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3G Spectrum Allocation

How 3G Spectrum Allocation? 3G Spectrum Allocation is different in different country but mainly its all having as per below figure. ITU has allocated 3G Spectrum Allocation 230 MHz frequency for the 3G mobile communication system IMT- 2000: 1885 ~ 2025MHz in the uplink and 2110~ 2200 MHz in the downlink. Of them, the frequency … Read more

Work of Acquisition Indicator Channel AICH in 3G

Here I write about what is main work of Acquisition Indicator Channel AICH in 3G There is 2 types main work of AICH Carrying the Acquisition Indicators (AI), SF = 256 There are 16 kinds of Signature to generate AI The Acquisition Indicator Channel (AICH) is a common downlink channel used to control the uplink … Read more

PRACH Message Structure and Access Timeslot Structure

Here I write about PRACH Message Structure and PRACH Access Timeslot Structure for WCDMA 3G with its Flow in Image. The data and control bits of the message part are processed in parallel. The SF of the data part can be 32, 64, 128 or 256 while the SF of the control part is always … Read more

What is work of Primary Common Control Physical Channel PCCPCH in 3G

Main work of Primary Common Control Physical Channel PCCPCH in 3G wcdma as below. Carrying BCH transport channel Fixed rate, fixed OVSF code (30kbps,Cch, 256, 1) The PCCPCH is not transmitted during the first 256 chips of each time slot The Primary Common Control Physical Channel (P-CCPCH) is a fixed rate (SF=256) downlink physical channel … Read more