Performance comparison of frequency-diversity and frequency-hopping spread-spectrum systems

1997 ◽  
Vol 45 (8) ◽  
pp. 910-912 ◽  
Author(s):  
G.K. Kaleh
Keyword(s):  
Spread Spectrum ◽  
Frequency Hopping ◽  
Performance Comparison ◽  
Frequency Diversity ◽  
Frequency Hopping Spread Spectrum ◽  
Spread Spectrum Systems

scholarly journals Study of Code Acquisition of FHSS System Over Rician Channel

2019 ◽  
Vol 24 (1) ◽  
pp. 68-76
Author(s):  
Muhanned Al-Rawi
Keyword(s):  
Spread Spectrum ◽  
Fading Channel ◽  
Time Synchronization ◽  
Frequency Hopping ◽  
Rician Fading ◽  
Frequency Diversity ◽  
Code Acquisition ◽  
Frequency Hopping Spread Spectrum ◽  
Pseudo Noise ◽  
Frequency Sequence

Abstract Frequency hopping is used in different communications systems for its robustness by providing frequency diversity against jamming and interfering signals. Successful detection and demodulation of a frequency hopping signal is dependent on proper tuning to transmit frequency and time synchronization of the burst. The sequence of hop frequencies is generally determined by a Pseudo-Noise (PN) sequence and time synchronization is achieved using synchronization preambles in the transmit burst. Successful acquisition of the hop frequency sequence could be achieved when at least a single burst’s data is successfully decoded at the receiver. This paper studies the serial search code acquisition which is the first step of synchronization for frequency hopping spread spectrum (FHSS) system over Rician fading channel. Simulation results show the effect of fading channel on the code acquisition.

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