Analysis And Simulation Of UWB Wireless Communication Systems Based On Quadratic Time-Hopping Sequences

Due to the superior characteristics such as faster data transmission, lower power consumption and stronger anti-multipath interference capability, Impulse Radio Ultra-Wide Band (IR-UWB) communication technology has been considered as a hot topic in the development and research of current wireless communication field, and also been regarded as one of the key technology for wireless communication in the next generation.In Ultra-Wide Band communication system, the quality of time-hopping sequences, to a great extent, conditions the features of pulse position modulation (PPM) and pulse amplitude modulation (PAM). In reference to communication system, with time-hopping sequences should perform in perfect quality of correlation, namely, good auto-correlation and cross-correlation properties.On the basis of quadratic time-hopping sequences research, the thesis carries out analyses towards the correlation performances of general quadratic time-hopping sequences, cubic time-hopping sequences and hyperbolic time-hopping sequences successively, and in the mean time, comparisons of their communication qualities haven been undertaken.The thesis focuses on the design and realization of Ultra-Wide Band communication system simulation platform on the basis of quadratic time-hopping sequences. For the purpose of comparison, the thesis employs MATLAB7.0 software as emulation tool, and as a result, Ultra-Wide Band communication system simulation platform has been established for massive emulation experiments. Simulation platform channel makes use of multi-path channel model provided by IEEE802.15.3a team, and therefore, analyses as well as comparisons towards systematic qualities have been undertaken respectively with reference to different modulation scheme, under multi-user condition.The thesis carries out analyses towards the aspects of theories and simulations. Under multi-path condition, the thesis works out multiple access quality of Ultra-Wide Band communication system based on quadratic time-hopping sequences, and furthermore, simulation analyses have been performed in the thesis. Consequently, under the same modulation scheme, general quadratic time-hoppingsequences, due to the superior characteristics of auto-correlation as well as cross-correlation, possess the best quality of the bit error rate (BER). However, under PAM modulation scheme, systematic characteristics take superiority over PPM modulation scheme.