Method and system for performing channel estimation in a multiple antenna block transmission system
View Patent ↗Methods and systems for performing channel estimation in a multiple antenna block transmission system are provided so as to improve the channel estimation quality and/or the delay spread of the channels that can be estimated.
1. A method for performing channel estimation for each transmit antenna-receive antenna pair in a block transmission system, the method comprising the steps of:
a. estimating at least one first delay profile for each receive antenna corresponding to at least one first transmit antenna of a transmitter, the pilot density of the at least one first transmit antenna being significantly higher among a plurality of transmit antennas of the transmitter;
b. estimating at least one desired delay profile for each receive antenna corresponding to each remaining transmit antenna of the transmitter based on the at least first delay profile, each remaining transmit antenna having pilot density lesser than the at least one first transmit antenna; and
c. estimating the channel response of each receive antenna corresponding to each remaining transmit antenna based on the corresponding desired delay profile; whereby, the delay spread of the channels corresponding to the remaining transmit antennas that can be estimated is extended to that of the at least one first transmit antenna.
2. The method of claim 1 , wherein the at least one first delay profile comprises a first tap delay profile.
3. The method of claim 1 , wherein the at least one first delay profile comprises a first power delay profile.
4. The method of claim 1 , wherein the at least one first delay profile comprises a first channel impulse response (CIR) auto-correlation matrix.
5. The method of claim 1 , wherein the at least one desired delay profile comprises a desired tap delay profile.
6. The method of claim 1 , wherein the at least one desired delay profile comprises a desired power delay profile.
7. The method of claim 1 , wherein the at least one desired delay profile comprises a desired channel impulse response (CIR) auto-correlation matrix.
8. A system for performing channel estimation for each transmit antenna-receive antenna pair in a block transmission system, the system comprising:
a. a first delay profile estimator, the first delay profile estimator estimating at least one first delay profile for each receive antenna corresponding to at least one first transmit antenna of a transmitter, the pilot density of the at least one first transmit antenna being highest among a plurality of transmit antennas of the transmitter;
b. a desired delay profile estimator, the desired delay profile estimator estimating at least one desired delay profile for each receive antenna corresponding to each remaining transmit antenna of the transmitter based on the at least first delay profile, each remaining transmit antenna having pilot density lesser than the at least one first transmit antenna; and
c. a channel response estimator, the channel response estimator estimating the channel response of each receive antenna corresponding to each remaining transmit antenna based on the corresponding at least one desired delay profile;
whereby, the delay spread of the channels corresponding to the remaining transmit antennas that can be estimated is extended to that of the at least one first transmit antenna.
9. The system of claim 8 , wherein the first delay profile estimator, the desired delay profile estimator and the channel response estimator can be integrated into a single module.