作者: Hisham A. Mahmoud
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摘要: With the increasing advancements in digital technology, future wireless systems are promising to support higher data rates, mobile speeds, and wider coverage areas, among other features. While further technological developments allow computational complexity, lower power consumption, employ larger memory units, resources remain limited. One such resource, which is of great importance systems, available spectrum for radio communications. To be able high rate applications, there a need bandwidths spectrum. Since cannot expanded, studies have been concerned with fully utilizing approach achieve this goal reuse through space, time, frequency, code multiplexing techniques. Another optimize transceiver design as highest throughput over used From physical layer perspective, highly flexible efficient modulation technique carry communication signal. A multicarrier known orthogonal frequency division (OFDM) one example technique. OFDM has number current standards fidelity (WiFi) worldwide interoperability microwave access (WiMAX) by Institute Electrical Electronics Engineers (IEEE), proposed 4G technologies long term evolution (LTE) LTE-advanced 3rd Generation Partnership Project (3GPP), world initiative new (WINNER) standard Information society (IST). This due OFDM’s spectral efficiency, resistance narrow band interference, adaptivity, scalability.