CAJ | 학술논문

在莱斯衰落信道下,基于发射天线选择（ TAS)和正交空时分组码（ STBC)方案,研究了无线传感器网络（ WSN)系统的平均符号误码率（ ASEP )性能。基于标量加性高斯白噪声（ AWGN )信道的方法,推导出了使用多进制正交幅度调制（ MQAM)和最小频移键控调制（ MSK)的无线传感器网络系统的ASEP性能的精确闭合表达式。然后对不同条件下的系统性能做了数值仿真,数值仿真结果与理论分析结果相吻合,验证了理论分析结果的正确性。仿真结果表明：随着发射天线或接收天线数的增加,系统的ASEP性能得到了很好的改善,当使用16QAM调制,当SNR=12 dB,（3,3；6)系统的误码率是1×10-3,（4,4；8)系统的误码率是3×10-4,（5,5；10)系统的误码率是5×10-5。
재래사쇠락신도하,기우발사천선선택（ TAS)화정교공시분조마（ STBC)방안,연구료무선전감기망락（ WSN)계통적평균부호오마솔（ ASEP )성능。기우표량가성고사백조성（ AWGN )신도적방법,추도출료사용다진제정교폭도조제（ MQAM)화최소빈이건공조제（ MSK)적무선전감기망락계통적ASEP성능적정학폐합표체식。연후대불동조건하적계통성능주료수치방진,수치방진결과여이론분석결과상문합,험증료이론분석결과적정학성。방진결과표명：수착발사천선혹접수천선수적증가,계통적ASEP성능득도료흔호적개선,당사용16QAM조제,당SNR=12 dB,（3,3；6)계통적오마솔시1×10-3,（4,4；8)계통적오마솔시3×10-4,（5,5；10)계통적오마솔시5×10-5。
Based on transmit antenna selection and orthogonal space-time block code( OSTBC) scheme,the average symbol error probability ( ASEP ) of wireless sensor network ( WSN ) systems under Rice fading channels is investigated in this paper. Based on the scalar additive white Gaussian noise ( AWGN ) channel approach, the accurate closed form expressions for the ASEP of WSN systems are derived for multiple quadrature amplitude modulation(MQAM),and minimum shift keying modulation(MSK). Then the ASEP performance under different conditions is evaluated through numerical simulations. The numerical simulations results coincided with the theoretical results well. The accuracy of the analytical results is verified. Simulation results show that:the ASEP per-formance can be improved with the increase of the number of transmit antennas or receive antennas,when SNR=12 dB,the ASEP of(3,3;6)with 16QAM is 1×10-3,(4,4;8)is 3×10-4,(5,5;10)is 5×10-5.