A chirp spread spectrum (CSS) system uses a chirp signal which changes the instantaneous frequency according to time for spreading a transmission bandwidth. In the CSS system, the transmission performance can be simply improved by increasing the time-bandwidth product which is known as the processing gain. However, increasing the transmission bandwidth is limited because of the spectrum regulation. In this letter, we propose a correlation-based chirp rate allocation method to improve the transmission performance by analyzing the cross-correlation coefficient in the same time-bandwidth product. In order to analyze the transmission performance of the proposed method, we analytically derive the cross-correlation coefficient according to the time-bandwidth separation product and simulate the transmission performance. The simulation results show that the proposed method can analytically allocate the optimal chirp rate and improve the transmission performance.
|Number of pages
|IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
|Published - 2017 Apr
Bibliographical noteFunding Information:
This work was supported by the core technology R&D project of Agency for Defense Development, Korea (UD140076ED).
Copyright © 2017 The Institute of Electronics, Information and Communication Engineers.
- Bandwidth separation
- Chirp rate allocation
- Chirp spread spectrum
- Cross-correlation coefficient
- Multiple linear chirp
ASJC Scopus subject areas
- Signal Processing
- Computer Graphics and Computer-Aided Design
- Electrical and Electronic Engineering
- Applied Mathematics