We simulate uncoded BER of BPSK modulated data as a function of SNR -in an AWGN channel -in a Rayleigh fading channel -in an AWGN channel when direct sequence spreading is used and compare results to the theoretical ones. We assume coherent receiver and perfect synchronization.
標簽： modulated simulate function channel
上傳時間： 2014-01-11
上傳用戶：1109003457
source code for awgn,BPSK modulation and demodulation,channel simulation,convolution encoder,data generator,encoder and fading channel
標簽： demodulation convolution modulation simulation
上傳時間： 2017-04-14
上傳用戶：13517191407
很好的控件包，關于delphi的一寫flat控件
標簽： 控件
上傳時間： 2013-11-25
上傳用戶：851197153
Performance analysis of wireless networking with interleaving on the receiver side over Rayleigh fading channels.
標簽： interleaving Performance networking analysis
上傳時間： 2017-05-27
上傳用戶：lanhuaying
In 揚erformance of multi-carrier DS CDMA Systems?we apply a multi-carrier signaling technique to a direct-sequence CDMA system, where a data sequence multiplied by a spreading sequence modulates multiple carriers, rather than a single carrier. The receiver provides a correlator for each carrier, and the outputs of the correlators are combined with a maximal-ratio combiner. This type of signaling has the desirable properties of exhibiting a narrowband interference suppression effect, along with robustness to fading, without requiring the use of either an explicit RAKE structure or an interference suppression filter.
標簽： multi-carrier erformance signaling technique
上傳時間： 2017-07-31
上傳用戶：宋桃子
用于通信信道服從萊斯分布的仿真。注意：適用于產生0101碼，并且用星座圖判別誤碼率的仿真。
標簽： fician fading;通信
上傳時間： 2015-05-18
上傳用戶：wen123
Lithium–sulfur batteries are a promising energy-storage technology due to their relatively low cost and high theoretical energy density. However, one of their major technical problems is the shuttling of soluble polysulfides between electrodes, resulting in rapid capacity fading. Here, we present a metal–organic framework (MOF)-based battery separator to mitigate the shuttling problem. We show that the MOF-based separator acts as an ionic sieve in lithium–sulfur batteries, which selectively sieves Li+ ions while e ciently suppressing undesired polysulfides migrating to the anode side. When a sulfur-containing mesoporous carbon material (approximately 70 wt% sulfur content) is used as a cathode composite without elaborate synthesis or surface modification, a lithium–sulfur battery with a MOF-based separator exhibits a low capacity decay rate (0.019% per cycle over 1,500 cycles). Moreover, there is almost no capacity fading after the initial 100 cycles. Our approach demonstrates the potential for MOF-based materials as separators for energy-storage applications.
上傳時間： 2017-11-23
上傳用戶：653357637
介紹衰落信道中的數字通信原理及技術。作者：Marvin K. Simon和Mohamed-Slim Alouini。感覺內容深入淺出，適合作為無線通信方向的碩士或博士研究生的參考書。
標簽： Communication Channels Digital Fading over
上傳時間： 2018-05-20
上傳用戶：lzhxjd
Regardless of the branch of science or engineering, theoreticians have always been enamored with the notion of expressing their results in the form of closed-form expressions. Quite often, the elegance of the closed-form solution is overshadowed by the complexity of its form and the difficulty in evaluating it numerically. In such instances, one becomes motivated to search instead for a solution that is simple in form and simple to evaluate.
標簽： Communication Channels Digital Fading over 1st
上傳時間： 2020-05-27
上傳用戶：shancjb
Regardless of the branch of science or engineering, theoreticians have always been enamored with the notion of expressing their results in the form of closed-form expressions. Quite often the elegance of the closed-form solution is overshadowed by the complexity of its form and the difficulty in evaluating it numerically. In such instances, one becomes motivated to search instead for a solution that is simple in form and likewise simple to evaluate.
標簽： Communication Channels Digital Fading over 2nd
上傳時間： 2020-05-27
上傳用戶：shancjb
