The document discusses and compares key technologies and concepts between WCDMA and GSM mobile networks. It summarizes the main differences between the two standards, including carrier spacing, frequency reuse factor, power control frequency, quality control mechanisms, network planning approaches, and more. It also covers packet data capabilities and differences in downlink transmit diversity support between the two standards.

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Carrier spacing 5 MHz 200 kHz
Frequency reuse factor 1 1–18
Power control
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Quality control Radio resource
management algorithms
Network planning
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multipath diversity with
Rake receiver
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Packet data Load-based packet
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Channelisation code Scrambling code
Usage Uplink: Separation of physical data
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cell
Uplink: Separation of mobile
Downlink: Separation of sectors (cells)
Length 4–256 chips (1.0–66.7 µs)
Downlink also 512 chips
Different bit rates by changing the length
of the code
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66.7 µs = 256 chips
Option (2) can be used with advanced
base station receivers
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Number of codes Number of codes under one scrambling
code = spreading factor
Uplink: 16.8 million
Downlink: 512
Code family Orthogonal Variable Spreading Factor Long 10 ms code: Gold code
Short code: Extended S(2) code family
Spreading Yes, increases transmission bandwidth No, does not affect transmission
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