A Simple Design for Joint Channel Estimation and Data Detection in an Alamouti OFDM System

To obtain full benefits of the Alamouti space-time code design on a time-varying acoustic channel, the channel variation is decoupled into two parts: the gain, which is assumed to be constant over an Alamouti pair (two consecutive OFDM blocks), and the phase, which is not restricted in this manner, but allowed to vary from one block to another in a piecewise linear fashion. Under this model, the receiver assumes a simplified structure in which conventional Alamouti data detection and channel estimation are aided by Doppler tracking.

Provided by: Northeastern University Topic: Mobility Date Added: Jul 2010 Format: PDF

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