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The issue of binary data detection under subsampling condition is addressed in this work. Through convex relaxation, the original combinatorial optimization problem is transformed to an ℓ∞ minimization problem which can be efficiently solved by ℓp approximation algorithm with sufficiently large p. Theoretical analysis and simulations indicate that when the number of sampled signals is around half...
This paper presents a link adaptive processor to perform low-complexity channel estimation and QR decomposition (QRD) in Long Term Evolution-Advanced (LTE-A) receivers. The processor utilizes frequency domain correlation of the propagation channel to adaptively avoid unnecessary computations in the received signal processing, achieving significant complexity reduction with negligible performance loss...
This paper presents a cost-efficient soft-output signal detector design solution targeting on the spatial-multiplexing MIMO system. The detector achieves low hardware cost and near-optimal detection performance based on the modification to the fixed-complexity sphere decoder (FSD) using several implementation-oriented algorithm-level improvements, which are early-pruning with polygon-shaped constraint,...
In synchronous DS-CDMA systems, multi-access interference (MAI) due to severe frequency-selective fading degrades the system performance. Based on the frequency domain oversampling (FDO) and minimum mean-square error (MMSE) principle, a novel linear per-user MMSE detector is proposed to approximately restore the orthogonality among the spreading sequences and suppress the MAI. Based on a discussion...
We experimentally demonstrate the mitigation of intra-channel nonlinearities in 10GBaud coherent quadrature phase shift keying systems via nonlinear electrical equalizer based on Volterra theory. The performance of nonlinear transmission systems is significantly improved.
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