Use the fast Fourier transform function fft to analyse following signal. Plot the original signal, and the magnitude of its Spectrum linearly and logarithmically. Apply Hamming window to reduce the leakage. . The hamming window can be coded in Matlab as for n=1:N hamming(n)=0.54+0.46*cos((2*n-N+1)*pi/N); end; where N is the data length in the FFT.
标签： matlab fft
上传时间： 2015-11-23
上传用户：石灰岩123
Use fft to analyse signal by plotting the original signal and its Spectrum.
标签： matlab fft
上传时间： 2015-11-23
上传用户：石灰岩123
调制解调课程设计 16QAM调制解调代码。包括星座图，频谱分析，误码率分析。-16QAM modulation and demodulation curriculum design code modulation and demodulation. Including constellation, Spectrum analysis, bit error rate analysis.
上传时间： 2016-05-02
上传用户：ylqylq
扩展频谱通信(Spread Spectrum Communication)简称扩频通信，是指待传输的信息的频谱用某个特定的扩频函数扩展后成为宽频带信号，送入信道中传输，再利用相应手段将其压缩，从而获取传输信息的通信系统，也就是说传输信息所用的带宽远大于信息本身带宽。
标签： 序列
上传时间： 2018-04-08
上传用户：如果云知道
扩展频谱通信(Spread Spectrum Communication)简称扩频通信，是指待传输的信息的频谱用某个特定的扩频函数扩展后成为宽频带信号，送入信道中传输，再利用相应手段将其压缩，从而获取传输信息的通信系统，也就是说传输信息所用的带宽远大于信息本身带宽。
标签： 扩频系统
上传时间： 2018-04-08
上传用户：如果云知道
Licensed Spectrum remains 3GPP operators’ top priority to deliver advanced services and user experience Opportunistic use of unlicensed Spectrum is becoming an important complement for operators to meet the growing traffic demand Moving forward 3GPP operators will have two options to offload traffic to unlicensed Spectrum: 1. Wi-Fi (via LTE/Wi-Fi interworking) 2. LTE over unlicensed It will then be up to each individual operator to choose which approach to use, which will depend on a number of factors
标签： 3GPP_unlicensed_Dino_Flore 2015 01
上传时间： 2020-05-25
上传用户：shancjb
The growing interest for high data rate wireless communications over the last few decades gave rise to the emergence of a number of wideband wireless systems. The resulting scarcity of frequency Spectrum has been forcing wireless system designers to develop methods that will push the spectral efficiency to its limit.
标签： Algorithms Baseband Receiver
上传时间： 2020-05-26
上传用户：shancjb
According to the statistics of the Federal Communications Commission (FCC), temporal and geographical variations in the utilization of the as- signed Spectrum range from 15% to 85%. The limited available radio spec- trum and the inefficiency in Spectrum usage necessitate a new commu- nication paradigm to exploit the existing Spectrum dynamically.
上传时间： 2020-05-26
上传用户：shancjb
Cognitive radio has emerged as a promising technology for maximizing the utiliza- tion of the limited radio bandwidth while accommodating the increasing amount of services and applications in wireless networks. A cognitive radio (CR) transceiver is able to adapt to the dynamic radio environment and the network parameters to maximize the utilization of the limited radio resources while providing flexibility in wireless access. The key features of a CR transceiver are awareness of the radio envi- ronment (in terms of Spectrum usage, power spectral density of transmitted/received signals, wireless protocol signaling) and intelligence.
标签： Cognitive Wireless Network
上传时间： 2020-05-26
上传用户：shancjb
This book examines the technologies underlying the compression and trans- mission of digital video sequences over networking platforms. The incorporated study covers a large Spectrum of topics related to compressed video communica- tions. It presents to readers a comprehensive and structured analysis of the issues encountered in the transmission of compressed video streams over networking environments.
标签： Compressed Video Communications
上传时间： 2020-05-26
上传用户：shancjb
