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Advanced Trends in Wireless Communications by M. Khatib

By M. Khatib

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For any wireless system design, the selection of a modulation and coding scheme is a main consideration and has a large impact on the system complexity. Problems such as power amplifier (PA) non-linearity, oscillator phase noise, insertion loss and flatness are more important for these RF circuits. These effects should be taken into account in the overall communication system. It was shown in (U. H. , 2008) that single carrier (SC) transmission has a lower tolerance to phase noise and is more resistant to the PA nonlinearity than the multicarrier OFDM.

As one can observe in Fig. 4, the comparison of the 28 Advanced Trends in Wireless Communications power distribution in the environment, obtained with GBT and X-Siradif, is very satisfying. More details are given in (S. , 2004). 3. ) communication system operating at near gigabit throughput has been developed at IETR. The realized system is shown in Fig. 5. Fig. 5. Wireless Gigabit Ethernet at 60 GHz realized by the IETR Fig. 6. Frame structure: a) 32-bits preamble; b) 64-bits preamble This system covers 2 GHz available bandwidth.

A trade-off between Pm and Pf gives the threshold to be used. A false alarm is declared when the same Ck correlators in each bank of correlators detect the presence of the preamble within the scrambled data (D1 and D2). Fig. 13. The preamble detection and byte synchronization The frame acquisition performance of the proposed 64 bits preamble was evaluated by simulations and compared to that of the 32 bits preamble (L. , 2009). The frame structure with 32 bits preamble uses only a data word of 256 bytes (255 bytes + a “dummy byte”).

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