| 摘要 |
<p>A method for detecting a random access signal in an orthogonal frequency division multiplexing system comprises: converting a random access signal received by an antenna into a frequency domain signal, point-multiplying the frequency domain signal by a conjugate of a frequency domain mother code, converting a point multiplication result to a time domain signal, evaluating a modulus square of the converted time domain signal, and obtaining a correlation sequence; evaluating a mean value of the correlation sequence, and regarding a reciprocal of the mean value as an indirect weight factor of the correlation sequence; determining a maximum or a minimum in indirect weight factors of correlation sequences of random access signals received at all antennae, and calculating a weight factor of each antenna according to the maximum or the minimum of the indirect weight factors; and multiplying a correlation sequence of each antenna by a corresponding weight factor of the correlation sequence and then performing a combination to obtain a weighted combined correlation sequence, and detecting the random access signal according to the weighted combined correlation sequence. A device for detecting a random access signal in an orthogonal frequency division multiplexing system is also provided. The method and device improve the detection performance of random access signals.</p> |
