In this paper, we study a generalized Kalman--Bucy filtering problem under uncertainty. The drift uncertainty for both signal process and observation is considered, the attitude to characterized by convex operator (convex risk measure). optimal filter or minimum mean square estimator (MMSE) calculated solving estimation operator. first part of studied $g$-expectation which special For case, pro...

In this letter, we investigate the joint receiver design for integrated sensing and communication (ISAC) systems, where signal target echo are simultaneously received processed to achieve a balanced performance between both functionalities. particular, proposed two schemes solve problem of receive processing. The first is based on maximum likelihood (ML) detection, minimum mean squared error (M...

In this modern wireless technology Multicarrier communication is one of the more suitable and reliable communication technique. Orthogonal Frequency Division Multiplexing (OFDM) is used as modulation technique in multicarrier communication. The present paper gives an overview of OFDM and the various Channel Estimation techniques used in OFDM. The results implemented in MATLAB gives the performa...

Channel estimation is crucial for massive massive multiple-input multiple-output (MIMO) systems to scale up multi-user (MU) MIMO, providing great improvement in spectral and energy efficiency. This paper presents a simple and practical channel estimator for multi-cell MU massive MIMO time division duplex (TDD) systems with pilot contamination in flat Rayleigh fading channels, i.e., the gains of...

The constrained MMSE (CMMSE) receiver, which has been developed for flat fading channels [6], is applied to each finger of a RAKE receiver in multipath fading environment. The optimal filter coefficients of the CMMSE receiver in steady state are derived. The results indicate that the performance of CMMSE receivers can be degraded by interpath interference (IPI) when the channel fade rate is slo...

This paper considers a single channel speech enhancement algorithm, which is based on our previous work on βorder minimum mean square error (MMSE) spectral estimation. We propose to make β a function of both local and frame signal-to-noise ratios (SNRs) in order to achieve more effective preservation of weak speech components. Moreover, by taking into account the speech-presence uncertainty in ...

This paper provides a survey among different types of channel estimation schemes for MC-CDMA. This paper reviews all possible channel estimation schemes for MC-CDMA and compares all schemes on the basis of performance and requirements. It is observed that each of the estimation technique has its own advantages and disadvantages. Some of the techniques have advantage of low complexity but on the...

Performance analysis of a minimum mean-square error (mmse) estimator for the output signal from a composite source model (CSM), which has been degraded by statistically independent additive noise, is performed for a wide class of discrete as well as continuous time models. The noise in the discrete time case is assumed to be generated by another CSM. For the continuous time case only Gaussian w...