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This paper treats the digital design of a probabilistic energy equalizer for impulse radio (IR) UWB receiver in high data rate (100 Mbps). The aim of this study is to bypass certain complex mathematical function as a chi-squared distribution and reduce the computational complexity of the equalizer for a low cost hardware implementation. As in Sub-MAP algorithm, the max* operation is investigated for...
Promising results obtained for a simplified 1-optimum local search multiuser detection (1-opt s-LS-MUD), are extended in this paper to a new scenario, considering quadrature phase shift keying (QPSK) modulation and single/multiple-input multiple-output (S/MIMO) in a multi-carrier code division multiple access (MC-CDMA) system. Furthermore, so as to avoid the complex-valued computation in QPSK formats,...
It is well known that the maximum-likelihood (ML) detection for multiple-input-multiple-output (MIMO) systems requires high computational complexity. As a result, many suboptimal algorithms, achieving a tradeoff between computational complexity and performance, have been proposed. Among these algorithms, the sphere decoding (SD) detector is considered as a very efficient solution. However, the throughput...
For multi-user multiple-input multiple-output (MIMO) downlink channels, the base station (BS) requires all channel state information (CSI) to select the best user set to achieve multiuser diversity gain. Unfortunately, CSI at the BS have to be fed back from all users for most of systems, especially for the frequency division duplexed (FDD) systems, which imposes a heavy and demanding burden on the...
Large scale adaptive beamformers for monopulse radars are difficult to implement on distributed FPGA arrays due to their computational complexity and/or data bandwidth requirements between FPGA processors. In monopulse target estimation, a 2D antenna array of 64 elements is employed for horizontal and vertical polarizations. For such a system sum and difference beamformers are required to estimate...
The H.264/AVC uses the rate distortion optimization (RDO) method as a measure to select the optimal coding mode. However, the computational complexity for RDO calculation is increased due to the various coding modes. In this paper, we analyzes that the best mode decision for 4 times 4 intra-prediction can be affected according to the relation of most probable mode (MPM) and prediction mode. With this...
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