林茂昭臺灣大學：電信工程學研究所蕭盟鐘Siao, Meng-JhongMeng-JhongSiao2007-11-272018-07-052007-11-272018-07-052006http://ntur.lib.ntu.edu.tw//handle/246246/58891隨著通訊技術的進步，利用電力線做高速的傳輸已成為可能。而且學術界與 工業界也投入愈來愈多的研發在這方面。 在我們的論文裡，設計了一個應用在電力線傳輸的通訊系統，採用部分 HomePlug1.0 和HomePlug AV 的規格。在做系統模擬的部分，採用Dostert 所提 出來的通道模型去模擬電力線的通道情形。接著，我們考慮幾種功率分配的演算 法，評估其應用在電力線傳輸環境的優劣；之後我們考慮高峰值功率比的問題， 和解決其問題的方法。With the improvement on communication technology, high speed data transmission through power-line comes true. More and more studying and research focus on power- line communications. In this thesis, we design power-line communication system based on some speci - cation provided by HomePlug1.0 and HomePlug AV. The Dostert power-line channel model is chosen to simulate the power line environment. We consider several bitload- ing algorithms. The e ect of high peak to average power ratio PAPR on OFDM and the associated PAPR reduction methods is also considered.1 INTRODUCTION 1 2 POWER-LINE ENVIRONMENT 4 2.1 Noise on Power-Line Channel . . . . . . . . . . . . . . . . . . . . . . 5 2.1.1 Classi cation . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.1.2 Noise Model on Power-Line Channel . . . . . . . . . . . . . . 7 2.2 Power-Line Channel Transfer Characteristics . . . . . . . . . . . . . . 8 2.2.1 Physical Characteristics . . . . . . . . . . . . . . . . . . . . . 8 2.2.2 Power-Line Channel Model . . . . . . . . . . . . . . . . . . . . 8 2.3 Power-Line Channel Models . . . . . . . . . . . . . . . . . . . . . . . 15 3 POWER-LINE COMMUNICATION SYSTEM 18 3.1 Review of OFDM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3.2 HomePlug speci cations . . . . . . . . . . . . . . . . . . . . . . . . . 19 3.2.1 HomePlug 1.0 [1][2] . . . . . . . . . . . . . . . . . . . . . . . . 19 3.2.2 HomePlug AV [3][4] . . . . . . . . . . . . . . . . . . . . . . . . 23 3.2.3 HP1.0 vs HPAV . . . . . . . . . . . . . . . . . . . . . . . . . . 26 3.3 Simulation System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 4 CODING for POWER-LINE CHANNELS 29 4.1 Reviews on Convolutional Code with Delay Processor . . . . . . . . . 29 4.1.1 Encoder of Convolutional Code with Delay Processor . . . . . 30 4.1.2 Decoder of Convolutional Code with Delay Processor . . . . . 31 4.2 Reviews on Convolutional Code with Convolutional Processor . . . . 31 4.2.1 Encoder of Convolutional Code with Convolutional Processor 31 4.2.2 Decoder of Convolutional Code with Convolutional Processor . 33 4.3 Simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 5 BIT LOADING and POWER ALLOCATION on the POWER-LINE CHANNEL 43 5.1 Loading Algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 5.1.1 Fischer Algorithm (water lling) . . . . . . . . . . . . . . . . . 45 5.1.2 Hughes Algorithm . . . . . . . . . . . . . . . . . . . . . . . . 46 5.1.3 Simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 5.1.4 Remarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 5.2 Simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 6 PAR REDUCTION in OFDM SYSTEM 58 6.1 PAR Problem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 6.2 Mathematic Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 6.2.1 PAR CCDF Analysis . . . . . . . . . . . . . . . . . . . . . . . 60 6.2.2 View PAR phenomenon from Algebra . . . . . . . . . . . . . . 63 6.3 Evaluate Continuous-Time PAR Using Discrete-Time Samples . . . . 64 6.3.1 Interpolation . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 6.3.2 Moderate Oversampling Factor L . . . . . . . . . . . . . . . . 65 6.4 PAR reduction scheme . . . . . . . . . . . . . . . . . . . . . . . . . . 66 6.4.1 High-Peak-Set Transferring Method . . . . . . . . . . . . . . . 66 6.4.2 Clipping Method . . . . . . . . . . . . . . . . . . . . . . . . . 71 6.4.3 Mixture : PTS+RCFSGP . . . . . . . . . . . . . . . . . . . . 80 6.5 Simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 7 CONCLUSION 86 Bibliography 884063874 bytesapplication/pdfen-US電力線通訊電力線power-line communicationspower-linethesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/58891/1/ntu-95-R93942107-1.pdf