Systems and methods for frequency domain local oscillator frequency offset compensation
AssigneeHuawei Technologies Co., Ltd.
InventorsMeng Qiu, Xuefeng Tang, Ahmed Mohamed Medra, Hossein Najafi, Ali Bakhshali
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Abstract
The disclosed systems and methods for frequency domain (FD) local oscillator frequency offset (LOFO) compensation. The method comprising: i) compensating, by an integer Fast Fourier Transform (FFT) bins-based oscillator, LOFO in a received signal by an integer number of FFT bins; and ii) compensating, by a fractional FFT bins-based oscillator, LOFO in the compensated signal by the integer FFT bins-based oscillator with a fine compensation resolution of a fractional number of FFT bins.
Claims27
A frequency domain (FD) local oscillator frequency offset (LOFO) compensation system comprising:
- an integer Fast Fourier Transform (FFT) bins-based oscillator configured to compensate LOFO in a received signal by an integer number of FFT bins;
- and
- a fractional FFT bins-based oscillator configured to further compensate LOFO in the compensated signal by the integer FFT bins-based oscillator with a fine compensation resolution of a fractional number of FFT bins.
A frequency domain (FD) local oscillator frequency offset (LOFO) compensation method comprising:
- compensating, by an integer Fast Fourier Transform (FFT) bins-based oscillator, LOFO in a received signal by an integer number of FFT bins;
- and
- compensating, by a fractional FFT bins-based oscillator, LOFO in the compensated signal by the integer FFT bins-based oscillator with a fine compensation resolution of a fractional number of FFT bins.
A frequency domain (FD) local oscillator frequency offset (LOFO) compensation system comprising:
- a fractional Fast Fourier Transform (FFT) bins-based oscillator configured to compensate LOFO in a received signal with a fine compensation resolution of a fractional number of FFT bins;
- and
- an integer FFT bins-based oscillator configured to further compensate LOFO in the compensated signal by the fractional FFT bins-based oscillator by an integer number of FFT bins.
Dependencies are inferred from the claim text.