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Electrical and Computer Engineering
CSS; Non-linear chirp; Sine chirp; Orthogonality; Conditional orthogonality; Periodic orthogonality
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Non-Linear Chirp Spread Spectrum Communication Systems Of Binary Orthogonal Keying Mode, Quan Wang
Non-Linear Chirp Spread Spectrum Communication Systems Of Binary Orthogonal Keying Mode, Quan Wang
Electronic Thesis and Dissertation Repository
Chirp spread spectrum (CSS) is a suitable choice of modulation signals for wireless communications, due to its inherited advantages such as low transmission power, simplicity of implementation, good interference rejection capability. Linear chirps are common choices in practical CSS systems of binary orthogonal keying (BOK) mode. However, linear chirps generally require the time-bandwidth product of each chirp signal to be 60 sHz or more in order to achieve desirable orthogonality requirements. Thus, a BOK CSS system based on linear chirps has to occupy very wide bandwidth, which is a very precious resource for wireless communication. Clearly, the requirement on broad …