上行SCMA信道估计及性能评估

doi:10.11959/j.issn.1000-0801.2017267

Abstract

Abstract:

There are two types of physical mapping for SCMA named RE-Sparse SCMA and RB-Sparse SCMA.A frequency division multiplexing (FDM) based pilot pattern was proposed for RE-Sparse SCMA,and existing code division multiplexing pilot patterns based on cyclic shift and orthogonal cover code (OCC) were considered.Under different frequency selective channels,simulation and evaluation work for the two mapping schemes of SCMA had done.Besides,a target user selection strategy was proposed for existing SIC-MPA.Analytical simulation results show that both OCC and FDM can improve system performance with slot fading channel.Compared with RE-Sparse SCMA,RB-Sparse SCMA with partially frequency orthogonal pilot pattern enjoys better performance gain,and it is more applicable for realistic multi-user SCMA scenario.

Key words: 5G, non-orthogonal multiple access, uplink SCMA, pilot pattern, channel estimation, SIC-MPA

CLC Number:

TP393

Xian’an HU,Xiangnian ZENG. Channel estimation and performance analysis for uplink SCMA system[J]. Telecommunications Science, 2017, 33(11): 169-178.

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参数	取值
载频/GHz	2
系统带宽/MHz	10
子载波间距/kHz	15
信道模型	TDL-C 300 ns/ETU
移动速度/（km·h^-1）	3
分配RB数	4，12
仿真时长/s	10
信道编码	Turbo，1/3
调制编码	C84
发送天线配置	1
接收天线配置	2

Channel estimation and performance analysis for uplink SCMA system

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