Joint Blind Channel and Control Signal Estimation for OFDM Systems

This paper introduces a technique for joint channel and control signal estimation for OFDM systems. The basic idea proposed is to embed the control signal information in the pilot sequence such that when it is estimated at the receiver it can reveal both the channel response and the intended control signal information. We also provide a novel technique, which utilizes the channel's correlation, for recovering the pilot sequence, and show that we can achieve accurate channel and side information estimation even at relatively low SNR values. Additionally, the impact of various sequence types on the pilot sequence detectability are investigated under different scenarios. It will be demonstrated here that the proposed method can successfully work and used in a number of applications.