3G Basic Parameter

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Basic Parameters of WCDMA
Frequency Band                                     :           2100 MHz
1920-1980MHz (UL) &2110-2170 MHz (DL)
Duplex Space                                         :           190 MHz
Channel bandwidth                                 :           5 MHz
Coding Spacing                                      :           200 KHz (RASTER)
UARFCN Range                                       :           10562-10838 (Total ARFCN – 276)
Duplex mode                                          :           FDD and TDD
Downlink RF channel structure                 :           Direct spread
Chip rate& Chips                                    :           3.84 Mcps& It is pulse of spreading spectrum n 
                                                                        It’s in rectangular shape of +1 & -1
Frame length                                         :           10 ms (38400 chips) = 15Slots, & 1slot = 2650chips
Superframe                                           :           A Superframe has a duration of 720ms and consists
                                                                        Of 72 radio frames. The super frame boundaries are
Defined by the System Frame Number (SFN)
Spreading modulation                             :           Balanced QPSK (downlink)
Dual-channel QPSK (uplink)
Complex spreading circuit
Data modulation                                   :           QPSK (downlink) & BPSK (uplink)
Channel coding                                     :           Convolution (Voice) and turbo (data) codes
Coherent detection                               :           User dedicated time multiplexed pilot (DL and UL), 
Common pilot in the downlink
Channel multiplexing in downlink            :           Data and control channels time multiplexed
Channel multiplexing in uplink                :           Control and pilot channel time multiplexed
I&Q multiplexing for data and control channel
Spreading factors                                  :           4–256 (uplink), 4–512 (uplink)
Power control                                        :           Open and fast closed loop (1.6 kHz)
Power control period                              :           1500Hz
Power control step size                          :           0.5, 1, 1.5 and 2db
Power control range
Handover                                              :           Soft HO, softer HO, Inter frequency and IRAT HO

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