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As a combination of OFDM with space-time coding technique, MIMO-OFDM has recently received considerable attentions, which can not only effectively enhance the transmission rate and capacity of the wireless communication system but also effectively combat multi-path fading and interfere. This paper discusses the two-dimensional pilot-based channel estimation method in MIMO-OFDM system, and the principle...
Fast and reliable channel estimation is very important for wireless communication transmission. A novel One-Cycle blind channel estimation algorithm based on cyclostationarity properties of OFDM signal is proposed in this paper. Without changing cycle frequency, the new algorithm is formed from using the two related z-transform values of delay parameter. Furthermore, a simplified algorithm based on...
In this paper, we consider channel sounding for multi-sector cooperative beamforming in orthogonal frequency division multiplexing-based wireless cellular systems. The use of conventional sounding schemes may suffer from interference from other sectors and also require large signaling overhead. To reduce the sounding interference near the sector boundary as well as the signaling overhead, we allocate...
In this paper, we consider a new channel probing scheme for opportunistic scheduling in the uplink of orthogonal frequency division multiplexing (OFDM)-based wireless systems. To reduce signaling overhead for the probing, we consider a two-step channel probing process; called pre-probing and mainprobing. Good subchannels are first estimated through the pre-probing process using a probing signal transmitted...
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