Simulation of Third Generation CDMA Systems - Virginia Tech

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Figure 3.19: Main InterfaceThen the user can choose either the downlink or uplink simulator by pressing theappropriate buttons. Pressing the uplink button will cause the menu for the uplink simulatorto appear on the screen as shown in figure 3.20.Figure 3.20 Interface for Uplink SimulatorThe uplink simulator provides the user with various parameters describing the overallsystem design. The user can select the parameter E b /N 0 . This can be single value or an array.While giving the values to the simulator, MATLAB syntax has to be followed. Forparameters such as spreading factor, samples per chip, channel and number of rake fingersthere are pull-down menus that provide the user with the valid ranges or values for theparticular parameter. Although Raised Cosine pulse shaping is the standard, a pull-down50
menu is provided which gives the option for rectangular pulse shaping as well as RaisedCosine filtering. The number of interferers has to be typed in the corresponding text box. Thenumber of frame parameter determines how many frames the simulator will process beforegenerating an output. Each of these parameters has their default settings as shown in the nexttable:Table 3.2: Default Parameters for the Uplink SimulatorEb/N0 (dB) 5Spreading Factor 32Samples per Chip 1Pulse Shape Raised CosineChannelIndoorInterferer Number 0Rake Finger 4Number of Frame 1If the user chooses to run the downlink simulator, then downlink button needs to bepressed after typing in the command wcdma at the Matlab prompt. As far as the parametersare concerned, they have the similar significance as those in the uplink simulator. The onlychange in the default parameters is there are three fingers at the rake receiver unlike fourfingers at the uplink.After the simulation is complete, the simulator provides the user with the options ofobserving the results in either tabular or graphical form. For example, the user can select the’BER Plot ’ button to see the BER performance of the receiver or he can select the ’ DisplayBER ’ button to see a table of BER vs E b /N 0 . The final menu for the uplink is shown next.51
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Simulation of Third Generation CDMA
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AcknowledgmentsI would like to expr
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2.9.2. Transmit Diversity Schemes2.
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List of Tables1.1 3G Data Rate Requ
Page 9 and 10: 3.9 Implementation of Pulse shaping
Page 11 and 12: Chapter 1IntroductionThe goal for t
Page 13 and 14: 1.3 Third Generation Cellular Syste
Page 15 and 16: 1.4. WCDMA: Air Interface for 3GOne
Page 17 and 18: 1.4.2 WCDMA Key Technical Character
Page 19 and 20: Chapter 2WCDMA Physical LayerThis c
Page 21 and 22: Channelization Code(C D )cos(ω c t
Page 23 and 24: DataPilotTFCI FBI TPCT slot =2560 c
Page 25 and 26: 2.4 Uplink Spreading CodesThe sprea
Page 27 and 28: Figure 2.6: Auto-correlation for Tw
Page 29 and 30: The following block diagram shows t
Page 31 and 32: 0.180.160.140.12Probabilty Density0
Page 33 and 34: ar( 0) = 2vr( 0) + 1 (2.12)mod 4ar(
Page 35 and 36: 2.8 Channel CodingThe main purpose
Page 37 and 38: 2.9.2 Transmit Diversity SchemesTra
Page 39 and 40: These differences will become evide
Page 41 and 42: Dtoffset = 2 (3.15)cHere c is the v
Page 43 and 44: Each ray is split into two rays, on
Page 45 and 46: The pass-band of the pulse shaping
Page 47 and 48: The Rayleigh waveform is generated
Page 49 and 50: This expression can be used directl
Page 51 and 52: e -jϕ1FrameAlignmentResamplingDesc
Page 53 and 54: 3.2.7 BER CounterThe bit error rate
Page 55 and 56: (t)R i ’(t)R i (t)e -jϕ i C SC *
Page 57 and 58: IT+ τT + τi i i I iτ iτ iiiz =
Page 59: 3.3.2 MAI for DownlinkThe MAI in th
Page 63 and 64: up_sim.mpar_up.mat ovsf_gen.m scram
Page 65 and 66: 3.6 Code OptimizationThe simulator
Page 67 and 68: Chapter 4Simulation ResultsThis cha
Page 69 and 70: 10 0 E b/N 010 -1BER10 -210 -30 int
Page 71 and 72: 10 0 Number of Interfererssf=32sf=1
Page 73 and 74: 10 0 E b/N 00 interferer2 interfere
Page 75 and 76: 10 -1 Number of InterferersBER10 -2
Page 77 and 78: constraint length. So for a constra
Page 79 and 80: Table 4.1: Performance Improvement
Page 81 and 82: channel model based on measurement
Page 83 and 84: [7] Kevin Laird, Nick Whinnet, and
Page 85: VitaFakhrul Alam was born in Dhaka,
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