| 摘要 |
According to a method and apparatus taught herein, signal impairment correlations across antennas in a multi-antenna receiver are determined using data values rather than pilot values in a multi-frequency signal received at each of the receiver antennas. For example, in an OFDM signal chunk having a number of data sub-carriers and a smaller number of pilot sub-carriers, processing herein determines received signal correlation estimates across the receiver antennas based on at least the data sub-carriers within the chunk. Impairment correlation estimates are then derived from the received signal correlation estimates and channel estimates, which may be based on the pilot sub-carriers received in the same and/or other OFDM chunks. This processing enables the receiver to maintain accurate estimates of signal impairment correlations for interference suppression, even in the presence of very low pilot density.
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