TAILIEUCHUNG - Báo cáo toán học: " MAC and baseband processors for RF-MIMO WLAN"

Tuyển tập các báo cáo nghiên cứu khoa học ngành toán học được đăng trên tạp chí toán học quốc tế đề tài: MAC and baseband processors for RF-MIMO WLAN | Stamenkovic et al. EURASIP Journal on Wireless Communications and Networking 2011 2011 207 http content 2011 1 207 EURASIP Journal on Wireless Communications and Networking a springeropen Journal RESEARCH Open Access MAC and baseband processors for RF-MIMO WLAN 1 112 2 2 Zoran Stamenkovic Klaus Tittelbach-Helmrich Milos Krstic Jesus Ibanez Victor Elvira and Ignacio Santamaria Abstract The article describes hardware solutions for the IEEE medium access control MAC layer and IEEE digital baseband in an RF-MIMO WLAN transceiver that performs the signal combining in the analogue domain. Architecture and implementation details of the MAC processor including a hardware accelerator and a 16-bit MAC-physical layer PHY interface are presented. The proposed hardware solution is tested and verified using a PHY link emulator. Architecture design implementation and test of a reconfigurable digital baseband processor are described too. Description includes the baseband algorithms the main blocks being MIMO channel estimation and Tx-Rx analogue beamforming their FPGA-based implementation baseband printed-circuit-board and real-time tests. Keywords baseband MAC MIMO processor 1. Introduction Current multiple-input multiple-output MIMO wireless systems perform the combining and processing of the complex antenna signal in the digital baseband. Since complete transmitter and receiver are required for each path the resulting power consumption and costs of the conventional MIMO approaches 1 limit applications for ubiquitous networks. A low-power and lowcost RF-MIMO MIMAX system for maximum reliability and performance Figure 1 compliant to the IEEE Standard 2 has recently been proposed 2-4 . It significantly decreases the hardware complexity by performing the adaptive weighting and combining of the antenna signals in the RF front-end 5-8 . Multiple antennas are used to increase the transmission reliability through spatial diversity. .

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