基于高阶累积量的空时分组码盲识别算法研究

doi:10.11959/j.issn.1000-436x.2016087

Abstract

Abstract:

Aiming at the problems for blind recognition of space-time block code(STBC)in MIMO communication sys-tems,a method was exploited based on higher-order cumulants of received signals.Firstly,the model of received signals was given and the fourth-order cumulants of the received signals in multiple input single output(MISO)systems was ob-tained.Secondly,using the characteristics of coding matrix,it was proved that the fourth-order cumulants in different de-lay vectors presented non-null value that depended on the STBC sat the transmitter side.Finally,a classifier for the STBC was presented based on the Euclid distance between the experimental values of fourth-order cumulants and the theoretical ones.Simulations show that the method performs well even for low signal to noise ratio.

Key words: MISO communication system, space-time block code, blind recognition, non-null value

Li-min ZHANG,Qing LING,Wen-jun YAN. Blind recognition of STBC based on higher-order cumulants[J]. Journal on Communications, 2016, 37(5): 1-8.

Figures/Tables 11

码型	l₂=l₃	C_{40 y}
	1	0
SM(N_t=1)	2	0
	5	0
	1	1
Al( N_t=2 )	2	0
	5	0
	1	1
$OSTBC- \frac{3}{4} (N_{t} = 3)$	2	0.75
	5	0
	1	3.5
$OSTBC- \frac{1}{2} (N_{t} = 4)$	2	3
	5	1.5

时延向量	SM	Al	$OSTBC- \frac{3}{4}$	$OSTBC- \frac{1}{2}$
[0,0,1,1]	-0.076 9	0.988 1	0.984 7	3.566 0
[0,0,2,2]	0.042 5	0.021 2	0.744 1	2.966 8
[0,0,5,5]	-0.046 9	0.013 1	0.017 3	1.535 9

时延向量	SM	Al	$OSTBC- \frac{3}{4}$	$OSTBC- \frac{1}{2}$
[0,0,1,1]	1.046 5×10^-4	1.003 2	0.989 5	3.456 1
[0,0,2,2]	-0.009 0	-0.008 4	0.763 6	3.025 6
[0,0,5,5]	0.012 1	-0.006 3	-0.003 5	1.464 7

References 12

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星座	QPSK	8-PSK	16-QAM	64-QAM
m_{21 x}=C_{21 x}	1	1	1	1
C_{42 x}	-1	-1	-0.68	-0.619
m_{40 x}	-1	-1	-0.6588	-0.5495

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Blind recognition of STBC based on higher-order cumulants

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