This document provides updates to IEEE Std 802.16's MIB for the MAC, PHY and asso- ciated management procedures in order to accommodate recent extensions to the standard.

IEEE Standard for Local and Metropolitan Area Networks Part 16: Air Interface for Fixed Broadband Wireless Access Systems Draft Amendment: Management Information Base Extensions

The authors describe a novel systolic array which can efficiently compute the minimum variance distortionless response (MVDR) from an array of antenna receiver elements in a rapidly changing signal environment. The MVDR beamforming problem amounts to minimising, in a least squares sense, the combined output from an antenna array subject to K independent linear equality constraints each of which corresponds to a chosen 'look direction' The constraints are independent in the sense that, for each new vector of received data samples, it is necessary to compute the minimum array output subject to each constraint in turn. This involves the solution of K independent, but closely related, least squares minimisation problems.

http://ieeexplore.ieee.org/iel3/1842/4835/00190331.pdf

A systolic array processor for MVDR beamforming

Space-time block coding (STBC) orthogonal frequency division multiplexing (OFDM) is known to improve the reliability of broadband communication over wireless links. However, this technique suffers from a performance loss when the multiple-input multiple-output (MIMO) channel is correlated. This study addresses this problem. A STBC-OFDM system is proposed that is based on convolution that is skew-circular, rather than circular. This skew-circular convolution leads to one additional degree of freedom. The additional parameter can be optimised leading to improved performance for MIMO channels that are correlated. The skew-circular convolution is achieved via the introduction of a generalised prefix. The simulation results are given, illustrating the performance improvement of the proposed STBC-OFDM system. Furthermore, the proposed system is shown to be robust when channel state information is known not precisely, but imperfectly.

https://ietresearch.onlinelibrary.wiley.com/doi/pdf/10.1049/iet-com.2013.1166

Generalised prefix for space–time block-coded orthogonal frequency division multiplexing wireless systems over correlated multiple-input multiple-output channels

1Department of Electrical Engineering, National Cheng Kung University, Tainan 600, Taiwan 2Department of Electrical Engineering, National Chung Hsing University, Taichung 40227, Taiwan 3Department of Information and Communication Engineering, Inha University, Inncheon, Republic of Korea 4 School of Electrical & Electronic Engineering, Nanyang Technological University, Singapore 5Department of Electrical & Computer Engineering, Lehigh University, Bethlehem, PA 18015, USA

https://downloads.hindawi.com/journals/jece/2012/687172.pdf

Zhiyuan Yan

Papers

Implementations of signal-processing algorithms for OFDM systems