MIMO-OFDM system baseband transceiver architecture design for WLAN applications
Date Issued
2005
Date
2005
Author(s)
Li, Pei-Hsueh
DOI
en-US
Abstract
Wireless communication becomes vital for our daily life in recent years since it provides not only great convenience but also high practicability for us. The enormous demand for mobile phones in the commercial market is the best example. In terms of WLAN applications, the success of IEEE 802.11a/b/g also shows the tendency toward wireless communication. However, the throughput or the covering range supplied by the existing WLAN standards reveals insufficiently and inadequately for current swift-growing applications and is needed to improve. As the MIMO technology had been proved to have a great potential for achieving a very high data rate with a practical SNR or equivalently a larger covering range with an acceptable throughput, it is reasonable to apply the powerful technology to the existing OFDM based wireless transceiver to enhance the system performance. As a result, in this thesis, we designed and verified by simulations a 2X2 MIMO-OFDM baseband transceiver mainly for WLAN applications. The architecture of the transmitter is based on the IEEE 802.11a standard but is introduced a spatial multiplexer to distribute the single data stream to multiple spatial streams such that the transmission via multiple antennas is feasible. Besides, the channel models are used those provided by the IEEE 802.11 task group N with practical considerations. The architecture of the receiver is designed to deal with the synchronization problems such as timing and frequency offset errors. In addition, the channel estimation and spatial MIMO signal processing are also including in the receiver design.
At last, the entire system is verified with the aid of simulation tools such as Agilent advanced design system (ADS) and MATLAB.
Subjects
多輸入多輸出
正交分頻多工
通道模型
時間同步
頻率同步
通道估測
MIMO
OFDM
channel model
timing synchronization
frequency synchronization
channel estimation
Type
thesis
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