【正文】 ... 24 調(diào)制信號(hào) ............................................. 24 II 發(fā)送信號(hào) ............................................. 25 多徑信道 PPMTHUWB 接收機(jī) .................................. 27 連續(xù)時(shí)間信道沖激響應(yīng) ................................. 27 離散時(shí)間信道沖激響應(yīng) ................................. 27 THPPMUWB 接收機(jī) .................................... 28 本章小結(jié) ................................................... 29 第 4 章 IRUWB 無(wú)線通信信道仿真 ..................................... 30 發(fā)射端信號(hào)的仿真 ........................................... 30 二進(jìn)制 THUWB 信號(hào) .................................... 30 二進(jìn)制 THUWB 信號(hào)的 PSD 分析 .......................... 32 其他典型 IRUWB 信號(hào)及其功率譜密度仿真 ............... 36 標(biāo)準(zhǔn)信道模型 ................................. 49 PPMTHUWB 信號(hào)通過(guò)不同信道環(huán)境的仿真分析 .................. 57 高斯噪聲環(huán)境的信號(hào)傳輸 ............................... 58 信道環(huán)境下的信號(hào)傳輸 ................... 60 本章小結(jié) ....................................................... 63 結(jié)論 ................................................................ 64 致 謝 ............................................................. 66 參考文獻(xiàn) ........................................................... 67 摘 要 .............................................................. I Abstract ............................................................ I Chapter One Introduction ............................................ 1 UWB munications technology background and current situation .... 1 Technical characteristics of UWB ................................ 3 UWB and other relatively shortrange wireless technology ............ 4 UWB application prospects ...................................... 5 III Content and structure of paper ................................... 6 Chapter Two UWB channel model ....................................... 7 Channel characteristics ......................................... 7 Large scale fading ...................................... 7 Small scale fading ...................................... 7 Multipath effect ....................................... 8 UWB indoor channel model ..................................... 9 Indoor channel model .................................... 9 Indoor channel characteristic parameter .................... 12 standard channel model .................... 15 Summary ................................................... 19 Chapter Three IRUWB signal transmission and reception ................... 20 The basic principles of UWB radio munications ............... 20 IRUWB pulse ............................................... 21 Signal modulation ............................................ 23 Signalpluse modulation ................................. 23 Multipluse modulation .................................. 24 UWB systems to send signals ................................... 24 Basic signal ........................................... 24 Modulation signal ...................................... 24 Send signal ............................................ 25 Multipath channel PPMTHUWB receiver ....................... 27 Continuoustime channel impulse response .................. 27 Discretetime channel impulse response .................... 27 THPPMUWB Receiver ................................ 28 Summary ................................................... 29 Chapter Four IRUWB wireless munication channel simulation ..... 30 IV Simulation of the transmitter signal............................... 30 Binary THUWB Signals ................................ 30 Binary THUWB signal PSD analysis ...................... 32 Other typical IRUWB signal and its PSD simulation ......... 36 standard channel model ......................... 49 PPMTHUWB signals through different channels of the simulation environment ................................................. 57 Gaussian noise in the signal transmission ................... 58 Channel environment signal transmission ...... 60 Summary ......................................................... 63 Conclusion ......................................................... 64 Express thanks ..................................................... 66 References ......................................................... 67 1 第 1 章 緒論 超寬帶 (UWB)無(wú)線通信技術(shù)是近年來(lái)通信領(lǐng)域興起的一種無(wú)線互連技術(shù)。 關(guān)鍵詞： 超寬帶；脈幅脈位調(diào)制；功率譜密度；平均功率時(shí)延；均方根時(shí)延 Abstract Ultrawideband munication technology is a new shortrange wireless munication technology. It was used by very narrow pulses to transmit data with a high transfer rate, low power consumption, antimultipath capability and many other advantages， and because of the spectrum of power spectral density is extremely small, it usually has the characteristics of spread spectrum munication. The technology with its unique features is paying more attention by the munications and the academic, even the military. And it will make more development, access to an increasingly wide range of applications. The paper first briefly introduced the basic knowledge of ultrawideband wireless munications, which focuses on the THUWB signal propagation characteristics and pared the different of ultrawideband channel model with narrowband radio channel, based on this analysis of path loss model and the multipath fading model PPMTHUWB UltraWideband Signal Transmission. With using MATLAB simulated analysis the use of PPMTHUWB and PAMTHUWB signal the timedomain expression and the power spectral density (PSD), at the same time on the modified SV channel model for indoor modeling. On the basis of simulated analysis of the pulse signal of UWB channel model in transmission characteristics, on the impact of signal transmission under the analysis of model parameters. Key words: UltraWideband。它利用極窄脈沖傳輸數(shù)據(jù)，具有傳輸速率高、功耗低、抗多徑能力強(qiáng)等許多優(yōu) 點(diǎn)，并且由于頻