The Optimization And Performance Analysis Of T_c-DTR Receiver With Narrow Band Interference

Ultra-Wideband(UWB)wireless communication technology is a kind of high-speed,short-range communication technology.It has the characteristic of low-power,low-cost,huge-capacity.It can realize spectrum-sharing,that is very important for today's spectrum shortage.There are many challenges in the realization of the UWB communication system,the design of UWB receiver is one of these challenges.There are many kind of UWB receivers,Tc-DTR receiver is researched in detai.Because UWB system must coexist with narrow-band system,at the same time there are man-made tone interference in military domain,Tc-DTR receiver is optimized,its anti-interference performance is analyzed.Firstly,a brief introduction of UWB system is made,then the pulse waveform,modulating method,channel model,narrow-band interference model,basic DTR receiver are introduced and improved.Tc-DTR receiver is studied emphatically with the direct-sequence frequency-extending,time-hopping frequency-extending is not used.The theoretical analysis about average bit error probability(ABEP)and miss probability is carried out with the single and multiple narrow-band interference.ABEP is determined by signal-to-interference ration(SIR),miss probability is determined by variance and mean.Through these theoretical analysis,the ability of anti-interference is related directly to the form of DS code,so a optimal system design method based on the DS code is proposed in this pape.After optimal sustem design,a performance analysis with the narrow-band interference is conducted in detail.With the single and multiple narrow-band interference situations,ABEP and miss probability is simulated with different SIRs,at the same time a comparison with the case of no-interference is made.The performance of TR and DTR receivers are analyzed,a comparison with Tc-DTR receiver is made.From the simulations,a conclusion that by optimal design the Tc-DTR receiver's performance is improved substantially can be obtained.By the optimal desig of DS code,the ability of anti-narrow-band interference of Tc-DTR receiver is enhanced obviously.The SIR is bigger,the improvement is more obviously.By the comparison of the single and multiple interference,The performance of single interference is much better than the multiple interference.Based on the above analysis,by the optimal design of DS code,the interference can be suppressed,at the same time the additive white noise can be restrained by the interference,so the performance of Tc-DTR receiver is improved.