Method of estimating local oscillator leakage
AssigneeHong Kong Applied Science and Technology Research Institute Company Limited
InventorsHong Hu, Jianping Zheng, Xiangyu Liu, Yuxian Zhang
Life of this patent
Estimating the term…
Abstract
A method of estimating local oscillator leakage (LOL) for a radio frequency (RF) signal transmitter. The method comprises generating a transmitter wideband baseband signal (s(t)) with a direct current (DC) voltage element of the transmitter wideband baseband signal (s(t)) removed or blocked and an average of the transmitter wideband baseband signal (s(t)) set to zero. The method includes processing said transmitter wideband baseband signal (s(t)) to form a RF signal; processing the RF signal to obtain a receiver baseband signal (y(t)); and determining a magnitude of an average of the receiver baseband signal (y(t)) as comprising a magnitude of the transmitter DC offset.
Claims20
A method of estimating local oscillator leakage (LOL) for a radio frequency (RF) signal transmitter, the method comprising the steps of:
- generating a transmitter wideband baseband signal (s(t)) with a direct current (DC) voltage element of the transmitter wideband baseband signal (s(t)) removed or blocked and an average of the transmitter wideband baseband signal (s(t)) set to zero;
- processing said transmitter wideband baseband signal (s(t)) to form an RF signal;
- processing the RF signal to obtain a receiver baseband signal (y(t));
- and
- determining a magnitude of an average of the receiver baseband signal (y(t)) as comprising a magnitude of the transmitter DC offset.
A method of estimating local oscillator leakage (LOL) for a radio frequency (RF) signal receiver, the method comprising the steps of:
- generating a transmitter wideband baseband signal (s(t)) with a region around a direct current (DC) voltage element of the transmitter wideband baseband signal (s(t)) removed and an average of the transmitter wideband baseband signal (s(t)) set to zero or generating an empty transmitter baseband signal (s(t));
- processing said transmitter wideband baseband signal (s(t)) to form a RF signal;
- processing the RF signal to obtain a receiver baseband signal (y(t));
- and
- determining a magnitude of an average of the receiver baseband signal (y(t)) as comprising at least a magnitude of the receiver DC offset.
A method of estimating local oscillator leakage (LOL) for a radio frequency (RF) signal receiver, the method comprising the steps of:
- generating a transmitter wideband baseband signal (s(t)) with no input signal in a timeslot centered on a direct current (DC) voltage element of the transmitter wideband baseband signal (s(t));
- processing said transmitter wideband baseband signal (s(t)) to form a RF signal;
- processing the RF signal to obtain a receiver baseband signal (y(t));
- and
- accumulating and averaging a timeslot centered on the DC element of the receiver baseband signal (y(t)) to obtain a magnitude of the accumulated average as comprising at least a magnitude of the receiver DC offset.
Dependencies are inferred from the claim text.