Evolution of Cellular System Sample Clauses

Evolution of Cellular System. ‌ By fully utilizing static frequency planning or code-division multiple access (CDMA) techniques in the traditional cellular systems, inter-cell interference (ICI) can be evaded. Therefore, cooperative processing is not demanded in the traditional first, second and third generation (1G, 2G, 3G) of the cellular radio access networks (RANs) as presented in Figure 2.1. However, in the fourth generation (4G) of the cellular systems, which is based on the orthogonal frequency-division multiplexing (OFDM) technique, the ICI becomes severe due to the spectrum reuse in adjacent cells. Thus, cooperative processing is needed.
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