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| Synchronization Acquisition Using Early-Late Gate Based on Frequency-PN Sequence Double Pattern for FFH/BFSK Spread-Spectrum systems |
| Cheng Yu-fan;Li Shao-qian |
| National Key Lab of Communication, University of Electronic Science and Technology of China, Chengdu 610054, China |
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Abstract In this paper, a novel synchronization acquisition approach using the early-late gate for FFH/BFSK system is proposed, and it is based on frequency-PN sequence double pattern. Analytical and numerical results show the following advantages: the decision of threshold is more simple and accurate, and it overcomes the unreliableness of one-hop data demodulation, the unreliableness is caused by the not-alignment hop window of transmitter and receiver. The acquisition scheme can significantly improve the acquisition performance. When , where is the bit error rate and is the probability of synchronization acquisition. The analytical and numerical results are verified by a FFH testbed.
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Received: 23 October 2007
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2009, Vol. 31 
