《Channel Estimation for Gigabit Multi-user MIMO-OFDM Systems MIMO-OFDM Systems》为国外一博士论文,内附详细MATLAB代码。文章结构如下:
1 An Introduction to MIMO-OFDM Systems 3
1.1 Predicting the Emerging and Future Wireless Communications
Technologies . . . . . . . . . . . . . . . . .. . . . . . . . . . . 4
1.2 Chapter Summary . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3 The MIMO-OFDM System Model . . . . . . . . . . . . . . . . . 9
1.4 The MIMO-OFDM Air Interface . . . . . . . . . . . . . . . . . 13
1.4.1 IQ Constellation Mapping . . . . . . . . . . . . . . . . . 13
1.4.2 Digital multitone/multi-carrier modulation . . . . . . . . 17
1.4.3 Maximum Likelihood Detection . . . . . . . . . . . . . . 19
1.5 The MIMO-OFDM Mapping/De-mapping Function . . . . . . . 23
1.5.1 Space-Frequency Coding . . . . . . . . . . . . . . . . . . 24
1.5.2 Spatial Multiplexing . . . . . . . . . . . . . . . . . . . . 27
1.6 Multi-user MIMO-OFDM . . . . . . . . . . . . . . . . . . . . . 29
1.7 Research Objectives of the Thesis . . . . . . . . . . . . . . .31
2 The Wireless Channel 33
2.1 Multipath Propagation . . . . . . . . . . . . . . . . . . . . 35
2.2 Tapped-Delay-Line System Model . . . . . . . . . . . . . . . . 37
2.2.1 Statistical Model of a Multipath Channel . . . . . . . . . 41
2.2.2 Bandlimited transmission . . . . . . . . . . . . . . . . . 45
2.2.3 Rayleigh Fading Channels . . . . . . . . . . . . . . . . . 48
2.3 Saleh-Valenzuela channel Model . . . . . . . . . . . . . . . . 50
2.4 Correlation of the channel gain parameters of MIMO antennas . 55
2.5 Chapter Summary . . . . . . . . . . . . . . . . . . . . . . . 57
3 Coherent Detection for MIMO-OFDM Systems 61
3.1 OFDM Equalization . . . . . . . . . . . . . . . . . . . . . . 62
3.2 SISO-OFDM Channel Estimation . . . . . . . . . . . . . . . . . 68
3.2.1 One Dimensional Channel Estimation . . . . . . . . . . . 70
3.2.2 Two Dimensional Channel estimation . . . . . . . . . . . 73
3.3 MIMO-OFDM Channel Estimation . . . . . . . . . . . . . . . . 77
3.3
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