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| Zdroj: |
Adaptive WCDMA; 2003 1st Edition, p23-42, 20p |
| Abstrakt: |
The article presents information about the pseudorandom sequences. A heuristic approach was used to define certain classes of codes and to discuss their basic properties. The theory in this field uses mathematical tools based on discrete algebra for precise treatment of these problems. Only those codes that are the basis for the construction of the codes used in the existing standards are covered in this chapter. In Universal Mobile Telecommunication System, Gold codes are used for scrambling. Using orthogonal variable spreading factor codes separates different channels of the same user on the uplink. A large set of Kasami codes is used in the primary and the secondary synchro channel. |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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