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US 8,503,561 B2Granted
Method and apparatus of transmitting reference signal for uplink transmission
AssigneeLG Electronics Inc.
InventorsByoung-Hoon Kim, Dae Won Lee, Byeongwoo Kang, Bong Hoe Kim, Yujin Noh
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Abstract
A method and apparatus of transmitting a reference signal in a wireless communication system is provided. The method includes generating a precoded reference signal or a non-precoded reference signal in accordance with a rank, and transmitting the generated reference signal. Uplink transmission using multiple transmit antennas is supported through reference signal design and related control signaling.
Claims16
A method of transmitting a signal in a wireless communication system, the method performed in a single user equipment (UE) comprising:
- receiving single cyclic information via a physical downlink control channel (PDCCH);
- and
- transmitting, in response to the single cyclic information, reference signals through a first transmit antenna and a second transmit antenna using one pair of available cyclic shift pairs, each pair of the available cyclic shift pairs comprising a first cyclic shift n1, for the first transmit antenna and a second cyclic shift n2 for the second transmit antenna, the first and second transmit antennas being used by the single UE,
- wherein the single cyclic information indicates the first cyclic shift n1, the second cyclic shift n2 is cyclic shift, n1 and n2″ is replaced by determined based on the first cyclic shift n1 in the UE, n1 and n2 contained in one pair of the available cyclic shift pairs are different from cyclic shifts n1 and n2 contained in another pair of the available cyclic shift pairs, respectively, and an interval between the n1 and n2 in each pair of the available cyclic shift pairs is set to a same value.
1 more element
A method of transmitting a signal in a wireless communication system, the method performed in a single user equipment (UE) comprising:
- receiving single cyclic information via a physical downlink control channel (PDCCH);
- and
- transmitting, in response to the single cyclic information, reference signals through a first transmit antenna and a second transmit antenna using one pair of available cyclic shift pairs, each pair of the available cyclic shift pairs comprising a first cyclic shift n1 for the first transmit antenna and a second cyclic shift n2 for the second transmit antenna, the first and second transmit antennas being used by the single UE, wherein the single cyclic information indicates the first cyclic shift n1, the second cyclic shift n2 is determined based on the first cyclic shift n1 in the UE, cyclic shifts contained in each pair of the available cyclic shift pairs are predetermined, and one pair of the available cyclic shift pairs (n1,n2) includes one of (0,4), (1,5), (2,6), and (3,7) .
A user equipment (UE) in a wireless communication system, the UE comprising:
- a receiver configured for receiving single cyclic information via a physical downlink control channel (PDCCH);
- and
- a transmitter configured for transmitting, in response to the single cyclic information, reference signals through a first transmit antenna and a second transmit antenna using one pair of available cyclic shift pairs, each pair of the available cyclic shift pairs comprising a first cyclic shift n1 for the first transmit antenna and a second cyclic shift n2 for the second transmit antenna, the first and second transmit antennas being used by a single UE, wherein the single cyclic information indicates the first cyclic shift n1, the second cyclic shift n2 is determined based on the first cyclic shift n1 in the UE, cyclic shifts contained in each pair of the available cyclic shift pairs are predetermined, and one pair of the available cyclic shift pairs (n1,n2) includes one of (0,4), (1,5), (2,6), and (3,7).
A user equipment (UE) in a wireless communication system, the UE comprising:
- a receiver configured for receiving single cyclic information via a physical downlink control channel (PDCCH);
- and
- a transmitter configured for transmitting, in response to the single cyclic information, reference signals through a first transmit antenna and a second transmit antenna using one pair of available cyclic shift pairs, each pair of the available cyclic shift pairs comprising a first cyclic shift n1 for the first transmit antenna and a second cyclic shift n2 for the second transmit antenna, the first and second transmit antennas being used by a single UE,
- wherein the single cyclic information indicates the first cyclic shift n1, the second cyclic shift n2 is determined based on the first cyclic shift n1 in the UE, n1 and n2 contained in one pair of the available cyclic shift pairs are different from cyclic shifts n1 and n2 contained in another pair of the available cyclic shift pairs, respectively, and an interval between the n1 and n2 in each pair of the available cyclic shift pairs is set to a same value.
1 more element
Dependencies are inferred from the claim text.