DEMODULATION REFERENCE SIGNAL TRANSMISSION METHOD, APPARATUS AND SYSTEM

摘要

Provided are a demodulation reference signal transmission method, apparatus and system. The method is applied to a long term evolution (LTE) communication system, the LTE communication system comprises a first device and a second device, and the first device communicates with the second device via an edge link. The method comprises: the first device sends an additional demodulation reference signal (DMRS) to the second device via an edge link, wherein the additional DMRS is located at the last orthogonal frequency division multiplexing (OFDM) symbol of each subframe of the edge link. By means of the embodiments of the present invention, a new DMRS sequence is added, and the new DMRS sequence is placed in the last symbol of a subframe of the edge link in the LTE system for sending, so that an original DMRS is enhanced, and the accuracy of channel estimation is improved.