Downlink user dedicated demodulation reference signal transmitting method and device
A technology of demodulation reference signal and transmission method, which is applied in the field of transmission of downlink user-specific demodulation reference signal, can solve the problems of reducing NCT resource utilization, inability to transmit downlink data, DM-RS does not support transmission, etc., to improve transmission Efficiency and spectrum utilization, effect of improving data demodulation performance
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Embodiment 1
[0139] Embodiment 1: Corresponding to the above method 1 or scheme 1 or mode 1;
[0140] For regular downlink subframes (that is, downlink subframes other than TDD special subframes), the DM-RS mapping resource in the DM-RS resource mapping method of the corresponding antenna port in Rel-10 is shifted in the time domain to obtain: Figure 6a to Figure 6j The shown DM-RS resource mapping method;
[0141] For example: Mode 1: Shift the first two columns of DM-RS mapping resources in Rel-10 to the 2nd and 3rd OFDM symbols (or the 3rd and 4th OFDM symbols), and get Figure 6a (under regular CP) and Figure 6b (under extended CP);
[0142] Method 2: Shift the last column of DM-RS mapping resources in Rel-10 to the second OFDM symbol (or the third OFDM symbol), and get Figure 6c (under regular CP) and Figure 6d (under extended CP);
[0143] Method 3: Shift the first two columns of DM-RS mapping resources in Rel-10 to the first and second OFDM symbols (or the second and third ...
Embodiment 2
[0153] Embodiment 2: Corresponding to the above method 1 or scheme 1 or mode 1;
[0154] For TDD special subframes, the DM-RS mapping resource in the DM-RS resource mapping method of the corresponding antenna port in Rel-10 is shifted in the time domain to obtain the following: Figure 7a to Figure 7i The DM-RS resource mapping method shown;
[0155] For example, for a conventional CP: Method 1: Shift the first two columns of DM-RS mapping resources in Rel-10 to the first and second OFDM symbols, and get Figure 7a ;
[0156] Method 2: Shift the first two columns of DM-RS mapping resources in Rel-10 to the first and second OFDM symbols, and for special subframe configurations 1 / 2 / 6 / 7, move the last two columns of DM-RS mapping resources to After shifting 2 OFDM symbols (or backward shifting 1 OFDM symbol), we get Figure 7b ;
[0157] Mode 3: Shift the first two columns of DM-RS mapping resources in Rel-10 to the second and third OFDM symbols, and get Figure 7c ;
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Embodiment 3
[0164] Embodiment 3: Corresponding to the above-mentioned method 2 or scheme 2 or mode 2;
[0165] For conventional downlink subframes, in the downlink conventional CP, according to the subcarrier position where the DM-RS mapping resource is located in the DM-RS resource mapping method of the corresponding antenna port in Rel-10, the second and third subcarriers in a subframe Add DM-RS mapping resource on OFDM symbol, get as Figure 8a The shown DM-RS resource mapping method;
[0166] When extending the CP in the downlink, according to the DM-RS resource mapping method of the corresponding antenna port in Rel-10, the subcarrier position of the DM-RS mapping resource on the first two or last two OFDM symbols of the DM-RS mapping resource is located , add DM-RS mapping resources on the 2nd and 3rd OFDM symbols in a subframe, get as Figure 8b or Figure 8c The DM-RS resource mapping method shown; or on the first and second OFDM symbols, or on the third and fourth OFDM symbols...
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