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In high-speed mobile OFDM communication systems, the receiving characteristics are degraded bably by channel time variation. Our solution is to rotate a circular array antenna so as to decrease the speed of the receiving antenna relative to the ground. Moreover, the BER characteristics with the parameters of ISBD-T, which are a standard of Japanese digital terrestrial television broadcasting, were...
The integer frequency offset (IFO) is typically estimated in the frequency domain using a differentially encoded training sequence. This paper proposes IFO estimation method for IEEE 802.15.4g Smart Utility Networks (SUN) applications of MR-OFDM PHY. This IFO estimation method uses the transmitted pilot at each multiple of subcarrier spacing which is used to measure the fractional frequency offset...
Bit rates in flat-fading OFDM wireless systems can be improved through the use of Adaptive Modulation and Coding (AMC). In this paper, we propose two practical, efficient link adaptation algorithms that use fixed link tables defined by SNR ranges for supported spectral efficiencies. The purpose is to design non-iterative algorithms with acceptable performance and reduced computational complexity relative...
Major drawback in orthogonal frequency division multiplexing (OFDM) systems is that the transmit signal exhibits high peak-to-average power ratio (PAPR). In this paper, a phase sequence blind estimation method is presented for PAPR reduction based on a selected mapping (SLM) or a partial transmit sequence (PTS) in multi-input multi-output (MIMO) coded OFDM systems, where low density parity check (LDPC)...
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