Method and apparatus for spectrum sensing

摘要

In accordance with an example embodiment of the present invention the application discloses a method and an apparatus to receive a signal (501) in a radio device on a radio channel; calculate a plurality of cyclic autocorrelations (504′, 505) for the received signal (501), wherein calculating the plurality of cyclic autocorrelations comprises selecting a cyclic frequency (503) and at least two delay values (502, 512) corresponding to the plurality of cyclic autocorrelations (504′, 505); to compensate a phase offset of at least one of the plurality of cyclic autocorrelations (504′) by at least one compensation term (506) to obtain a plurality of phase compensated autocorrelations (504), wherein the compensation term (506) is dependent on the cyclic frequency (503) and a corresponding delay value of the at least two delay values; and to combine the plurality of phase compensated autocorrelations.

主权项

1. A method, comprising:
receiving a signal in a radio device on a radio channel; calculating a plurality of cyclic autocorrelations for the received signal, wherein calculating the plurality of cyclic autocorrelations comprises selecting a cyclic frequency and at least two delay values corresponding to the plurality of cyclic autocorrelations; compensating a phase offset of at least one of the plurality of cyclic autocorrelations by at least one compensation term to obtain a plurality of phase compensated autocorrelations, wherein the compensation term is dependent on the cyclic frequency and a corresponding delay value of the at least two delay values; and combining the plurality of phase compensated autocorrelations.