时延有界的PD-NOMA物联网高可靠接入算法

doi:10.11959/j.issn.1000-436x.2020189

Abstract

Abstract:

A single-hop PD-NOMA network supporting k-successive interference cancellation (k-SIC) was considered.Given the real-time performance requirements,how to maximize the average reliability of uplink transmissions by the joint users grouping and power allocation was studied.A heuristic algorithm with complexity of O(nlogn) was presented,where n was the number of users.The algorithm was also proved to be the optimal if k=2.The performance evaluations reveal that the transmission reliability will increase exponentially with the linear degradation of the real-time performance guarantee.Besides,the transmission reliability is enhanced with respect to the random users grouping algorithm.

Key words: non-orthogonal multiple access, successive interference cancellation, delay, reliability, power allocation

CLC Number:

TP929.5

Chaonong XU,Jianxiong WU,Yongjun XU. Highly reliable access algorithm for PD-NOMA based IoT with delay guarantee[J]. Journal on Communications, 2020, 41(9): 210-221.

Figures/Tables 11

符号	含义
Y	基站处接收到的信号
U_i	用户i
G_i	用户i到基站的信道增益
p_i	用户i的发送功率
X_a，X_b	Alice和Bob发送的符号，只能取{-1,1}
A_i	用户i的归一化接收幅度
${\hat{A}}_{i}$	用户i的最大归一化接收幅度
BE(A_a,A_b)	Alice和Bob的归一化接收幅度为A_a和A_b时的传输位错误数
BER(A_a,A_b)	Alice和Bob的归一化接收幅度为A_a和A_b时的传输位错误率
$A_{\cdot \| A_{a}}$	给定A_a的条件下，使BER(A_a,A_b)最小的A_b值
$\tilde{A_{b \| {\hat{A}}_{a}}}$	$A_{\cdot \| A_{a}}$ 与 $A_{\cdot \| A_{a}}$ 的最小值
$б^{2}$	噪声功率
P((X_a=1\|(0,0))	Alice和Bob同时传输数据位0时，基站错误解码Alice数据位的概率
L	最大帧长
t_i	用户i的被调度时槽序号
$x_{j_{1}, \dots, j_{k}}^{(m)}$	用户j₁,…,j_k在时槽m上同时传输时的位错误数

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