CAJ | 학술논문

为了提高信息传输速率、灵活利用频谱，从多波段脉冲超宽带（ multiband impulse radio UWB，MB-IR-UWB）系统的工作原理出发，结合有限项扁长椭球波函数（ prolate spheroidal wave function，PSWF）良好的带限和正交特性，提出了一种新的多波段频谱划分方式，在此基础上搭建系统模型。通过推导给出在高斯白噪声背景下，采用TH-BPPM调制时的平均误比特率公式，并进行系统性能分析。仿真结果表明，在保证各波段间不干扰条件下，MB-IR-UWB 与单波段UWB系统有相同的误码性能，PSWF脉冲可用于数据的并行传输，信息传输速率有大幅度提高。同时，脉冲持续时间影响系统的误码性能， Tm ＝6 ns是波段数N ＝15时对应的最佳脉冲持续时间。
위료제고신식전수속솔、령활이용빈보，종다파단맥충초관대（ multiband impulse radio UWB，MB-IR-UWB）계통적공작원리출발，결합유한항편장타구파함수（ prolate spheroidal wave function，PSWF）량호적대한화정교특성，제출료일충신적다파단빈보화분방식，재차기출상탑건계통모형。통과추도급출재고사백조성배경하，채용TH-BPPM조제시적평균오비특솔공식，병진행계통성능분석。방진결과표명，재보증각파단간불간우조건하，MB-IR-UWB 여단파단UWB계통유상동적오마성능，PSWF맥충가용우수거적병행전수，신식전수속솔유대폭도제고。동시，맥충지속시간영향계통적오마성능， Tm ＝6 ns시파단수N ＝15시대응적최가맥충지속시간。
To improve the data transmission rate and to use spectrum more flexibly, on the basis of the operational theory of the multiband impulse radio UWB ( MB-IR-UWB) system, in combination with the excellent band-limited and orthogonal characteristics of the prolate spheroidal wave function ( PSWF) , a new multi-waveband spectrum al-location method was proposed in this paper. The system model was built and the mean bit error rate ( BER) formula was derived under additive white Gaussian noise and by applying binary time hopping pulse position modulation. Moreover, the system performance was analyzed via Matlab simulation. The results indicate that the MB-IR-UWB system has the same BER performance as the single-waveband UWB system under the condition of non-interference between different bands. The PSWF impulse can be used for the parallel transmission of data and the data transmis-sion rate will be significantly lifted. In addition, the PSWF pulse duration affects the BER performance of the sys-tem. Tm =6 ns is the best pulse duration for waveband number N =15.