Work of Synchronization Channels P-SCH & SSCH in 3G WCDMA Synchronization Channel mainly Used for cell search its having Two sub channels: P-SCH and S-SCH, SCH is transmitted at the first 256 chips of every time slot. Primary synchronization code is transmitted repeatedly in each time slot. Secondary synchronization code specifies the scrambling code groups … Read more
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
PRACH Physical Random Access Channel work in WCDMA Carrying uplink signaling and data, consist of two parts: One or several preambles: 16 kinds of available preambles 10 or 20ms message part The Physical Random Access Channel (PRACH) is used by the UE to access the network and to carry small data packets. It carries the … Read more
A DAS contains the same active components present in a DAS passive, with the addition of active devices such as amplifiers, repeaters or amplifiers bidirectional (BDAS) to amplify and / or radio signals shipping. This enables an active DAS to cover a much larger area of a passive DAS. Active distribution systems, however, are more … Read more