Modified givens rotations for inverse updating in qr decomposition

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A training sequence may include one or more pilot symbols, i.e., OFDM symbols including only pilot information (which is known a priori at the receiver) on the tones.

The pilot symbol(s) are inserted in front of each transmitted frame.

There are many reasons why a cookie could not be set correctly.A receiver in a MIMO-OFDM system may estimate the transmitted signal by performing a QR decomposition on the channel response matrix.The receiver may utilize Givens rotations to perform the decomposition, which may be performed using coordinate rotation digital computer (CORDIC) modules.The results of the QR decomposition may be stored in a memory.A decoder may used the stored results of the decomposition and the received signals to estimate the transmitted signals.

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