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In this paper, a linearly constrained constant modulus algorithm (LCCMA) based blind adaptive multi-user detection for DS-UWB system is presented in a realistic indoor channel. Based on gradient descent method, The key problem to minimizing the CMA cost function subject to multiple linear constraints is pre-selected or jointly updated. Theoretical analysis and simulation results show that, compared...
A pilot-aided scheme for the parameter estimation in Paired Carrier Multiple Access (PCMA) satellite communication systems is proposed in this paper. Recently, the asymmetric application mode of PCMA, which is more efficient and pragmatic than the symmetric mode, has been studied with great interest. In our research, carefully selected pilot sequences have been inserted into the frame in an attempt...
Block diagonalization (BD) is a low-complexity linear preceding scheme for multiuser MIMO (MU-MIMO) downlink, which can completely eliminate multi-user interference with perfect channel state information (CSI) at the transmitter. Under the assumption of block fading channels, BD with fixed amount of feedback is interference-limited. In this paper, we first introduce a low-complexity CSI feedback scheme,...
A proved affine projection algorithm (APA) is proposed for uplink asynchronous multicarrier code-division multiple-access (MC-CDMA) systems with multipath Rayleigh-fading channel. The proposed technique is totally blind, i.e., the channel estimation of desired user (the spreading code is known) is carried out by subspace separation, which doesn't need the rank estimation in the first step, then the...
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