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In the equalization of frequency-selective multiple-input multiple-output (MIMO) channels it is usually assumed that the length of the channel impulse response (CIR), also referred to as the channel order, is known. However, this is not true in most practical situations and, in order to avoid the serious performance degradation that occurs when the CIR length is underestimated, a channel with "more...
Semi-blind channel estimation, as a combination method of blind channel estimation and training-based channel estimation, has an attractive improve on the performance of frequency spectrum efficiency. Enforcing the sparsity of channel impulse response as well as the constant modulus property of symbols, taking advantage of known training-based data, as well as unknown constant modulus symbols, an...
This paper addresses the problem on blindly estimating the channel impulse response (CIR) and the carrier frequency offset (CFO) in the uplink transmissions of multiuser code division multiple access system. Two blind subspace-based CIR and CFO estimation methods, namely, the exact determinant minimization method and the approximate determinant minimization method, are proposed. The performance of...
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