Interference suppression for frequency-hopped multiple-access receiver
In this dissertation, frequency hopped multiple access system is studied. Frequency hopped spread spectrum is commonly used in military application which is quite sensitive to interference. In this dissertation, bit error rate performance results of Binary Frequency Shift Keying (BFSK), Fast Freq...
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| Format: | Theses and Dissertations |
| Language: | English |
| Published: |
2018
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10356/76280 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | In this dissertation, frequency hopped multiple access system is studied. Frequency
hopped spread spectrum is commonly used in military application which is quite sensitive to
interference. In this dissertation, bit error rate performance results of Binary Frequency Shift
Keying (BFSK), Fast Frequency Hopped/ Binary Frequency Shift Keying (FFH/BFSK) and
Fast Frequency Hopped Multiple Access (FFH/MA) under Additive White Gaussian Noise
(AWGN), Rician and Rayleigh channels are studied. It also focuses on both intentional
interference and unintentional interference. Partial Band Noise Jamming (PBNJ) and Multiple
Access Interference (MAI) are mainly considered and their effects are studied. To mitigate the
effects, Maximum Likelihood (ML) receiver is used and its performance under fading and nonfading
channels are studied. Bit error rate performance of Maximum likelihood receiver is
compared with linear combining receiver which proves that the ML receiver is better in
performance than the linear combining receiver. The performance-affecting factors such as
number of users, fading channel, number of hops are also considered. |
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