JP2011101167A5 - - Google Patents

Claims (7)

A wireless communication apparatus including an MMSE combining processing unit that performs MMSE combining based on a frequency domain received signal obtained by performing discrete Fourier transform on a received signal,
A phase rotation amount estimation unit that estimates a phase rotation amount generated in the frequency domain reception signal due to a shift in discrete Fourier transform timing of the reception signal;
A reverse rotation unit that applies reverse rotation of the rotation amount corresponding to the phase rotation amount estimated by the phase rotation amount estimation unit to the frequency domain reception signal;
With
The wireless communication apparatus, wherein the MMSE combining processing unit calculates an MMSE weight based on the frequency domain received signal reversely rotated by the reverse rotating unit and performs MMSE combining. The phase rotation amount estimation unit is configured to estimate the phase rotation amount based on a frequency domain reception signal after MMSE synthesis once performed,
The reverse rotation unit is configured to apply a reverse rotation of a rotation amount corresponding to the phase rotation amount estimated based on a frequency domain reception signal after MMSE synthesis once performed to the frequency domain reception signal before MMSE synthesis. And
The MMSE synthesis processing unit performs MMSE based on the frequency domain received signal that has been subjected to reverse rotation of the rotation amount corresponding to the phase rotation amount estimated based on the frequency domain received signal after MMSE synthesis once performed. The wireless communication apparatus according to claim 1, wherein weights are calculated to perform MMSE combining. The wireless communication apparatus according to claim 2, configured to repeatedly execute a series of processes by the phase rotation amount estimation unit, the reverse rotation unit, and the MMSE synthesis processing unit. A replica generation unit that generates a transmission signal replica for the data signal based on a demodulated signal obtained by demodulating the data signal included in the frequency domain reception signal after the MMSE synthesis performed once;
The phase rotation amount estimation unit is configured to estimate a phase rotation amount based on a pilot signal and a frequency domain received signal for the pilot signal,
Further, the phase rotation amount estimation unit is configured to estimate the phase rotation amount using a frequency domain reception signal for a data signal by regarding the transmission signal replica as the pilot signal,
The reverse rotation unit is configured to apply a reverse rotation of a rotation amount corresponding to the phase rotation amount estimated also using a frequency domain reception signal for the data signal to the frequency domain reception signal before MMSE synthesis,
The MMSE synthesis processing unit calculates an MMSE weight based on a frequency domain received signal that has been reversely rotated by a rotation amount corresponding to the phase rotation amount estimated also using a frequency domain received signal for the data signal. The wireless communication apparatus according to claim 1, wherein calculation is performed to perform MMSE synthesis. The radio communication apparatus according to claim 4, wherein the replica generation unit is configured to generate a transmission signal replica for the data signal based on a signal after error correction is performed on the demodulated signal. The phase rotation amount estimation unit estimates a phase rotation amount by excluding a transmission signal replica for a data signal in which an error cannot be corrected or an error is detected from a transmission signal replica used for estimation of a phase rotation amount. The wireless communication device according to claim 5. 7. The radio according to claim 4, configured to repeatedly execute a series of processes by the replica generation unit, the phase rotation amount estimation unit, the reverse rotation unit, and the MMSE synthesis processing unit. Communication device.