為了能夠滿足基站易于選址、優質快速的建站要求和易維護、低成本、高可靠的運行要求，本文對以方艙來實現一體化結構基站做出一番探討。從系統設計的觀點闡述了移動通信高性能基站天線設計的幾個關鍵問題，介紹了智能天線技術在基站中的應用，并且用HFSS軟件仿真了一種新型的對稱陣子天線，該天線駐波比小于2的帶寬可以達到60%，具有良好的寬頻帶特性。 Abstract: In order to meet the station construction requirement of easy site selection and fast base station， and meet the operational requirement of easy maintenance， low cost and high reliability， this paper discussed the unified architecture base station using shelter. Several key problems of high performance mobile communication base station antenna were illustrated from the view of system design， the application of smart antenna in base station was also introduced. And a novel dipole antenna was simulated by using HFSS， the VSWR of the antenna is less than 2， and the bandwidth was reach to 60%. So it has good broadband properties.
上傳時間： 2013-11-20
上傳用戶：linlin
DS-UWB的仿真框圖，誤碼率仿真，脈沖發生器，ook和bpsk調制，以及rake接收等
上傳時間： 2015-04-10
上傳用戶：大三三
This packet is a IS-95 baseband simulation for 1 data channel of 9.6 KBps rate. The simulation is written for static channel and AWGN noise. The packet include: 1) Packet Builder (Viterbi Encoding, Interleaver, PN generation) 2) Modulator (RRC filter) 3) Demodulator (Matched Filter, RAKE receiver) 4) Receiver (HD or SD) (Deinterleaver, Viterbi Decoder). You should run "Simulation.m" function that include all modules.
標簽： simulation baseband channel packet
上傳時間： 2014-11-09
上傳用戶：hwl453472107
This m-file displays the time waveform for the Gaussian pulse function and the first and second derivatives of the Gaussian pulse function for a 0.5 nanosecond pulse width. Other values of pulse widths may be used by changing fs,t,t1. The program uses the actual first and second derivative equations for the Gaussian pulse waveforms. The first derivative is considered to be the monocycle or monopulse as discussed in most papers. The second derivative is the waveform generated from a dipole antenna used in a UWB system. Other information is contained in the file.
上傳時間： 2015-05-08
上傳用戶：leixinzhuo
超寬帶系統鏈路matlab仿真程序 超寬帶系統簡單仿真平臺，有簡單界面.包括可替換的脈沖成型（半余弦脈沖）、IEEE802.15.3a的修正SV信道、最大似然信道估計、Rake接收機等模塊，可以實現monte carlo仿真求誤碼率。可添加多址接入、編碼等功能（維特比編解碼、幀同步的程序由本人同學編寫）。入口主程序uwbsim.m 編解碼程序：bin2deci.m；bini2deci.m；deci2bin.m VITRBI.m 信道及信道估計：ch_est.m；channel.m；channelgenerator.m；conv_m. m；sigfold.m UWB_SV_channel.m uwb_sv_cnvrt_ct.m uwb_sv_eval_ct.m uwb_sv_model_ct.m uwb_sv_params.m Rake接收機：findpeak.m；MRC_combine.m；MRC_Rake.m；n_upsample.m；selectpath.m 其他：cnv_encd.m；dssignal.m；Eb_halfcos.m；waveshape.m；halfcos_generator.m；metric.m；nxt_stat.m；sim_main.m；spreadgren.m；test_code.m；training_ds.m；uwbsim.m；vit_test.m
上傳時間： 2013-12-30
上傳用戶：duoshen1989
his packet is a IS-95 baseband simulation for 1 data channel of 9.6 KBps rate. The simulation is written for static channel and AWGN noise. The packet include: 1) Packet Builder (Viterbi Encoding, Interleaver, PN generation) 2) Modulator (RRC filter) 3) Demodulator (Matched Filter, RAKE receiver) 4) Receiver (HD or SD) (Deinterleaver, Viterbi Decoder). You should run "Simulation.m" function that include all modules.
標簽： simulation baseband channel packet
上傳時間： 2013-12-23
上傳用戶：zhangyigenius
自己編寫的超寬帶系統簡單仿真平臺，有簡單界面.包括可替換的脈沖成型（半余弦脈沖）、IEEE802.15.3a的修正SV信道、最大似然信道估計、Rake接收機等模塊，可以實現monte carlo仿真求誤碼率。可添加多址接入、編碼等功能（維特比編解碼、幀同步的程序由本人同學編寫）。入口主程序uwbsim.m 編解碼程序：bin2deci.m；bini2deci.m；deci2bin.m VITRBI.m 信道及信道估計：ch_est.m；channel.m；channelgenerator.m；conv_m. m；sigfold.m UWB_SV_channel.m uwb_sv_cnvrt_ct.m uwb_sv_eval_ct.m uwb_sv_model_ct.m uwb_sv_params.m Rake接收機：findpeak.m；MRC_combine.m；MRC_Rake.m；n_upsample.m；selectpath.m 其他：cnv_encd.m；dssignal.m；Eb_halfcos.m；waveshape.m；halfcos_generator.m；metric.m；nxt_stat.m；sim_main.m；spreadgren.m；test_code.m；training_ds.m；uwbsim.m；vit_test.m
上傳時間： 2013-12-15
上傳用戶：redmoons
本文介紹了一種基于復合右/左手（composite right/left-handed，CRLH）超材料的新型高增益的有源漏波天線(leaky-wave antenna，LWA)。這種天線工作在邊射，由無源CRLH漏波部分與放大器相互連接,重新組成一種在輻射過程中逐步增大功率泄漏的結構,從而提高天線的有效口徑進而提高其增益。通過放大器的準單向特性而導致的匹配再生功能,增益還可以進一步得到提高。
標簽： left-handed composite right
上傳時間： 2015-10-25
上傳用戶：netwolf
cdma2000的上行鏈路的仿真，包括編碼，發送，信道，解碼，rake接收等功能，完全是matlab仿真。
上傳時間： 2015-10-31
上傳用戶：caozhizhi
：首先介紹了DS--UWB系統的的發射與接收模型，然后分析了利用滑動相關法對信道進行估訃，并巾此給出 了不同RAKE接收機RAKE合成權系數選取方案。對接收機采用最大比(MRC)、最小均方誤差(MM SE)及帶均衡 器的(MRC)合并系數選取的誤碼性能進行了仿真和對比。結果表明了帶均衡器的MRC—RAKE只用較少的分支 就可以達到接收性能明顯優于MMSE—RAKE的程度。尤其在信噪比比較大時。這種優勢更加明顯。
上傳時間： 2016-01-25
上傳用戶：stvnash
