Research and Modeling of UWB Wireless Communication System

UWB technology has become the research in the field of wireless communication , the development of a hot spot , and is considered one of the key technologies for the next generation of wireless communication . The UWB wireless communication can be divided into two types: non-carrier UWB carrier modulation UWB . There are a variety of implementations , carrier modulation UWB DS-CDMA UWB and MB-OFDM UWB . MB-OFDM as an important candidate for UWB spectrum efficiency, co - exist with other narrowband systems , and interference has a good performance , so the paper mainly studies based MB-OFDM UWB technology . This paper proposed adding the K parameter POFDM system in the system , the key technology to study the synchronization technology based on OFDM modulation UWB system , balancing technology, channel estimation algorithms reduce the PAPR of OFDM signal , in addition to simulation compared various equalization and channel estimation algorithm to select the appropriate algorithm for MB-OFDM UWB system and computer simulation of the IEEE indoor UWB wireless channel model , the analysis showed that for systems of this study , the use of phase equalization and joint channel estimation algorithm performance for the system receives algorithm . The UWB system described in Mode 1 ( tri-band mode) modeling and computer simulation in MATLAB 7.0 platform , the baseband processing portion of all parameters are in strict accordance with the provisions of the IEEE 802.15.3 protocol IEEE UWB channel section channel working Group released a standard channel used to test a variety of PHY solutions , simulation using frequency hopping and channel analysis in Chapter estimation techniques, including POFDM . Simulation in the 200Mbps rate mode consists of the OFDM symbols in each frame number of the case of 60 , the actual data rate is 177.78Mbps, band utilization is 0.3367 , by increasing the useful data subcarriers , to improve the coding rate or reducing the cyclic prefix , protection The interval length and the length of the training sequence can improve the bandwidth utilization . Finally in this chapter the different rates of the MB-OFDM UWB system link performance analysis , while in the case of the same rate and distance of the MB-OFDM UWB and the DS-CDMA UWB system compared obtained useful conclusions good system performance can be seen from the simulation data and graphics , all the indicators meet FCC requirements and provide a reference and foundation for subsequent hardware implementation .