... ICI and degrades the performance of OFDM systems. In this chapter, a novel pilot pattern and corresponding channel estimation and data detection method for OFDM systems with fast fading channels ... APPENDIX B: The derivation of equation (3-20) in Chapter 3 171 APPENDIX C: The derivation of the joint PDF of two arbitrary correlated Ricean random variables 173 Appendix D: List of Abbreviations ... ×⎡⎤=⎣⎦aaa a and ,,,0,,1 ,,(1)1Til il il ilQQaa a +×⎡⎤=⎣⎦ a . The estimated coefficientsˆi a can be written as ,0 ,1 , 1(1)1ˆˆˆ ˆTTT Tiii iLQL−+×⎡⎤=⎣⎦aaa a and ,,,0,,1...