tory burch outlet 3 @-w-cdma spread spectrum syste

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3 @-W-CDMA spread spectrum system with spreading code structure


But with less storage resources has been more widely used. Which use the hardware circuit (such as feedback shift register) to generate real-time spreading code. As the logical structure is simple, easy to implement,tory burch outlet, real time characteristics have been adopted by most designers. X, turn on page 34 [3O 2000 Radio Works, Volume 8 J-3i a main tunnel column ML-~ tlfnn column n the main tunnel system to each sub-carrier frequency of the signal sequence b. Part time domain response with the modulation method is similar to the modulation introduced the correlation between symbols, while the transmitted signal constellation points has increased for example, BPSK signals, non-encrypted before transmission signal + lI, by P (D) = 0-D) encoded transmission signal is +2,0, -2. Memory shown in Figure 6 CIR (dB] offset / 5 sub-carrier spacing store using IC [since removed to improve the situation of the East system cIR partial collar 5 / 6 sub-set wrinkles interval map associated with the frequency domain after CIREC good glass of code method the applied P ∞): O-D) encoded cIR related changes. OFDM-related applications will be coded so that the system frequency-domain signal CIR several dB improvement. While the system spectral efficiency does not decrease because of the associated coding 4 Conclusion - 'EOFDM system between the sub-carrier frequency coding can effectively reduce the lead sub-carrier frequency offset caused by the frequency of inter-interference. When the L: 2 or 3, the system increases, respectively CIR l5 and 3O dB frequency-related coding method can not reduce the spectrum efficiency of the system under the premise of reducing the frequency interference. For the correlation length of L = 2,3,4 system CIR increased 3.5 db, 5 dB and 6 db. In addition, this frequency domain coding much simpler than the equilibrium method. References [i] MAiardandRLassaiIe. PrinciPiesofmoduIationandchanne [codingfordigita [br0adc Ⅱ stingformobi1ereceivers, EBllReview,tory burch outlet, technicaI. I987; (224): I68i90 [2] YupingZhaoandS-GH? Ggman. SensitivitytoDopple1, ShiftandCarrie1-FrequencvErro1, sinOFDMSystems-TheCons @ qusncesandSolutions. inProc. IEEEVehicuIarTech-DO1ogyConference (VTC96) 1996:1564-i568 [3] YupingZhao,]-DLeclercqandS-8. g? ggman. IntercarrierInterferenceCompressionInOFDMCommunica tionSystemyUsingCorre1RtiV6Coding. IEEECommun. Letters. Vo12Aug. 199g (2) :214-216 women from Vicky in 1983 and 1986,tory burch outlet, Northern Jiaotong University were awarded a bachelor's degree through the control system and a master's degree. 1997 and 1999 in Helsinki, Finland University of wireless professionals were awarded the Ph.D. and Doctor of Science degree deputy. Now at Department of Electronics,mac cosmetics wholesale, Peking University associate professor rank. _ On the next page 31 References Ei] PhysicalChannelsandMappingofTrsnsportChannelsontoP hysicalChannels (FDD) 3GTS25211V3.20 (2000-03] [2] SpreadingandModularion (FDD) 3GTS25.213V3.20 (2000 ~ 13) 1976 Bo Cheng was born in 1998 in the PLA Information Engineering College of Communication Engineering, bachelor degree, now the PLA Information Engineering University graduate research for the W-CDMA mobile communication technology. Juan was born in 1973, 1994, at the Institute of Communication Engineering, PLA Information Engineering was 3 - a bachelor's degree, now the PLA Information Engineering University graduate. research interests include mobile communications w-CDMA technology. a B4 one (2oooRadioEngineeringvoL30
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