| 摘要 |
<p>Provided is a pre-coding method for mixed multiplexing demodulation reference signals (DMRSs). The method includes: determining the multiplexing relationships between DMRS ports; mapping respectively the data transmission layers into the DMRS ports whose multiplexing relationships have been determined; and pre-coding the pilot sequence corresponding to each DMRS port according to the correspondence relationships between the data transmission layers and the DMRS ports. Also provided are a method for mapping layers into mixed multiplexing demodulation reference signal (DMRS) ports and an apparatus for pre-coding based on mixed multiplexing demodulation reference signals (DMRSs). By using the schemes of the invention, the interference between layers corresponding to the different codeword streams is avoided and the accuracy of the channel estimation is improved. Meanwhile, because the schemes of the invention adopt the fixed mapping manner, the possibility of the random mapping is reduced and the overhead of the control signaling is decreased.</p> |
