RAKE receiver for direct-sequence spread spectrum systems Simulink model of a simple direct-sequence spread spectrum system with RAKE reception
標簽: direct-sequence direct-sequenc receiver Simulink
上傳時間: 2014-01-05
上傳用戶:lunshaomo
Rake receiver of CDMA
上傳時間: 2015-08-21
上傳用戶:agent
rake接收機(rake-receiver)
標簽: rake-receiver rake 接收機
上傳時間: 2013-12-04
上傳用戶:sz_hjbf
RAKE receiver for DS-SS systems.mdl DS-CDMA的Rake接收機的Simulink仿真文件
標簽: receiver Simulink DS-CDMA systems
上傳時間: 2016-07-04
上傳用戶:aa54
Simulation DS-SS Rake Receiver
標簽: Simulation Receiver DS-SS Rake
上傳時間: 2013-12-22
上傳用戶:Breathe0125
RAKE receiver for DS-SS systems - rev1.0
標簽: receiver systems DS-SS RAKE
上傳時間: 2017-05-17
上傳用戶:lepoke
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
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
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).
標簽: simulation baseband channel packet
上傳時間: 2014-12-20
上傳用戶:ukuk
由于移動環(huán)境的復雜性,無線信號在發(fā)送傳輸和接收過程中有很明顯的衰落現(xiàn)象,特別是在高頻無線通信中,多徑衰落或頻率選擇性衰落對無線信號的干擾最為嚴重。通過分集接收技術(shù),Rake接收機在CDMA移動通信系統(tǒng)中抗多徑衰落效果尤為明顯。作為一種新穎的多址接入方式,多載波CDMA充分利用了OFDM最優(yōu)頻率利用率以及CDMA的多址和頻率分集,且系統(tǒng)容量和抗符號間干擾性能明顯優(yōu)于傳統(tǒng)的單載波CDMA。這些特性使得多載波CDMA成為未來的寬帶無線通信系統(tǒng)最有希望的候選。 @@ 本文研究了一種多載波擴頻通信系統(tǒng),介紹了其Rake接收機工作原理和設(shè)計思想,進行了理論仿真并用FPGA予以實現(xiàn)。 @@ 本文首先介紹了移動通信系統(tǒng)的發(fā)展歷史以及OFDM和CDMA技術(shù)原理,并描述了OFDM和CDMA結(jié)合的三種系統(tǒng)(MC-DS-CDMA、MT-CDMA、MC-CDMA)的原理和系統(tǒng)模型;接著,介紹了目前影響移動通信的主要衰落以及Rake接收機基本原理及其作用。多徑信號的每路信號都可能含有可以利用的信息,Rake接收機就是通過多個相關(guān)接收器接收多徑信號中各路信號,通過信道估計和信道補償消去信道因子的附加相位,并把他們合并在一起,以此來改善信號的信噪比和系統(tǒng)的可靠性;在此基礎(chǔ)上,論文提出了一種多載波擴頻通信系統(tǒng)的實現(xiàn)方案,并詳細介紹了其Rake接收機實現(xiàn)原理,給出了最大比合并時各種分徑數(shù)目下系統(tǒng)誤碼率的仿真圖;最后介紹了此方案中Rake接收機的FPGA硬件實現(xiàn)設(shè)計方案及其系統(tǒng) 測試結(jié)果。@@ 仿真結(jié)果顯示出隨著分集徑數(shù)的增加,系統(tǒng)的誤碼率顯著降低。表明Rake接收機抗多徑衰落效果顯著,且在多載波CDMA系統(tǒng)中其分集效果更好,實現(xiàn)相對簡單。最終Rake接收機的FPGA實現(xiàn)結(jié)果同理論仿真一致,時序通過,資源耗費不大,具有較大的實用價值。 @@關(guān)鍵詞:多載波擴頻通信,CDMA,Rake接收機,F(xiàn)PGA
上傳時間: 2013-07-25
上傳用戶:axxsa
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