摘要
提出了一种智能天线技术与空时联合判决反馈均衡器相结合的空间滤波算法。实现方法是水下通信系统采用水听器阵列接收,进行多波束智能天线算法处理,得到多路空间滤波后的信号,再经过空时联合判决反馈均衡处理。该算法已应用于在实际的水下正交相移键控调制高速水声通信系统中,在相同条件下的湖水试验中,与传统的空间分集算法进行了比较,获得的误码率分别为2．9×10-3和8．62×10-2,多组试验结果表明该算法有效抑制了水下多径干扰的影响,获得了与空间分集算法相比低十倍的误码率。
A space filtering processing algorithm, smart antenna technology combined with temporal-space DFE equalization algorithm is proposed in this paper. Its implement courses are multi-antenna（hydrophone） receive, multi-beam smart antenna algorithm and spatio-temporal decision feedback equalization. The algorithm was used in an underwater QPSK modulation wireless communication system, error code rate result of this algorithm and traditional space diversity algorithm in same lake experiment condition separately are 2.9 × 10^-3 and 8.62 × 10^-2. This algorithm obtained lower 10 times error code rate than the diversity algorithm, and effectually restrained the influences of multi-path interference.
出处
《声学学报》
EI
CSCD
北大核心
2006年第1期79-84,共6页
Acta Acustica
基金
国家"863"计划基金(863-818-09-09)
"十五"国防预研基金(10106050302)资助项目
