摘要为进一步提高PPM 解调的性能, 系统以FPGA 为主控单元, 提出了一种改进的数字锁相环
提取时隙同步时钟和快速帧同步提取方案, 在传统的数字锁相环中添加了数字滤波器和FIFO …

With the development of digital communication, pulse-position modulation (PPM) has
become an important technique in wireless communication because of its efficient …

Orthogonal modulation superimposes non-amplitude-modulated signals on Manchester
coded or pulse position modulated amplitude shift keying (ASK) signals, allowing two traffic …

Low bandwidth expansion modulation schemes are preferred for free space and optical fibre
data transmission, where limited bandwidth is available. One such scheme is duobinary …

Currently, the pulse position modulation (PPM) schemes are suffering from bandwidth
application where the line rate is double that of the initial data rate. Thus, the offset pulse …

Two orthogonal modulation optical label switching (OLS) schemes, which are based on
payload of polarization multiplexing-differential quadrature phase shift keying (POLMUX …

Although the clock synchronization is of utmost importance in communications, it is quite
difficult to achieve in practice. Consequently, the asynchronous effect emerges as a critical …

Offset pulse position modulation (PPM) has been shown to be more attractive for use in
optical fibre channels than on–off keying, digital PPM and in some respects multiple PPM in …

Optical label switching (OLS) is a promising solution for rapidly growing packet based
internet traffic and data switching in data center. Most proposed schemes apply orthogonal …

Pulse position modulation (PPM) coding schemes have been proposed and investigated
widely as a technique of utilising the very high bandwidth available in optical fibres …