Theoretical analysis and experiment of DOP-DGD for m sequence code

2005 ◽  
Author(s):  
Hong-Li Wang ◽  
Jinlong Yu ◽  
Jie Lv ◽  
Li-tai Zhang ◽  
Enze Yang
Keyword(s):  
Theoretical Analysis ◽  
Sequence Code ◽  
M Sequence

scholarly journals On the use of a multi-raster input of one-dimensional signals in two-dimensional optical correlators

2019 ◽  
Vol 43 (3) ◽  
pp. 391-396 ◽  
Author(s):  
M.S. Kuzmin ◽  
V.V. Davydov ◽  
S.A. Rogov
Keyword(s):  
Theoretical Analysis ◽  
Mathematical Description ◽  
Ambiguity Function ◽  
Sequence Type ◽  
Two Dimensional ◽  
One Dimensional ◽  
Optical Correlator ◽  
M Sequence ◽  
Chirp Signals ◽  
Optical Correlators

A mathematical description of a coherent optical correlator for the multi-raster input of long signals is given. It is shown that such an input makes it possible to reduce the value of false correlation maxima that are generally found at the output of a correlator with a single-raster input. It is shown that false maxima do not appear when processing signals with a thumbtack ambiguity function, allowing one to do without a multi-raster input. The results of the theoretical analysis are confirmed by experiments with chirp signals and M-sequence type signals.

A Design of Direct Sequence Spread Spectrum Module with Variable Bandwidth Based on FPGA

2014 ◽  
Vol 513-517 ◽  
pp. 3332-3335
Author(s):  
Guang Hui Cai ◽  
Ruo Xin Zhu ◽  
Wen Long Li ◽  
Shu Wen Zheng ◽  
Jun Yang
Keyword(s):  
Spread Spectrum ◽  
Direct Sequence Spread Spectrum ◽  
Pseudorandom Sequence ◽  
Security Level ◽  
Direct Sequence ◽  
Code Generator ◽  
Sequence Code ◽  
Variable Bandwidth ◽  
M Sequence ◽  
Spectrum Module

To make data bandwidth changeable and suit for different communication situations, thereby improving the utilization rate of hardware, this paper designed a direct sequence spread spectrum module with variable bandwidth and could used in a variety of occasions based on m sequence code generator with configurable series. The programmable m sequence code generator create a number of different pseudorandom sequence using FPGA programmable features and do XOR operation with signals waiting transmit. There for, it can achieve the purpose of spread spectrum. As the series can be changed, this module could fit normal communication, communication experiment, or other communication area which need high security level.

scholarly journals Ultra-low power m-sequence code generator for body sensor node applications

Integration ◽  
2019 ◽  
Vol 65 ◽  
pp. 231-240 ◽  
Author(s):  
Ahmad N. Abdulfattah ◽  
Charalampos C. Tsimenidis ◽  
Alex Yakovlev
Keyword(s):  
Low Power ◽  
Sensor Node ◽  
Code Generator ◽  
Ultra Low Power ◽  
Sequence Code ◽  
M Sequence
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