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US 2010/0142658 A1Published application
Apparatus and method for removing common phase error in a dvb-t/h receiver
AssigneeThomson Licensing
InventorsPeng Liu, Jilin Zou, Li Zou
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Abstract
A receiver is a Digital Video Broadcasting-Terrestrial/Handheld (DVB-T/H) receiver. The DVB-T/H receiver comprises a phase error corrector and a channel estimation and equalization element. The phase error corrector rotates a signal in accordance with an estimate of a phase error, e.g., CPE, which is determined as a function of channel state information (CSI) provided by the channel estimation and equalization element.
Claims20
A method for use in a receiver, the method comprising:
- receiving a signal, the signal representing an orthogonal frequency division multiplexed (OFDM) signal;
- and
- performing phase error correction on the signal as a function of channel state information (CSI) for providing a phase corrected signal.
Apparatus comprising:
- a downconverter for providing a downconverted signal;
- and
- a processor operative on a first signal that is representative of a fast fourier transform of the downconverted signal for estimating a phase error as a function of channel state information (CSI) and for correcting a phase of a second signal in accordance with the estimated phase error, wherein the second signal is representative of a spectrum shifted version of the first signal.
Apparatus comprising:
- a fast fourier transform (FFT) for providing an FFT output signal comprising a number of samples;
- a spectrum shifter for reordering the samples in the FFT output signal to provide a spectrum shifted signal;
- and
- a phase corrector responsive to channel state information (CSI) for estimating a phase error from the FFT output signal and for correcting a phase of the spectrum shifted signal in accordance with the estimated phase error.
1 more element
Dependencies are inferred from the claim text.