CAJ | 학술논문

MIMO技术在不增加信号带宽和发射功率的情况下，通过在发送端和接收端分别使用多个发送天线和接收天线来抑制信道衰落和噪声。利用MIMO技术的优势，设计了一种基于差分混沌键控（DCSK）的MIMO-DCSK混沌通信方案。针对这一方案，通过进一步的数学推导，得到系统在高斯信道下的理论误码率公式，并在MATLAB环境中进行了仿真验证。理论分析和仿真结果表明：在相同的信噪比条件下，MIMO-DCSK混沌通信系统的误码率比传统DCSK通信系统要小得多。因此，MIMO-DCSK混沌通信方案能够有效改善混沌通信系统的误码性能。
MIMO기술재불증가신호대관화발사공솔적정황하，통과재발송단화접수단분별사용다개발송천선화접수천선래억제신도쇠락화조성。이용MIMO기술적우세，설계료일충기우차분혼돈건공（DCSK）적MIMO-DCSK혼돈통신방안。침대저일방안，통과진일보적수학추도，득도계통재고사신도하적이론오마솔공식，병재MATLAB배경중진행료방진험증。이론분석화방진결과표명：재상동적신조비조건하，MIMO-DCSK혼돈통신계통적오마솔비전통DCSK통신계통요소득다。인차，MIMO-DCSK혼돈통신방안능구유효개선혼돈통신계통적오마성능。
Without the extra expenses of signal bandwidth and transmitter power, Multiple Input Multiple Output(MIMO) technology can suppress the channel fading and noise utilizing multiple antennas at both the sender and the receiver. Taking advantage of MIMO technology, a so-called MIMO-DCSK chaotic communication scheme has been proposed and imple-mented based on Differential Chaos Shift Keying(DCSK). In view of this scheme, the present work is able to obtain the analytical Bit Error Rate(BER)expression through advanced mathematical derivation. The analytical results have been latter validated by simulation in MATLAB. Theoretical analysis and simulation results show that under the same Signal to Noise Ratio(SNR), the BER of the MIMO-DCSK communication scheme is much smaller compared to that of the tradi-tional DCSK modulation scheme. Therefore, the MIMO-DCSK communication scheme can effectively improve the BER performance of the chaotic communication system.