基于无率码的信息与能量同传中继信道传输速率的优化与实现

doi:10.11959/j.issn.1000-436x.2019092

Abstract

Abstract:

The optimization of the transmission rate and implementation of the simultaneous wireless information and power transfer in a relay system were studied.In a three-node two-hop system,the decode-and-forward protocol was employed by the relay node.One transmission period was divided into two phases.The first phase was the simultaneous transmission of the information and energy from the source to the relay.The received signal at the relay node was split to two parts.One part was used for information decoding,and the other was converted into energy for information forwarding in the second phase.In the second phase,the information was forwarded according to the decode-and-forward protocol by the relay.The power splitting factor was optimized to minimize the total time of the two hops for the transmission of a certain amount of information when the durations of the two hops were unequal.Furthermore,Raptor codes were combined with different modulation modes to realize different transmission rates on the two hops for the efficient utilization of the different channel capacities in the two hops.The selection mechanism of the codeword length of Raptor codes and modulation mode was given.The simulation proves that the two hops with unequal durations can achieve a higher throughput,and the capacity of the relay channel can be efficiently used by employing Raptor codes,and an efficient and reliable transmission is realized.

Key words: simultaneous wireless information and power transfer, rateles code, relay, Raptor code, modulation

CLC Number:

TN925

Weijia LEI,Minghao DONG. Optimization and realization of SWIPT relay channel transmission rate based on rateless code[J]. Journal on Communications, 2019, 40(5): 98-107.

Figures/Tables 12

SNR/dB	BPSK		QPSK		16QAM		64QAM		256QAM
SNR/dB	符号互信息/bit	一个码字长度/bit	符号互信息/bit	一个码字长度/bit	符号互信息/bit	一个码字长度/bit	符号互信息/bit	一个码字长度/bit	符号互信息/bit	一个码字长度/bit
-2	0.563 6	19 344	0.697 8	31 426	0.62	70 492	0.584 6	111 096	0.540 2	148 520
-1	0.643	16 955	0.828 2	26 478	0.749 7	58 296	0.705 1	92 112	0.674 2	123 040
0	0.721 5	15 111	0.971 9	22 562	0.899 3	48 600	0.843 4	77 004	0.821 6	103 008
1	0.795 1	13 712	1.125 6	19 482	1.069 4	40868	0.999 8	64 962	0.981 2	87 176
2	0.859 8	12 680	1.284 3	17 074	1.259 5	34 700	1.174 2	55 314	1.152 1	74 608
3	0.912 4	11 949	1.441 3	15 216	1.468 4	29 764	1.366 2	47 538	1.332 8	64 616
4	0.951 0	11 464	1.588 7	13 804	1.693 6	25 808	1.575 6	41 220	1.521 9	56 624
5	0.976 2	11 168	1.718 4	12 762	1.931 6	22 628	1.802 2	36 036	1.717 5	50 184
6	0.990 3	11 009	1.823 8	12 024	2.117 8	20 068	2.045 8	31 746	1.918 4	44 928
7	0.996 8	10 937	1.901 4	11 534	2.428	18 000	2.306 0	28 164	2.124 8	40 568
8	0.999 2	10 911	1.952 0	11 234	2.678 2	16 320	2.581 5	25 158	2.337 5	36 872
9	0.999 9	10 904	1.980 3	11 074	2.925 2	14 944	2.870 0	22 632	2.557 5	33 704
10	1.000 0	10 904	1.993 5	11 000	3.163 6	13 816	3.168 5	20 502	2.785 6	30 944
11	1.000 0	10 904	1.998 4	10 974	3.385 1	12 912	3.473 2	18 702	3.021 5	28 528
12	1.000 0	10 904	1.999 7	10 966	3.579 4	12 212	3.779 9	17 184	3.264 9	26 400
13	1.000 0	10 904	2.000 0	10 966	3.737 1	11 696	4.084 8	15 900	3.516 0	24 512
14	1.000 0	10 904	2.000 0	10 966	3.853 0	11 344	4.384 9	14 814	3.776 2	22 824
15	1.000 0	10 904	2.000 0	10 966	3.928 5	11 128	4.678 0	13 884	4.048 0	21 296
16	1.000 0	10 904	2.000 0	10 966	3.970 8	11 008	4.960 5	13 098	4.334 1	19 840
17	1.000 0	10 904	2.000 0	10 966	3.990 4	10 956	5.224 9	12 432	4.637 3	18 952
18	1.000 0	10 904	2.000 0	10 966	3.997 6	10 936	5.460 1	11 898	4.959 5	17 384
19	1.000 0	10 904	2.000 0	10 966	3.999 6	10 928	5.654 7	11 490	5.301 9	16 256
20	1.000 0	10 904	2.000 0	10 966	3.999 9	10 928	5.801 5	11 196	5.664 9	15 216
21	1.000 0	10 904	2.000 0	10 966	4.000 0	10 928	5.900 0	11 010	6.046 2	14 256
22	1.000 0	10 904	2.000 0	10 966	4.000 0	10 928	5.957 3	10 902	6.436 8	13 392
23	1.000 0	10 904	2.000 0	10 966	4.000 0	10 928	5.985 2	10 854	6.819 0	12 640
24	1.000 0	10 904	2.000 0	10 966	4.000 0	10 928	5.996 0	10 836	7.169 0	12 344
25	1.000 0	10 904	2.000 0	10 966	4.000 0	10 928	5.999 1	10 824	7.463 8	11 552

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调制方式	SNR/dB	累积互信息/bit
BPSK	-1.87	1.090 2×10⁴
QPSK	1.18	1.096 4×10⁴
16QAM	6.49	1.092 6×10⁴
64QAM	10.82	1.082 4×10⁴
256QAM	14.89	1.077 3×10⁴

P_s/dBm	第一跳	第二跳
-5.0	1.00×10^-3	1.06×10^-3
-4.7	1.10×10^-3	0.96×10^-3
-4.4	1.07×10^-3	1.05×10^-3
-4.1	0.93×10^-3	1.00×10^-3
-3.8	1.03×10^-3	0.97×10^-3
-3.5	0.83×10^-3	0.93×10^-3
-3.2	1.04×10^-3	1.10×10^-3
-2.9	0.90×10^-3	0.93×10^-3
-2.6	0.90×10^-3	0.9.×10^-3
-2.3	1.33×10^-3	1.00×10^-3
-2.0	1.00×10^-3	1.30×10^-3

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Optimization and realization of SWIPT relay channel transmission rate based on rateless code

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