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This paper presents a Sorted QR-Decomposition (SQRD) processor for 3GPP LTE-A system. It achieves energy-efficiency by co-optimizing techniques, such as heterogeneous processing, reconfigurable architecture, and dual-supply voltage operation. At algorithm level, a low-complexity hybrid decomposition scheme is adopted, which switches, depending on the energy distribution of spatial channels, between...
This paper describes a hardware efficient linear precoder for Massive MIMO Base Stations (BSs) comprising a very large number of antennas, say, in the order of 100s, serving multiple users simultaneously. To avoid hardware demanding direct matrix inversions required for the Zero-Forcing (ZF) precoder, we use low complexity Neumann series based approximations. Furthermore, we propose a method to speed-up...
This paper presents a high-speed QR decomposition (QRD) processor targeting the carrier-aggregated 4×4 Long Term Evolution-Advanced (LTE-A) receiver. The processor provides robustness in spatially correlated channels with reduced complexity by using modifications to the Householder transform, such as decomposing-target redefinition and matrix real-valued decomposition. In terms of hardware design,...
In this paper, we focus on the Dual-Carrier modulation (DCM) technology in the Ultra Wide Band (UWB) wireless communication system. A new demodulation algorithm-getting fully usage of frequency diversity in the UWB channel is proposed. System simulator result shows that the proposed method can get 1.5dB gain at the Per (Packet error) performance of 8% while the data rate is 480Mbps under IEEE CM1...
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