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SSH 的详细使用方法如下：ssh [-l login_name] [hostname | user@hostname] [command] ssh[-afgknqtvxCPX246] [-c blowfish | 3des] [-e escape_char] [-iidentity_file] [-l login_name] [-o option] [-p port] [-Lport:host:hostport] [-R port:host:hostport] [hostname |user@hostname] [command]sshd为执行 ssh 的 daemon，在读者使用 ss.. 阅读全文
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DIFFERENTIAL ENCODINGOne of the common difficulties in communications engineering is that often the same terms are used to represent different ideas. Differential Encoding is one such term. We will describe here two common ways this term is used and unless you know these differences, they can lead . 阅读全文
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因為有師弟求助，要在DE2上產生一個1KHz的音頻信號，但是由於我也很久沒碰FPGA，所以昨日在DE2的資料光盤上找到一些e.g.，直接複製下來，拼了一個工程，成功產生1KHz的信號。硬件就是用FPGA控制WM8731音頻的IC，產生一個1KHz的音頻信號。語言使用Verilog 描述語言Besause a junior student ask for help. He want to generate a1KHz audio signal by DE2 borad. But in fact, I have not used FPGAfor a long time. So I find so. 阅读全文
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因為好久沒弄FPGA，最近安裝USB-Blaster驅動在WIN7下和XP不同，記錄一下Step 1在設備和打印機中找到為正常安裝的驅動USB-BlasterStep 2單擊打開屬性標籤Step 3單擊屬性以後，選擇更新驅動程序Step 4單擊瀏覽計算機以查找驅動設備程序軟件Step 5選擇好路徑，就可以安裝了 阅读全文
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Paper comes from :IEEE Journal on Selected Areas in Communications, Special Issue on “Cognitive Radio: Theory and Application”, vol. 26, no. 1, January 2008.Radio spectrum resourceis of fundamental importance inwireless communications. Nowadays, the access to radiospectrum is largely based on fixed 阅读全文
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In the computer room of CVPR conference, I am reading Nannan's blog about her feelings facing a suffering patient. I am shocked, by what she sees and by what she thinks.The oral session is being held, however, what the speaker is talking is tedious. Nannan's article makes me reflect the sign 阅读全文
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http://www.comsoc.org/best-readings-cognitive-radioBest Readings is a collection of Journal/Magazine Special Issues, books, articles, and papers on a featured topic. This Best Readings is on Cognitive Radio (CR) Communications and Networking. The contributors are: Ekram Hossain, Dusit Niyato, Ying-C 阅读全文
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我在时域, 你在频域, 需要经过傅立叶变换,才能发现你的美丽,我把爱的语言调制到星座,通过伪随机序列,载波到你的频率,并把波束赋形到你的接收阵列矩阵,你说我的爱噪声太大,经过层层滤波,原来发现,那是在宇宙开始的时候,我发给你的爱的微波背景辐射两百年前粗略的论断催生傅立叶变换不朽的缠绵我在z平面前凝视系统函数的极点祈祷你的收敛域回到我的单位圆 卷积采样 滤波 重建哪怕坐标已变换在抽取插值间守护你不失真的容颜拜读奥本海姆鸿篇以线性系统之名许愿：想像二阶无阻尼振荡到永远当信号只剩下离散的语言DTFT就成了无尽的思念我给你的藏在频谱间在奈奎斯特率之下混叠难现周期的重复被低通滤波还原最初的响应依... 阅读全文
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This article comes from there :http://www.cplusplus.com/reference/stl/vector/VectorVectorsare a kind of sequence container. As such, their elements areordered following a strict linear sequence.Vector containers are implemented as dynamic arrays; Just asregular arrays, vector containers have their e 阅读全文
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Description of FIR FiltersFIR filters are often used because they are simple and easy to understand [6]. Diagrams of the operation of an FIR filter are shown inFigure S1. An FIR filter works by multiplying an array of the most recent n data samples by an array of constants (called the tap coefficien 阅读全文