Signal power estimation for cellular OFDM systems

摘要

Signal power of a received signal, which has a plurality of preamble sequences associated with sub-carrier signals received from a plurality of sub-carriers, in a cellular Orthogonal Frequency Division Multiplexing system may be estimated by estimating as power for at least one preamble sequence of a signal received at a selected receive antenna. The preamble sequence is associated with a base station and a set of sub-carriers. A differential received signal developed for one of the set of sub-carriers is correlated with a normalized differential transmit signal for the preamble sequence, and the estimate of the power for the at least one preamble sequence is extracted based on the correlation.

主权项

1. A method for estimating a power of a received signal, the method comprising:
generating a differential received signal by multiplying the received signal with a factor; calculating a correlation value based on the differential received signal and a normalized transmit signal comprising a predetermined sequence; and scaling a magnitude of the correlation value by a scaling factor to estimate the power of the received signal.