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An accurate estimate of the channel frequency response (CFR) needed for OFDM equalisation can be obtained using the linear minimum mean square error (MMSE) algorithm. However, for an optimal operation such an estimator requires real-time inversion of the CFR correlation matrix that is found to be impractical due to considerable increase of the receiver's(More)
Spatially multiplexed multiple-input-multiple-output orthogonal frequency division multiplexing (SM-MIMO-OFDM) systems are expected to provide a considerable increase of transmission capacity paving the way for the next generation broadband wireless communication standards. Considered MIMO-OFDM receiver performs estimation of the channel state information(More)
The deployment of pricing schemes for communication services is driven by the network technologies. QoS is a major factor that affects the choice of a pricing scheme for a given network. In this paper, we explore a pricing scheme that uses service profiles, which define the QoS received from accessing a common resource pool. Through resource sharing between(More)
MIMO-OFDM systems operating in the wireless doubly-selective channels rely on the pilot-assisted transmissions to acquire channel state information. Application of the two-dimensional filtering algorithms to channel estimation in the MIMO configurations is challenging due to the complexity considerations. Furthermore, different pilot structures employed in(More)
—One of the serious challenges, which hamper application of multiple-input multiple-output (MIMO) multicarrier (MC) transmission systems in the cognitive radio (CR) environments, is the synthesis of reliable pilot signals, which can be used for the CR channel sounding. This paper addresses design of the optimal pilot pattern for MIMO-MC CRs. The principal(More)
– This work investigates the performance of linear detector based receivers in MIMO OFDM systems. Two linear detectors are compared that is: Zero Forcing (ZF) and the Minimum Mean Square Error (MMSE). The introduction of interference cancellation will be shown to greatly improve linear detector Bit Error Rates (BER). The performance of one successive(More)
In this article the new modified order-recursive least squares (MORLS) algorithm is presented for the multipath channel response estimation in the OFDM systems. The developed algorithm exhibits noticeably better performance (up to 1.4 dB) than traditional DFT-based methods due to improved noise filtering if the channel is characterised by a sparse(More)
Article history: Available online xxxx Keywords: Minimum mean square error Multipath Multiple-input-multiple-output Pilot-to-data power ratio a b s t r a c t Multiple-input-multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) communication systems are currently being viewed as a main candidate for the next generation broadband wireless(More)
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