| 摘要 |
The present invention relates to orthogonal cover code generating apparatus, demodulation reference signal generating apparatus, and methods thereof. The demodulation reference signal generator comprises a non-correlation sequence generator configured to generate a non-correlation sequence for pilot of a first resource block; a first spectrum spreading unit configured to spread spectrums of elements in the non-correlation sequence for pilot to be mapped to a first frequency resource of the first resource block, by using a first group of Orthogonal Cover Codes (OCCs); a second spectrum spreading unit configured to spread spectrums of elements in the non-correlation sequence for pilot to be mapped to a second frequency resource of the first resource block, by using a second group of OCCs; the first and second frequency resources are adjacent frequency resources with respect to a first group of data streams, and the first and second groups of OCCs are mirrors in column to each other; and a mapping unit configured to map the spectrum-spread elements to the first and second frequency resources, respectively. The methods and apparatuses according to the present invention can enhance pilot randomization, remove the problem of pilot transmission power imbalance, and satisfy the requirement on orthogonality at the two dimensions of both time and frequency. |
