Abstract
In this paper, a new kind of nonlinear combining receiver of fast frequency hopping/multiple frequency shift keying (FFH/MFSK) modulation in GPS system is proposed. The performance of the receiver is analyzed in the effects of partial band noise jamming over additive white Gaussian noise channel and Ricean fading channel. The diversity of the system is performed using multiple hops per data bit. The non-central F distribution is found in the random variable of the division combining algorithm under the partial-band noise jamming in the additive white Gaussian noise channel. The mathematical results of the bit error ratio of the division combining system are achieved in both fading and non-fading channels. The numerical results are achieved by the simulation environment of the signal transmission while the signal to noise ratio was relatively small and the partial band noise jamming factor is relatively large. It was shown that the GPS system using division combining receiver has better performance under the strong partial band interference than the system without diversity and system with self-normalized combining receiver. This performance gain is because that the interference signal is scattered into several hops and partly diminished by the operation of division algorithm. As its simple structure to be implemented and anti-interference property, the proposed combining algorithm is useful for GPS signal transmission in the strong partial band noise jamming environment.
Highlights
In this paper the transmission characteristic of the proposed FFH/MFSK receiver in the GPS system named division combining receiver [1, 2] is analyzed
According to the signal transition environment of GPS channel, the performance is analyzed with multiple hops per data bit under the fading channel [3, 4] with partial band noise jamming (PBNJ) and AWGN
The results show the proposed receiver has better performance at the same diversity level with the increasing of Eb/NJ
Summary
In this paper the transmission characteristic of the proposed FFH/MFSK receiver in the GPS system named division combining receiver [1, 2] is analyzed. It was shown that when the signal to jamming ratio is relatively low, the proposed MFSK system performances better than the system without diversity and self-normalized combining receiver [5, 6] while the diversity level increases. This performance gain is because of the interference signal which is scattered into several hops and partly diminished by the division operations of the system. The numerical results are shown for comparing the proposed algorithm with the self-normalized combining algorithm which is commonly used in the FFH GPS systems
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
