Method of transmitting reference signals in a wireless communication having multiple antennas
First Claim
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1. A method of transmitting uplink (UL) signals using a plurality of subcarriers by a user equipment (UE) in a wireless communication system, the method comprising:
- generating two or more UL demodulation reference signals (DMRSs) for two or more data layers including a first layer and a second layer;
mapping the two or more UL DMRSs to resource elements (REs) on an UL subframe per antenna ports used for transmitting the two or more data layers,transmitting the two or more UL DMRSs,wherein when a rank is 3 or more, the two or more UL DMRSs are mapped non-continuously in a frequency domain, and are transmitted based on an orthogonal frequency division multiple access (OFDMA) scheme, andwherein when the rank is 2 or less, the two or more UL DMRSs are mapped continuously in the frequency domain, and are transmitted based on a single carrier-frequency division multiple access (SC-FDMA) scheme.
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Abstract
A method of transmitting signals by a transmitting end in a wireless communication system comprises sharing control information related to reference signal with a receiving end; generating one or more precoded reference signals considering a given rank; allocating the one or more precoded reference signals to have a specific pattern within a subframe, wherein the specific pattern is varied depending on the control information; and transmitting the subframe through multiple antennas to the receiving end.
68 Citations
9 Claims
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1. A method of transmitting uplink (UL) signals using a plurality of subcarriers by a user equipment (UE) in a wireless communication system, the method comprising:
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generating two or more UL demodulation reference signals (DMRSs) for two or more data layers including a first layer and a second layer; mapping the two or more UL DMRSs to resource elements (REs) on an UL subframe per antenna ports used for transmitting the two or more data layers, transmitting the two or more UL DMRSs, wherein when a rank is 3 or more, the two or more UL DMRSs are mapped non-continuously in a frequency domain, and are transmitted based on an orthogonal frequency division multiple access (OFDMA) scheme, and wherein when the rank is 2 or less, the two or more UL DMRSs are mapped continuously in the frequency domain, and are transmitted based on a single carrier-frequency division multiple access (SC-FDMA) scheme. - View Dependent Claims (2, 3, 4, 5)
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6. A user equipment (UE) for transmitting uplink signals using a plurality of subcarriers in a wireless communication system, the UE comprising:
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a processor adapted to generate two or more UL demodulation reference signals (DMRSs) for two or more data layers including a first layer and a second layer, and to map the two or more UL DMRSs to resource elements (REs) on an UL subframe per antenna ports used for transmitting the two or more data layers; and a transmitter adapted to transmit the two or more UL DMRSs, wherein when a rank is 3 or more, the two or more UL DMRSs are mapped non-continuously in a frequency domain, and are transmitted based on an orthogonal frequency division multiple access (OFDMA) scheme, and wherein when the rank is 2 or less, the two or more UL DMRSs are mapped continuously in the frequency domain, and are transmitted based on a single carrier-frequency division multiple access (SC-FDMA) scheme. - View Dependent Claims (7, 8, 9)
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Specification