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劉偉成
2022  
年  
4  
月  
11  
日至  
17  
日
2.  
請記得在你的手機上寫下你的姓名和學生證
1.  
這是一次帶回家的考試。
4.您可以參考任何來源的任何信息,
包括但不
1
7.  
請在您的計算機程序中寫下註釋,
以清楚地解釋您的程序。
3.考試期間禁止與任何人討論。
6.  
您可以使用任何編程語言。
答題卡。
5.  
請在  
2022  
年  
4  
月  
17  
日之前將您的答題卡、
計算機程序和計算機程序輸出通過電子郵件發送給劉
偉成教授  
(comwcliu@ccu.edu.tw)。
僅限於互聯網和圖書館。
防範措施
國立中正大學
通信工程系
期中考試
無線通信的多輸入多輸出技術
Machine Translated by Google
2.  
編寫一個計算機程序來複製圖  
1.5  
中的  
NCBFSK  
曲線。
11.  
為了公平起見,
我們不接受遲交的答捲和
3.  
假設二進制相移鍵控  
(BPSK)  
調製與雙分支分集和相干等增益組合一起使用。
假設不
相關的多樣性分支與¯γ1  
=  
¯γ2  
=  
¯γc,
其中¯γk是j k是  
γk  
的平均值,  
k  
=  
1,  
2,  
γk  
=  
α,  
gk  
=  
αke
10.  
請盡可能詳細地寫下你的答案。
你用。
1.  
推導瑞利衰落信道上NCBFSK誤碼概率公式Eb/N0,
其中Eb為比特能量,  
N0為噪聲
功率譜密度。  
(10分)
9.  
在評論中,
還請說明如何編譯和運行您的計算機程序。
=  
|gk|
2
8.  
在評論中,
請指出什麼編程語言(S)
做
14.  
我會仔細檢查你的答捲和電腦程序。
如果發現其中任意兩者的相似度過高,
則判斷為
作弊。
13.不要作弊,
否則你的分數為零。
12.  
遲到答捲和電腦程序的分數為零。
計算機程序。
您必須在一個圖中繪製兩條曲線。
根據問題  
1  
中推導出的公式繪製第一條曲線。
使
用計算機模擬方法繪製第二條曲線。  
(20  
分)
kEav/N0,  
α  
與第  
k  
個信道相關的複數衰落增益,  
Eav是信號星座中的平均符號能量,
γc是平
均接收分支符號能量噪聲比。
導出瑞利衰落信道的誤碼概率。  
(20  
分)
問題集
2 2
2
Machine Translated by Google
4.  
在一張圖中繪製兩條曲線。
第一條曲線是根據問題  
3  
中的公式推導出來的。
用計
算機模擬的方法,
繪製出問題  
3  
條件下誤碼概率的第二條曲線。
(20  
分)
X  
的質量函數。
(20  
分)
5.  
證明  
1.9.2  
中的(b)。
注意:
舉個例子不是證明。  
(10
3
6.  
令  
X  
為離散隨機變量。
證明如果  
X  
∈  
{x1,  
x2, ...,  
xN },
其中  
N  
是正整數,
則當
pX(xi)  
=  
∀i  
時,
H(X)  
最大化,
其中  
H(X)  
是  
X  
的熵pX  
( x)  
是概率
點)
1
ñ
Machine Translated by Google

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