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The Research On Modulation Mode For Frequency-hopping

Posted on:2004-10-20Degree:MasterType:Thesis
Country:ChinaCandidate:J L CengFull Text:PDF
GTID:2168360122480073Subject:Communication and Information System
Abstract/Summary:PDF Full Text Request
The frequency-hopping communication is one of the most important technique to overcome interference and to increase system's capacity in the mordcn communication syslem.The performance of the frequency-hopping system rely on configuration and efficiency of the frequency spectrum of the selected modulation mode. The frequency difference sensitivity of the modulation mode and the ability to overcome distortion by limiting amplitude of the signal and to overcome interference also affect the performance, too.In this paper, the relationship between the ability to overcome interference and the modulation mode is discussed at first. Then the characters in some aspects specif'ed above of some common modulation mode such as MFSK MPSK OFDM are studied.On this base,some according solutions to the problem of the different frequency-hopping system are put forward.In the past half of this paper, the realization scheme , pcrforemance and improving measures of OFDM are studied. There are lot of simulations in this paper which validate the feasibility of the improving measures and the characters of the modulation mode.Comparing these modulation mode,wc think that MASK-OFDM frcqyency-hopping is the mode of frequency-hopping communication in future.
Keywords/Search Tags:frequency-hopping, MFSK, MPSK, OFDM
PDF Full Text Request
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