Fourier-transform based linear equalization for MIMO CDMA...

Details Fourier-transform based linear equalization for MIMO CDMA... Fourier-transform based linear equalization for MIMO CDMA...

2004-06-04

2008-09-02

Nguyen, Tu (Department: 2618)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Fourier transform

C370S335000

Reexamination Certificate

active

07420916

ABSTRACT:
In the reception of a downlink MIMO CDMA signal, the receiving unit performs a simplified process of linear equalization that eliminates the need for inverting the correlation matrix. The correlation matrix is approximated to a good degree by a circulation matrix that is diagonalized by FFT operations, thus substituting two FFTs and one IFFT having a complexity ofO(LF⁡(N⁢⁢Δ)3+(N⁢⁢Δ)2+2⁢(N⁢⁢Δ)2⁢LF⁢log2⁢LF)for the direct matrix inversion having a complexity of O(LF3).

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