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Antenna Terminology


This tutorial section on WCDMA (UMTS) basics covers following sub topics:
UMTS Tutorial  UMTS channels  measurements  PHY layer  TDD vs FDD PHY  RRC States  Security  Cell search  Bands  UARFCN  Frame 


This page on WCDMA terminology describes terms related to WCDMA. It covers what is CDMA, WCDMA frame, WCDMA bands, TD-SCDMA, WCDMA router, UMTS, UARFCN, PN code, walsh code, spreading, WCDMA stack, HSDPA, HSUPA, UTRA, eNB etc.

WCDMA Terms Basic description RF Wireless World Reference
CDMA Code Division Multiple Access, the technique by which different users can use the time and frequency resource at the same time for communication purpose. All the users are allocated different unique codes to help avoid collision and retrieve their information. What is CDMA
WCDMA frame The frame structure defining various time intervals used for communication between eNB and UE. UMTS Frame Structure
WCDMA bands The frequency ranges used in WCDMA system by UEs and eNBs for communication. WCDMA bands
TD-SCDMA Time Division Synchronous Code Division Multiple Access, 3G standard used in china. It supports UMTS-TDD 1.28 Mcps frame structure. TD-SCDMA basics
WCDMA router The device which allows WCDMA compliant UE to use the WCDMA network service.
UMTS stands for Universal Mobile Telecommunications System UMTS basic tutorial
UARFCN UTRA Absolute Radio Frequency Channel Number UARFCN concepts
PN code pseudo noise code, the unique PN codes are assigned to eNB in CDMA system. PN code properties
Walsh code Walsh code is the example of spreading code used in CDMA. The unique walse codes are assigned to the UEs. walsh code basics
Spreading Spreading refers to increase of the signal bandwidth. In CDMA, low bit rate information signal is multiplied with high bit rate PN codes to achieve this. spreading vs scrambling
WCDMA stack The set of rules for communication between UE and eNB as well as within the protocol layers of UE and eNB itself. WCDMA protocol stack
HSDPA High-Speed Downlink Packet Access HSDPA
HSUPA High-Speed Uplink Packet Access HSUPA
UTRA UMTS Terrestrial Radio Access
eNB evolved Node B, base station in CDMA is referred by this name.

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RF and Wireless Terminologies


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