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In this paper, a novel control generation methodology based on the Polytope Model is proposed for the QR decomposition problem mapped onto systolic array processors. Many FPGA accelerator implementations for QR decomposition based on array of processors have been studied. However, the design of the control path is one of the greatest challenges in the design of complex signal processing applications...
Hybrid MIMO communication systems combine spatial multiplexing with diversity gain to achieve both high spectral efficiency and link reliability. We present a novel generalized hybrid scheme that allows the use of any number of spatial multiplexing layers (V-BLAST) and any number of quasi-orthogonal layers (ABBA).We also present a low-complexity, ordered, successive interference cancellation receiver...
In this paper we propose a new architecture for detection of hybrid layered space-time block codes (LSTBC). The proposed receiver is based on a successive interference cancellation (SIC) scheme and the QR decomposition, which leads to a suitable hardware implementation. It was designed for zero-forcing (ZF) criterion; reduced complexity is achieved by means of an adequate rearrangement of the channel...
A new architecture for detection of linear dispersion space-time codes (LDSTBC) over Rayleigh fading channels is presented. The LDSTBC scheme consists of one Alamouti space-time block code unit, plus two more antennas operating as two layers of V-BLAST in the transmitter. The LDSTBC receiver can operate with three or more antennas simultaneously. The proposed receiver is based on an ordered successive...
A new architecture for detection of layered quasi-orthogonal space-time block codes (LQOSTBC) with receiver antenna selection over Rayleigh fading channels is presented. The LQOSTBC transmitter consists of a full-rate quasi-orthogonal space-time block code unit, plus one antenna operating as V-BLAST. The LQOSTBC receiver selects nR out of a total of NR available antennas using a low-complexity, nearly...
This paper describes the behavior of two popular thin-QR decomposition algorithms when implemented using fixed-point arithmetic. This behavior is studied in the context of a V-BLAST receiver, and the effects of the limited precision are evaluated in terms of their impact on the receiver's bit error rate. Our analysis of V-BLAST under these conditions shows a strong dependence on the numerical precision,...
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