【正文】 }try{outputStream=()。實(shí)驗(yàn)步驟將實(shí)驗(yàn)所需RS232纜線準(zhǔn)備好，并將JAVA串口包復(fù)制到相應(yīng)地目錄下。LPF的波形應(yīng)接近圖44所示的理論波形。MU與BK同相或反相，其波形應(yīng)接近圖43所示的理論波形。環(huán)路剛剛由失鎖狀態(tài)進(jìn)入鎖定狀態(tài)時鑒相器輸出電壓為ud4的值為： V通信原理實(shí)驗(yàn)報告實(shí)驗(yàn)四 數(shù)字解調(diào)與眼圖一、實(shí)驗(yàn)?zāi)康?。答：平方運(yùn)算輸出信號中有2fc離散譜，模擬環(huán)輸出信號頻率等于2fc，二分頻，濾波后得到干擾波；184。10+5180。=18 HZ/V，根據(jù)實(shí)驗(yàn)結(jié)果計算環(huán)路同步帶ΔfH及捕捉帶ΔfP。環(huán)路處于失鎖狀態(tài)時，CAR和CAROUT頻率不相等。（用示波器觀察信源NRZOUT(AK)和調(diào)制2DPSK信號有無，兩者邏輯關(guān)系正確與否）。通信原理實(shí)驗(yàn)報告實(shí)驗(yàn)三 模擬鎖相環(huán)與載波同步一、實(shí)驗(yàn)?zāi)康?，以及環(huán)路的鎖定狀態(tài)、失鎖狀態(tài)、同步帶、捕捉帶等基本概念。接通電源，打開實(shí)驗(yàn)箱電源開關(guān)。掌握用鍵控法產(chǎn)生2ASK、2FSK、2DPSK信號的方法。全1碼對應(yīng)的AMI碼全1碼對應(yīng)的HDB3碼通信原理實(shí)驗(yàn)報告全0碼對應(yīng)的AMI碼（2）將KKK3置于0111 0010 0000 1100 0010 0000態(tài)，觀察并記錄對應(yīng)的AMI碼通信原理實(shí)驗(yàn)報告和HDB3碼。用示波器觀察數(shù)字信源單元上的各種信號波形。掌握AMI、HDB3碼的編碼規(guī)則。3）觀察體會直接序列擴(kuò)頻對誤碼率的改善程度 實(shí)驗(yàn)內(nèi)容1)搭建基于simulink搭建直接序列擴(kuò)頻仿真通信鏈路，觀察頻譜和波形 2）仿真分析在不同信道條件下的誤比特率性能?；谶@樣的考慮，最大比值合并把各支路信號加權(quán)后合并。其中，多天線分集接收技術(shù)就是一個非常重要且常見的方法。Bpsk通信鏈路QPSK通信鏈路BPSK AWGN參數(shù)移動通信系統(tǒng)QPSK AWGN參數(shù)用bertool畫出BPSK信號的誤碼率曲線（0~10dB）移動通信系統(tǒng)由此可見BPSK和QPSK的在同一Eb/No時誤比特率基本一樣，這與理論分析一致2)在1的基礎(chǔ)上，信號先經(jīng)過平坦（單徑）瑞利衰落，再經(jīng)過AWGN信道，假設(shè)接收端通過理想信道估計獲得了信道衰落值（勾選衰落信道模塊的“Complex path gain port”）。Frequency Response(FR)頻率響應(yīng)特性圖不再是平坦的，體現(xiàn)出了多徑信道的頻率選擇性衰落。t2=t.^2。希望在以后的實(shí)驗(yàn)中操作的更好。格式：Netstat[a][e][n][s][pprotocol][r][interval] 參數(shù)：a顯示所有連接和偵聽端口。該命令在運(yùn)行DHCP系統(tǒng)上的特殊用途，允許用戶決定DHCP配置的TCP/IP配置值。當(dāng)主機(jī)由用戶接收了電子郵件并想傳遞到另外一臺服務(wù)器，則它聯(lián)絡(luò)SMTP服務(wù)器。如：netease_2005 ～20個字符。根據(jù)第七次中國互聯(lián)網(wǎng)信息中心權(quán)威發(fā)布的調(diào)查數(shù)據(jù)顯示：電子郵箱、搜索引擎、新聞瀏覽排在網(wǎng)民最常使用的服務(wù)前三位。~，八臺機(jī)子每臺一個號碼，從號碼段中任選一個號碼。單擊文件夾的屬性，把此文件夾設(shè)置為共享，則在其四川工程職業(yè)技術(shù)學(xué)院電氣信息工程系它主機(jī)上能夠看到此文件夾，實(shí)現(xiàn)共享。在出現(xiàn)的“TCP/IP屬性”對話框中單擊“IP地址”，然后選擇“使用下面的地址”，進(jìn)行相應(yīng)的配置。微軟即在Windows系統(tǒng)中引入TCP/IP，并作為默認(rèn)的通信協(xié)議。四川工程職業(yè)技術(shù)學(xué)院電氣信息工程系實(shí)驗(yàn)二對等局域網(wǎng)組建一、實(shí)驗(yàn)?zāi)康?。用同樣的方法制做另一個接頭。通常主機(jī)和路由器的接口屬于MDI，交換機(jī)和集線器的接口屬于MDIX。雙絞線連接雙絞線采用的是RJ45連接器，俗稱水晶頭。（2）掌握不同雙絞線的線的排列順序。二、實(shí)驗(yàn)結(jié)果 Time(s): , Node: 1, Route path: 2 Time(s): , Node: 1, Route path: 2 Time(s): , Node: 1, Route path: 2 Time(s): , Node: 1, Route path: 2 Time(s): , Node: 1, Route path: 2 Time(s): , Node: 1, Route path: 2 Time(s): , Node: 1, Route path: 2 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): ***0, Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 42 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 542 Time(s): , Node: 1, Route path: 32 Time(s): , Node: 1, Route path: 32 Time(s): , Node: 1, Route path: 32 Time(s): , Node: 1, Route path: 32 Time(s): , Node: 1, Route path: 32 Time(s): , Node: 1, Route path: 32 Time(s): , Node: 1, Route path: 32 Time(s): , Node: 1, Route path: 32 Time(s): , Node: 1, Route path: 32 Time(s): , Node: 1, Route path: 32 Time(s): , Node: 1, Route path: 32 Time(s): , Node: 1, Route path: 32 Time(s): , Node: 1, Route path: 32 Time(s): , Node: 1, Route path: 32 Time(s): , Node: 1, Route path: 32 Time(s): , Node: 1, Route path: 32 Time(s): , Node: 1, Route path: 32 Time(s): , Node: 1, Route path: 32 Time(s): , Node: 1, Route path: 32 Time(s): , Node: 1, Route path: 32 Time(s): , Node: 1, Route path: 32 Time(s): , Node: 1, Route path: 32 Time(s): , Node: 1, Route path: 32 Time(s): , Node: 1, Route path: 32 Time(s): , Node: 1, Route path: 32 Time(s): , Node: 1, Route path: 2 Time(s): , Node: 1, Route path: 2 Time(s): , Node: 1, Route path: 2 Time(s): , Node: 1, Route path: 2 Time(s): , Node: 1, Route path: 2 Time(s): , Node: 1, Route path: 2 Time(s): , Node: 1, Route path: 2三、實(shí)驗(yàn)結(jié)果分析仿真過程中路由表變化：2，42，542，32，2。二、實(shí)驗(yàn)結(jié)果Node: 1, Layer: AppCbrClient,(4)Server address: 55 Node: 1, Layer: AppCbrClient,(4)First packet sent at [s]: Node: 1, Layer: AppCbrClient,(4)Last packet sent at [s]: Node: 1, Layer: AppCbrClient,(4)Session status: Not closed Node: 1, Layer: AppCbrClient,(4)Total number of bytes sent: 5120000 Node: 1, Layer: AppCbrClient,(4)Total number of packets sent: 10000 Node: 1, Layer: AppCbrClient,(4)Throughput(bits per second): 409600 Node: 1, Layer: AppCbrClient,(3)Server address: 54 Node: 1, Layer: AppCbrClient,(3)First packet sent at [s]: Node: 1, L