摘要
在专用短程通信系统中采用M PSK调制通信方式 ,以适应多种速率要求。给出了射频信道模型和微波数字锁相本振信号源的相位噪声模型 ,分析了微波本振信号源相位噪声的影响 ,仿真给出了相位噪声功率谱密度与系统误码率之间的关系。利用该结果 。
In order to support high and low data rate services in harsh mobile environments, the M-PSK modulated signals are introduced in DSRC systems. The RF channel model in DSRC systems and the digital phase locked loop (PLL) microwave local oscillator(LO) phase noise model are provided in the first place. Then, the degradation of the bit error rate (BER) caused by the presence of microwave LO phase noise is analytically evaluated, and effect of phase noise on RF communication signals is investigated by using a parameter. Finally, the simulation results of phase noise effect on the BER show that a relatively low BER can be obtained in wireless communication systems.
出处
《电波科学学报》
EI
CSCD
2004年第5期622-626,641,共6页
Chinese Journal of Radio Science
基金
"十五"国家科技攻关计划 (2 0 0 2BA4 0 4A2 3A)
关键词
专用短程通信系统
相位噪声
微波本振信号源
误码率
Bit error rate
Computer simulation
Microwave oscillators
Microwaves
Phase locked loops
