MIMO-OFDM Baseband Transceiver Design for High Throughput WLAN
Date Issued
2004
Date
2004
Author(s)
Yu, Chi-Yeh
DOI
zh-TW
Abstract
Due to increasing demand on new multimedia application, such as HDTV and interactive gaming, next generation wireless LAN will focus on high throughput and QOS within limited bandwidth. Multiple-input multiple-output (MIMO) signal pro- cessing techniques combined with orthogonal frequency division multiplexing (OFDM) can provide a high throughput link as well as an increased diversity gain in frequency selective fading channels, and is therefore regarded as a promising solu- tion in the future IEEE 802.11n standard for high throughput wireless LAN.
In the thesis, we propose a MIMO-OFDM baseband transceiver design using two transmit antennas and two receive antennas for high throughput wireless LAN. According to the functional requirement of backward compatibility by IEEE 802.11 TGn, we set the OFDM parameters to be same with the IEEE 802.11a standard. Moreover, we design a packet format suitable for receiver algorithms such as timing synchronization, frequency synchronization, and channel estimation. A MIMO- OFDM receiver is accordingly designed and implemented in cycle-based C code with complete algorithms including initial synchronization, tracking, channel esti- mation, and MIMO equalization. Finally, we use IEEE 802.11 TGn channel model D to simulate the correltated fading channel. Under different kinds of channel impairments such as PA non-linearity, carrier frequency offset, phase noise, I/Q imbalance, timing offset and DC offset, simulation results verify the desired signal to noise ratio for the proposed receiver to attain double transmission rate of the current IEEE 802.11a wireless LAN standard.
Subjects
通道容量
無線區域網路
時空編碼
多重輸出
多樣性
空間多工傳輸
封包格式
正交分頻多工
收發機架構
多重輸入
channel capacity
OFDM
MIMO
LAN
High Throughput
Spatial Multiplexing
Transceiver architecture
Space-Time code
Packet format
802.11n
pre802.11n
diversity
Wireless
Type
thesis
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