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communication-simulation

這是將我目前在LAB所學到的知識,進行模擬的結果
目前主要專攻於ofdmmimo的模擬先暫時告一段落XDD

使用前說明

該repository的所有模擬在python3.5.2(64bits)環境下可順利執行
請先至官網下載python3.0以上的版本,建議用3.5.2
安裝時請記得勾選Add Python 3.5 to PATH,之後才能直接在命令提示字元中執行python
若沒有勾選的話,需要在安裝完後將python直譯器執行檔路徑加入環境變數PATH中,才能在命令提示字元中執行python

預設python3.5安裝路徑為C:\Users\user\AppData\Local\Programs\Python
使用者變數可設為

C:\Users\user\AppData\Local\Programs\Python\Python35\Scripts\;C:\Users\user\AppData\Local\Programs\Python\Python35

如此一來除了可以在命令提示字元中執行python直譯器,亦可執行Scripts資料夾中的pip、easy_install等腳本檔

接下來可以執行get-pip.py來下載並安裝pip腳本檔
再來可以用pip來安裝該模擬所需的套件
可在命令提示字元中輸入以下指令來下載並安裝繪圖套件matplotlib  

pip install matplotlib

而科學計算套件scipy的安裝會比較麻煩
請先到此網站下載numpy套件(64bit的OS 請下載amd64版本)
這裡下載scipy套件(64bit的OS 請下載amd64版本)
假設numpy的.whl檔下載至C:\Users\user\Downloads中
請執行命令提示字元,並進行如下步驟

先用cd指令切換目錄
cd /d C:\Users\user\Downloads

再用pip來安裝.whl檔
pip install 你下載的numpy.whl檔

安裝完numpy套件後才能scipy套件,注意順序不可顛倒
pip install 你下載的scipy.whl檔

最後我非常推薦使用PyCharm這套python IDE來編寫python程式





MIMO

主要分為capacity模擬、space-time block code(STBC)模擬、detection模擬   using channel state information(CSI)模擬、MU-MIMO模擬

OFDM

基本架構中,我花了些時間去模擬對ofdm symbol取樣的結果是否真的有IFFT關係
還有模擬ofdm的power spectrum density,及載波間的正交性關係,最後也做了是否考慮rayleigh fading的BER模擬
目前以完成探討symbol timing offset對星座的的影響問題

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