04-05)

Optimization design of generalized PSAM format over Rician channel

Xiaoying WANG¹, Zhongyang YU¹, Min ZHU¹, Baoming BAI^1,*, Wei LIU², Qilong RONG²

1. State Key Laboratory of Integrated Services Networks, Xidian University, Xi'an 710071, China
2. The 7th Research Institute of China Electronics Technology Group Corporation, Guangzhou 510310, China

Received:2020-07-03 Online:2021-05-21 Published:2021-05-28
Contact: Baoming BAI

摘要/Abstract

摘要：

针对莱斯信道下导频受限的载波同步系统，研究了相应的数据帧格式的推广与优化设计问题, 以提升载波同步能力。首先基于标准导频符号辅助调制(standard pilot-symbol-assisted-modulation, S-PSAM)帧格式, 设计了一种通用的PSAM(generalized PSAM, G-PSAM)帧格式, 并推导了相应的联合数据辅助与非数据辅助的克拉美罗界(data-aided & non-data-aided Cramer-Rao bound, DA&NDA CRB)及其近似形式; 接着利用近似的DA&NDA CRB和经典的控制变量法(control-variate method, CVM)对G-PSAM帧格式进行了优化, 得到了一类优化的G-PSAM(optimized G-PSAM, OG-PSAM)帧格式, 同时与S-PSAM帧格式进行了比较。仿真结果表明, 无论使用短数据包传输还是长数据包传输, 不同导频块数下的OG-PSAM帧格式都表现出优于S-PSAM帧格式的估计性能。

关键词: 无线通信, 优化的通用导频符号辅助调制帧格式, 控制变量法, 克拉美罗界, 莱斯信道

Abstract:

Aiming at the carrier synchronization system with limited pilot frequency under Rician channel, the generalization and optimization design of the corresponding data frame format is studied, so as to improve the carrier synchronization ability significantly. Firstly, a generalized PSAM (G-PSAM) format is designed based on the standard pilot-symbol-assisted-modulation (S-PSAM) format, whose corresponding joint data-aided & non-data-aided Cramer-Rao bound (DA&NDA CRB) are derived and approximated. Then, an efficient solution to optimize the G-PSAM format is provided by means of the approximate DA&NDA CRB and the common control-variate method (CVM), resulting in a class of optimized G-PSAM (OG-PSAM) format and meanwhile comparing with the S-PSAM format. Simulation results show that the OG-PSAM format exhibits superior DA&NDA CRB performance to the S-PSAM format under the different pilot blocks for both the short-packet and long-packet transmissions.

Key words: wireless communications, optimized generalized pilot-symbol-assisted-modulation (PSAM) format, control-variate method, Cramer-Rao bound, Rician channel

中图分类号:

TN911.23

王晓颖, 余忠洋, 朱敏, 白宝明, 刘为, 容琪龙. 莱斯信道中通用PSAM帧格式的优化设计[J]. 系统工程与电子技术, 2021, 43(6): 1679-1685.

Xiaoying WANG, Zhongyang YU, Min ZHU, Baoming BAI, Wei LIU, Qilong RONG. Optimization design of generalized PSAM format over Rician channel[J]. Systems Engineering and Electronics, 2021, 43(6): 1679-1685.

图/表 5

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参数	变量名称	参数	变量名称	参数	变量名称
f_d	载波频偏	α₀²	直射信号的功率	I_{1, i}	导频间隔
θ	相偏	σ²	散射信号的平均功率	κ_P	导频采样时刻集合
T_s	符号周期	K	莱斯因子	κ_D	数据采样时刻集合
N	一帧长度	L_P	导频序列长度	r_k	接收信号
s_k	调制信号	M_D	数据序列长度	F₁₁	费歇尔信息矩阵元素
n_k	复高斯随机变量	m	导频块数	F₂₂	费歇尔信息矩阵元素
L	散射路径数	L_i	第i个导频块长度	$ \frac{E_{s}}{N_{0}}$	信噪比
α_i	幅度系数	M_j	第j个数据块长度	η	导频开销

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莱斯信道中通用PSAM帧格式的优化设计

Optimization design of generalized PSAM format over Rician channel

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