Angular-domain channel model and channel estimation
AssigneeHong Kong Applied Science and Technology Research Institute Company Limited
InventorsPeter Wing Chau Chan, Derek Chun Kit Lee, Roger Shu Kwan Cheng, Chih-Lin I
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Abstract
A method of modeling wireless communication channels in angular domain is disclosed. The method includes considering radiation patterns 101, 102 of the transmitter antenna and the receiver antenna, wherein the radiation patterns are represented by antenna characteristics sampled at a plurality of angular directions. A method of channel estimation based on the method of modeling wireless communication channel in angular domain is also disclosed.
Claims20
A method of modeling wireless communication channel in angular domain, comprising:
- representing radiation patterns of at least one transmitter antenna and at least one receiver antenna by antenna characteristics sampled at a plurality of angular directions;
- and
- incorporating said radiation patterns of at least one transmitter antenna and at least one receiver antenna into a model for wireless communication channel;
- wherein the radiation patterns and channel model are separable linear processes and the signal output by a receiver is mathematically expressed as:
- Y=Ar HAAtTX+W,
- where Ar is the radiation pattern of the receiver antenna;
- At is the radiation pattern of the transmitter antenna;
- AtT is the transpose of At;
- X is the input signal;
- HA is the channel model;
- and
- W is the noise;
- the modeling being implemented in or by a device in a wireless communication system.
A method of channel estimation for a wireless communication channel by modeling wireless communication channel in angular domain;
- said channel estimation of wireless communication channel comprising the steps of:
- representing radiation patterns of at least one transmitter antenna and at least one receiver antenna by antenna characteristics sampled at a plurality of angular directions;
- and
- incorporating said radiation patterns of at least one transmitter antenna and at least one receiver antenna into a model for wireless communication channel;
- wherein signal output by a receiver is mathematically expressed as:
- Y=ArHAAtTX+W,
- where Ar is the radiation pattern of the receiver antenna;
- At is the radiation pattern of the transmitter antenna;
- AtT is the transpose of At;
- X is the input signal;
- HA is the channel model;
- and
- W is the noise;
- the channel estimation being implemented in or by a device in a wireless communication system.
A method of modeling wireless communication channel in angular domain, comprising:
- representing radiation patterns of at least one transmitter antenna and at least one receiver antenna by antenna characteristics sampled at a plurality of angular directions;
- incorporating said radiation patterns of at least one transmitter antenna and at least one receiver antenna into a model for wireless communication channel;
- and
- sampling said radiation patterns of antennas such that
- a
- ij
- =
- a
- i
-
- (
- 2
-
- π
-
- (
- j
- -
- 1
- )
- M
- )
- ,
- where aij is the j-th basis signal of ai(θ);
- ai(θ) is the radiation pattern of the i-th antenna element;
- and
- M is the number of samples acquired;
- the modeling being implemented in or by a device in a wireless communication system.
Dependencies are inferred from the claim text.