基于正交空时分组码的差分空间调制方案

doi:10.11959/j.issn.1000-436x.2017189

Abstract

Abstract:

Focusing on the problem that differential spatial modulation (DSM) couldn’t obtain transmit diversity and has high decoding complexity,a new differential spatial modulation scheme based on the orthogonal space-time block code was proposed and the proposed scheme is called OSTBC-DSM.There were two matrices in this scheme:the spatial modulation matrix and the symbol matrix.The former was aimed to activate different transmit antennas by setting the position of nonzero elements,and the latter structured symbolic matrix by using orthogonal space-time block codes (OSTBC) as the basic code block.The proposed scheme could obtain full transmit diversity and higher spectral efficiency compared with the conventional DSM schemes.Moreover,the OSTBC-DSM supported linear maximum likelihood (ML) decoding.The simulation results show that under different spectral efficiencies,the proposed OSTBC-DSM scheme has better bit error rate (BER) performance than other schemes.

Key words: differential spatial modulation, orthogonal space-time block code, transmit diversity, linear decoding

CLC Number:

TN929.53

Zhi-cheng WANG,Zhi-gang CHEN,Lei WANG. Differential spatial modulation scheme based on orthogonal space-time block coded[J]. Journal on Communications, 2017, 38(9): 148-158.

Figures/Tables 7

方案	每时隙激活天线数	发射分集	频谱效率	BPSK		QPSK		8PSK
方案	每时隙激活天线数	发射分集	频谱效率	N _t=2	N _t=4	N_t=2	N _t=4	N _t=2	N _t=4
DSM	1	1	$\frac{lb {⌊ (N_{t}!) ⌋}_{2^{P}}}{N_{t}} + lb M$	1.5	2.0	2.5	3.0	3.5	4.0
CS-DSM	1	2	$\frac{lb (Q' Q)}{N_{t}}$	1(L=2)	—	1.5(L=4)	—	2(L=8)	—
FE-DSM	1	N_t	$\frac{lb (M N_{t})}{N_{t}}$	—	0.75	—	1.00	—	1.25
FE-DSM-DR	1	2	$\frac{h lb (M g) + lb (h)}{N_{t}}$	1.00	1.25	1.50	1.75	2.00	2.25
OSTBC-DSM	1	2	$\frac{lb (L Q)}{N_{t}}$	1.50	2.25	2.00	2.75	2.50	3.25
OSTBC-DSM-RC	1	N_t	$\frac{lb (L Q)}{N_{t}}$	—	0.75	—	1.00	—	1.25

References 16

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调制方式	发射天线数	DSM		OSTBC-DSM
调制方式	发射天线数	频谱效率	复杂度（ML）	频谱效率	复杂度（线性译码）
BPSK	N_t=2	1.5	192	1.5	—
	N_t=4	2	12 288	2.25	16 384
QPSK	N_t=2	2.5	768	2	—
	N_t=4	3	196 608	2.75	28 672
8PSK	N_t=2	3.5	3 072	2.5	—
	N_t=4	4	3 145 728	3.25	53 248
16PSK	N_t=2	4.5	12 288	3	—
	N_t=4	5	50 331 648	3.75	102 400
32PSK	N_t=2	5.5	49 152	3.5	—
	N_t=4	6	8.053×10⁹	4.25	200 704

Differential spatial modulation scheme based on orthogonal space-time block coded

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