Method for determining pilot arrangement and base station
AssigneeHuawei Technologies Co., Ltd.
InventorsChenhao Qi, Yiqun Wu, Shunqing Zhang
Life of this patent
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Abstract
This application discloses a method for determining a pilot arrangement and a base station. The method includes the following steps. S1. Select a first optimized pilot arrangement P1 from an available subcarrier set G as a pilot arrangement of the first transmit antenna, and set G1=G−P1; S2. Perform a cyclic shift on the P1; if a Pi obtained after the shift is a subset of the G1, use the Pi as a pilot arrangement of the ith transmit antenna; or if a Pi obtained after the shift is not a subset of the G1, select a Pi from the G1 as a pilot arrangement of the ith transmit antenna; and set G1=G1−Pi and i=i+1, and repeatedly perform S2 until i is equal to a quantity of transmit antennas.
Claims10
A method, comprising:
- selecting a first optimized pilot arrangement P1 from an available subcarrier set G as a pilot arrangement of a first transmit antenna of a plurality of transmit antennas, and setting a difference set G1 according to the relation G1=G−P1;
- performing a cyclic shift on the P1 to obtain a Pi, wherein i is a sequence number corresponding to a transmit antenna of the plurality of transmit antennas, and i is a natural number in a range of 2 to T, wherein T is a quantity of transmit antennas in the plurality of transmit antennas;
- selecting a pilot arrangement of an ith transmit antenna of the plurality of transmit antennas, the selecting comprising:
- in response to a Pi obtained after the shift being a subset of the G1, use the Pi as a pilot arrangement of the ith transmit antenna;
- and
- in response to a Pi obtained after the shift not being a subset of the G1, select a Pi from the G1 as a pilot arrangement of the ith transmit antenna;
- and
- setting G1 according to the relation G1=G1−Pi and incrementing i according to the relation i=i+1, and repeatedly performing cyclic shifts on the Pi to obtain a new Pi, selecting the pilot arrangements of the ith transmit antenna, and incrementing i according to the relation i=i+1 until i is equal to the quantity of transmit antennas in the plurality of transmit antennas.
A base station, comprising:
- a processor, configured to:
- select a first optimized pilot arrangement P1 from an available subcarrier set G as a pilot arrangement of a first transmit antenna of a plurality of transmit antennas, and set a difference set G1 according to the relation G1=G−P1;
- perform a cyclic shift on the P1 to obtain a Pi, wherein i is a sequence number corresponding to a transmit antenna of the plurality of transmit antennas, and i is a natural number in a range of 2 to T, wherein T is a quantity of transmit antennas in the plurality of transmit antennas;
- select a pilot arrangement of an ith transmit antenna of the plurality of transmit antennas, the selecting comprising:
- in response to a Pi obtained after the shift being a subset of the G1, using the Pi as a pilot arrangement of the ith transmit antenna;
- and
- in response to a Pi obtained after the shift not being a subset of the G1, selecting a Pi from the G1 as a pilot arrangement of the ith transmit antenna;
- and
- set G1 according to the relation G1=G1−Pi and increment i according to the relation i=i+1, and repeatedly perform cyclic shifts on the Pi to obtain a new Pi, select pilot arrangements of the ith transmit antenna of the plurality of transmit antennas, and increment i according to the relation i=i+1 until i is equal to the quantity of transmit antennas of the plurality of transmit antennas;
- and
- the plurality of transmit antennas, configured to transmit a pilot arrangement on each transmit antenna of the plurality of transmit antennas, wherein the pilot arrangement is obtained by the processor.
Dependencies are inferred from the claim text.