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In order to obtain high spectral efficiency and high-rate packet transmission, this paper has proposed a STBC-OFDM system to solve the problem of Multi-fading Channels for wideband wireless communication system. Considering the Frequency Selective Channels (FSC), the paper gives the many simulation results of BER based on SNR when the system adopted different number of receiving and transmitting antennas,...
This paper presents a reasonable program that use orthogonal frequency division multiplexing(OFDM) technology to reduce inter-symbol interference (ISI) to improve the performance of space-time coding (STC) under frequency selective fading channel. Analyze the STC-OFDM system under the combination of STC and OFDM technology based on IEEE802.11a wireless standards.Monte Carlo method is adopted in simulation...
In this paper, to compensate frequency offset and phase noise influence, several ICI self-cancellation methods are proposed, CPE, ICI and CIR are derived in MISO OFDM system. As results, by choosing several ICI self-cancellation methods appropriately, considerable performance improvement can be achieved in the MISO OFDM system which affected by frequency offset and phase noise.
The researches about conditions of the resource allocation algorithm in wireless communication have been done a lot recently. An evaluation model for the adaptive algorithm of MIMO-OFDM system is built in this paper. After formulating system efficiency under static and adaptive conditions, the effect of imperfect channel state information (CSI) to MIMO-OFDM system is analyzed. Analytical and numerical...
In this paper, frequency offset and phase noise influence and its compensation technique are discussed in the DFT-spread OFDM system. Simulation results show that DFT-spread OFDM introduces more interference than OFDM because of DFT spreading phase offset mismatch caused by frequency offset and random phase noise. Data conjugate ICI self-cancellation method is suggested to improve system performance.
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