Implementation of Iterative Channel Equalization for MIMO Systems in WCDMA Downlink
Cavallaro, Joseph R.
de Baynast, Alexandre
MIMO; WCDMA; Downlink; Equalization; Conjugate Gradient; 1xEV-DV; fixed-point
In downlink transmission, channel multipaths destroy the orthogonality between users causing Multiple Access Interference (MAI). In order to restore the orthogonality between the users, chip-level channel equalization based on the iterative conjugate-gradient (CG) algorithm has been proposed in [Heikkilla '02]. We extend this approach to the multiple transmit antenna case and propose 16-bit fixed point implementation. Simulations show the robustness of the fixed point implementation of the proposed algorithm. Moreover, this approach outperforms RAKE receiver in all cases.
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- ECE Publications