US 5,710,796 A · Method and receiver for determining a phase error in a radio-frequency signal

Abstract

A method for determining a phase error in a radio-frequency signal received by a receiver, wherein an impulse response of a received signal is calculated, measuring points are chosen from the signal, and samples are taken from the surrounding areas of the measuring points. The samples are filter with a complex adapted filter. A phase error in the samples is measured from the filtering result, and the total phase error in the received signal is calculated on the basis of the measured phase error. In order to be also able to measure large phase errors, the measuring points are chosen on the basis of phase errors measured from signals received earlier, in such a manner that the phase error at the measuring points remains within predetermined limits. The receiver includes a compensator for the phase and frequency errors in the received signal.

Claims13

Dependent claims

A method for determining a phase error in a received radio-frequency signal, comprising:

calculating an impulse response of a received signal;
choosing measuring points said signal, and taking samples from areas surrounding said measuring points;
filtering said samples with a complex adapted filter;
measuring the phase error in said samples from the filtering result;
and
calculating the total phase error in the received signal on the basis of the measured phase error;
said choosing of said measuring points being accomplished on the basis of phase errors measured from signals received earlier so that the phase errors at the measuring points will remain within predetermined limits.

4 more elements

Dependencies are inferred from the claim text.

Method and receiver for determining a phase error in a radio-frequency signal

Life of this patent

Method and receiver for determining a phase error in a radio-frequency signal

Life of this patent

Abstract

Claims13