文献摘要信息 信系统目前有两种调制方式:二进制正交键控(BINARY ORTHOGONAL KEYING,BOK)调制和直接调制(DIRECT MODULATION,DM),基于BOK调制的超宽带系统实现简单,可靠性高,但信息传输速率不高.该文采用了一种改进的BOK调制方
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文章首先分析了DQPS K调制技术理论基础和直接射频调制发射系统体系结构。
In this paper, the theory of DQPSK and the architecture of DQPSK transmitter system are first analyzed.
结合矩阵变换器双空间矢量调制方法，并将矩阵变换器过调制方法用于感应电机直接转矩控制中，达到矩阵变换器开关频率恒定和电机快速转矩响应的目的。
Double space vector modulation and overmodulation of matrix converter were proposed in this paper to ensure the matrix converter switching frequency to be fixed and fast dynam-ic torque response.
探测器单体和准直器单体是硬X射线调制望远镜主要工作单元，它们的力学性能直接影响硬x射线调制望远镜的观测性能和精度。
The detector parts and the collimator parts are important components of hard X-ray telescope, which mechanics properties decides hard X-ray telescope directly.
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