摘要
对于存在深度衰落的多径信道,用判决反馈均衡器能得到好的补偿效果,但是传统判决反馈均衡器的设计中,所用的误差函数在信号星座图点的周围发生跳变,由此引起误码率的增大.采用新的误码函数设计,使用平滑的误差函数取代传统设计.仿真表明,误比特率在10-3至10-4时,新设计得到约0.1～0.2dB的处理增益;在低信噪比时,新设计的误码率低于传统设计.
Decision-feedback equalizer can compensate very well for the multi-path dispersive channels which have deep decadence, but in traditional design, the error function varies sharply around the signal＇s constellation points, and leads to the bit-error-fate＇s increase. A new error function was used, which was a smooth function instead of the traditional one. Simulations demonstrate, using the new design, about 0.2 dB processing gain can be attained comparing to the old when the bit error rate is between 10-3 and 10-4; and the value of bit error rate is lower in new design when the input signal-to-noise ratio is in the lower region.
出处
《计算机工程与设计》
CSCD
北大核心
2005年第12期3324-3326,共3页
Computer Engineering and Design
关键词
码间干扰
判决反馈均衡
误差函数
自适应信号处理
inter-symbol interference
decision-feedback equalization （DFE）
error function
adaptive signal processing
