<正>British linguist Wilkins(1972)points out,"Without grammar,little can be conveyed;without vocabulary,nothing can be conveyed."Grammar provides the overall pa
In this paper, a transmission system based on OFDM (Orthogonal Frequency Division Multiplexing) technique and channel estimation is proposed. The idea is to enh
This paper presents a comprehensive numerical and experimental study of Planar Inverted-F Antennas (PIFA) involving all the parameters which may affect the char