A new method for polyphase pulse compression codes modulation recognision based on IQPF and FRFT

Nowadays, compressing linear frequency modulated signals is usually based on DSP and realized by software. It is not only has no advantages on real-time operations but also has high requirements of hardware in processing a multitude of FFT points. Accordingly, we propose a new method to achieve the pulse compression of linear frequency modulated signals through FPGA and simulation results are also promoted. In contrast with using DSP, the new method based on FPGA has a much better performance on reliability, speed and a lower demand of hardware quantity.

Download Full-text

A new method of pulse compression for meteorological radar

2011 International Conference on Electric Information and Control Engineering ◽

10.1109/iceice.2011.5777216 ◽

2011 ◽

Author(s):

Ziwei Chen

Keyword(s):

Pulse Compression ◽

New Method ◽

Meteorological Radar

Download Full-text

Selective Sampling and Orientation of Non-Homogeneous Tissues

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100100238 ◽

1968 ◽

Vol 26 ◽

pp. 98-99

Author(s):

C. C. Clawson ◽

L. W. Anderson ◽

R. A. Good

Keyword(s):

Electron Microscopy ◽

Electron Microscope ◽

Light Microscopy ◽

Random Sampling ◽

New Method ◽

Microscope Examination ◽

Small Areas ◽

Selective Sampling ◽

Large Numbers ◽

Specific Orientation

Investigations which require electron microscope examination of a few specific areas of non-homogeneous tissues make random sampling of small blocks an inefficient and unrewarding procedure. Therefore, several investigators have devised methods which allow obtaining sample blocks for electron microscopy from region of tissue previously identified by light microscopy of present here techniques which make possible: 1) sampling tissue for electron microscopy from selected areas previously identified by light microscopy of relatively large pieces of tissue; 2) dehydration and embedding large numbers of individually identified blocks while keeping each one separate; 3) a new method of maintaining specific orientation of blocks during embedding; 4) special light microscopic staining or fluorescent procedures and electron microscopy on immediately adjacent small areas of tissue.

Download Full-text