Method for transmitting DM-RS mode and transmitter node
A transmitter and node technology, applied in transmission systems, digital transmission systems, radio transmission systems, etc., can solve problems such as inability to demodulate data
Inactive Publication Date: 2018-08-03
TELEFON AB LM ERICSSON (PUBL)
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Problems solved by technology
[0018] However, receiver nodes may not be able to demodulate data transmitted over multiple transport layers
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[0044] figure 2 A basic communication system with a reference signal is shown, wherein the system comprises a transmitter node 10 and a receiver node 12 . Even though the shown example is for a downlink demodulation reference signal (DM-RS), the transmitter node 10 may be represented by a radio base station or user equipment and the receiver node 12 may be represented by a user equipment or radio base station. The transmitter node 10 may comprise a data block generator 14, wherein the DM-RS pattern is inserted into a data block or resource block. The resource blocks comprising the DM-RS are then transmitted to the receiver node 12 over a wireless channel. Furthermore, the DM-RS pattern is predefined between the transmitter node 10 and the receiver node 12, ie the receiver node 12 knows the DM-RS pattern in the signal. Thus, at the receiver node 12, channel estimation is first applied by using the DM-RS target, ie the known DM-RS pattern, in the channel estimator 16. This c...
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The invention relates to a transmitter node for transmitting a demodulation reference signal mode to a receiver node (12) in a resource block by using more than two transmission layers on multiple transmission antennas in a radio communication network. The transmitter node (10) comprises a mapping circuit (1301) configured to map multiple codons to more than two transmission layers; furthermore, the transmitter comprises an additional mapping circuit (1302) configured to map each transmission layer of more than two transmission layers to the corresponding demodulation reference signal port according to a fixed mode based on a transmission order; each demodulation parameter signal port is arranged to add a demodulation reference signal mode to a resource block, and the demodulation reference signal port is associated to two code division multiplexing groups according to an association mode; the code division multiplexing is performed on the transmission layer of each of two code division multiplexing groups, and the frequency division multiplexing is performed on the transmission layers of different code division multiplexing groups; furthermore, the transmitter node (10) comprisesa precoding circuit (1303) configured to pre-code each codon carried through the corresponding transmission layer and a demodulation reference signal mode and a transmission circuit (1304) comprisingmultiple transmission antennas and configured to transmit the pre-coded demodulation reference signal mode to the receiver node (12) in the resource block.
Description
technical field [0001] The invention relates to a transmitter node in a radio communication network and a method therein. In particular, the invention relates to the transmission of demodulation reference signal patterns in a radio communication network. Background technique [0002] The 3rd Generation Partnership Project (3GPP) is responsible for the standardization of the Universal Mobile Telecommunications Service (UMTS) system and the Long Term Evolution (LTE). LTE is a technology for realizing high-speed packet-based communication that can achieve a high data rate both in downlink and uplink, and it is regarded as a next-generation mobile communication system of the UMTS system. The access network of LTE is also called Evolved Universal Terrestrial Access Network (E-UTRAN). The first release of LTE, called Release 8 (Rel-8), offers peak rates of 300 Mbps, radio network latency of 5 ms or less, a significant increase in spectral efficiency and is designed to simplify n...
Claims
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IPC IPC(8): H04L5/00H04B7/0452H04B7/0456H04B7/06
Inventor 胡旸D.阿斯特利D.哈马瓦尔G.约恩格伦宋兴华汪剑锋
Owner TELEFON AB LM ERICSSON (PUBL)