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- W2564857314 abstract "OFDM is becoming widely applied in wireless communications systems due to its high rate transmission capability with high bandwidth efficiency and its robustness with regard to multi-path fading and delay. The use of differential phase-shift keying (DPSK) in OFDM systems avoids need to track a time varying channel; however, it limits the number of bits per symbol and results in a 3 dB loss in signal-to-noise ratio (SNR). Coherent modulation allows arbitrary signal constellations, but efficient channel estimation strategies are required for coherent detection and decoding. Orthogonal frequency division multiplexing (OFDM) provides an effective and low complexity means of eliminating inter symbol interference for transmission over frequency selective fading channels. This technique has received a lot of interest in mobile communication research as the radio channel is usually frequency selective and time variant. Wireless systems are expected to require high data rates with low delay and low bit-error-rate (BER). In such situations, the performance of wireless communication systems is mainly governed by the wireless channel environment. In addition, high data rate transmission and high mobility of transmitters or receivers usually result in frequency-selective and time- selective, i.e., doubly selective, fading channels for future mobile broadband wireless systems. On focusing the simple inter carrier interference (ICI) suppression that linearly combines the inter symbol interference (ISI)-free part of a cyclic prefix (CP) and its corresponding part in an orthogonal frequency-division multiplexing (OFDM) signal to soothe the ICI effect caused by a time varying channel." @default.
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- W2564857314 date "2015-01-01" @default.
- W2564857314 modified "2023-09-27" @default.
- W2564857314 title "SYSTEMATIC ANALYSIS OF AN OFDM SYSTEM" @default.
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