摘要
高速数据传输是地空数据链的发展趋势。当前器件的工作速度是高速应用的瓶颈,为了能在较低速度的器件上实现高速处理,必须根本性地改变算法结构,采用并行处理方式。并行结构会对解调器的时间同步和载波同步造成影响,需加以研究。为实现高速数据解调,提出了并行处理的解调器结构,研究了并行结构下的定时同步和载波同步方法,分析了克服符号间干扰的判决反馈均衡算法,探讨了抑制宽带信号中窄带干扰的自适应干扰对消方法。
High rate data transmission is the trend of development for ground-to-air data links. The operation speed of current electronic devices is the bottleneck for high speed applications. To realize high speed processing on devices of lower speed, the algorithm structure must be totally changed, and parallel mode should be adopted. It is necessary to study parallel mode, which may affect symbol synchronization and carrier synchronization. A parallel processing structure of demodulator is proposed for high speed data demodulation. The method of symbol synchronization and carrier synchronization in parallel structure is analyzed. To overcome inter-symbol interference, the structure and algorithm of decision feedback equalization （ DFE ） are analyzed. The adaptive narrowband interference cancelation for suppression of narrowband interference in desired broadband signal is analyzed.
出处
《无线电工程》
2009年第2期32-34,共3页
Radio Engineering
关键词
数据链
高速解调
同步
自适应
data link
high speed demodulation
synchronization
self adapting
