Design and analysis of a chaotic time-hopping PAM UWB system

Then the impact of the pulse repetition period,time-hopping slot time and pulse waveform on ICI was studied.

Focusing on the problem that the low transmitting efficiency and the high bit error rate of the current modulation techniques existed in ultra wideband(UWB) communication system,a time-hopping Mary biorthogonal pulse position modulation(TH-MBPPM) scheme was proposed.

According to the characteristic of time hopping PPM signal,it proposes integral system designing project about produced time hopping PPM signal,the structure division of system is introduced in detail.

The LIA technology incorporating the frequency and time hopping techniques to restrain and eliminate the coloured noise were proposed.

Study of UWB time-hoping(TH) controller based on of FPGA realization

The hybrid multiple access scheme,OVSF-TH,was presented based on the orthogonal variable spread factor(OVSF),and a corresponding correlation mask for this scheme was designed.

The point catastrophic modeland the accumulative point catastrophic model are described here, from which onecan derive some parameters such as catastrophic potential, catastrophic interval,catastrophic time and so on.

The parameters of catastrophe, such as catastrophic potential, catastrophic time and so on, are calculated in time domain.

Structures of the extended quadratic time-hopping sequences,the general class of quadratic time-hopping sequences and some of their special kinds were discussed.