| 摘要 |
A receiver which operates to recover data from spread spectrum radio signals, which include radio signals generated from a combination of the data and a data spreading code associated with the user and radio signals generated from a combination of a predetermined sequence of pilot data and a pilot spreading code, the receiver comprising a plurality of antennas (6), each of which is arranged to detect a different version of the radio signals, base band conversion means (14), coupled to the plurality of antennas (6) and arranged to generate, for each antenna, base band signals samples representative of the version of the radio signals, and a data recovery means (16) which operates to correlate each version of the signals samples with respect to the pilot spreading code, form at least one covariance matrix from a frequency domain representation of a predetermined temporal window of the correlated pilot signals samples, correlate each version of the signals samples with respect to the user data spreading code, form a frequency domain representation of each version of the data correlated signal samples, and detect the data from the frequency domain data correlated signal samples in combination with the at least one covariance matrix.
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