Patent ID: 8773970

Claim:
A method for detecting a signal in an LTE system, comprising: receiving, by an eNodeB, a data part of a signal sent by a UE on a channel resource; calculating, by the eNodeB, a signal power P s and a noise power P n according to the received data part of the signal sent by the UE on the channel resource, a Constant Amplitude Zero Auto-Correlation (CAZAC) sequence, an orthogonal sequence W distributed to the UE, and a sequence W n orthogonal to the W and stored by the eNodeB; and comparing a ratio of P s to P n with a predetermined threshold, and determining a corresponding detection result according to a comparison result; wherein the step of calculating P s is specifically as follows: performing a multiplication between the data part of the signal sent by the UE on the channel resource and a conjugate of the CAZAC sequence and performing a summation of the multiplication to get a summation result; then performing a multiplication between the summation result and a conjugate of the orthogonal sequence W distributed to the UE, and performing a summation of the multiplication performed between the summation result and a conjugate of the orthogonal sequence W to get a second summation result; and squaring a modulus of the second summation result to obtain P s .