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
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
Main Work of Primary Common Pilot Channel (PCPICH) in WCDMA is as below. Carrying pre-defined sequence Fixed channel code: Cch, 256, 0, Fixed rate 30Kbps Scrambled by the primary scrambling code Broadcast over the entire cell A phase reference for SCH, Primary CCPCH, AICH, PICH and downlink DPCH, Only one PCPICH per cell The Common … Read more
The table shows representative Link Downlink budget for 3G. Fluctuations in the signal can be represented by a scale and small effects such models are typically used for external circulation. Indoor shadowing results in a large-scale signal change, which may be represented by a log-normal distribution in a manner similar to 3G macro propagation model … Read more