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US 10,594,517 B1Granted
Channel estimation system and method thereof
AssigneeWistron Neweb Corp.
InventorsHsin-Yuan Lo, Shang-Ho Tsai, Shoou-Hann Huang, Chun-Hsiung Chuang
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Abstract
A channel estimation system and method thereof is provided. By utilizing the nature of the millimeter-wave channel with sparse path, the channel estimation problem is transformed from estimating the entire channel matrix to estimating independent parameters of the millimeter-wave channel. These parameters are angle of arrival (AoA) and angle of departure (AoD), and complex gain of the channel paths.
Claims26
A channel estimation system, comprising:
- a first transceiver, including a first baseband circuitry and a plurality of first antennas, configured to transmit a downlink omnidirectional signal with one of the plurality of first antennas;
- a second transceiver, including:
- a plurality of second antennas, configured to receive the downlink omnidirectional signal;
- a RF chain circuit coupled to the plurality of first antennas;
- a second baseband circuitry, coupled to the RF chain circuit, wherein the first baseband circuitry and the second baseband circuitry are configured to estimate channels by performing the following steps:
- obtaining first received signals by processing the downlink omnidirectional signal from the plurality of second antennas,
- generating a plurality of receiving array responses corresponding to receiving angles in a determined range of angle, respectively;
- estimating an angle of arrival (AoA) by executing an AoA estimating algorithm, wherein the AoA estimating algorithm comprising:
- obtaining dot products of the plurality of receiving array responses and the first received signals, respectively;
- and
- selecting one of the receiving angles corresponding to a maximum value among the obtained dot products as the AoA;
- using a parameter-separated model to obtain channel complex gains from the first received signals;
- providing long-term statistic information associated to the channel complex gains according to structural parameters of the second transceiver;
- establishing a Bayesian Linear Estimator to estimate the channel complex gain;
- configuring the second transceiver to transmit an uplink omnidirectional signal with one of the plurality of second antennas;
- configuring the first transceiver to receive the uplink omnidirectional signal;
- obtaining second received signals by processing the downlink omnidirectional signal from the plurality of second antennas,
- generating a plurality of transmitting array responses corresponding to transmitting angles in the determined range of angle, respectively;
- estimating an angle of departure (AoD) by executing an AoD estimating algorithm, wherein the AoD estimating algorithm comprising:
- obtaining dot products of the plurality of transmitting array responses and the second received signals, respectively;
- and
- selecting one of the transmitting angles corresponding to a maximum value among the obtained dot products as the AoD;
- and
- obtaining a channel matrix according to the estimated AoA, the channel complex gain, and the estimated AoD.
21 more elements
A channel estimation method, comprising:
- configuring a plurality of first antennas of a first transceiver to transmit a downlink omnidirectional signal with one of the plurality of first antennas, wherein the first transceiver further includes a first baseband circuitry;
- configuring a plurality of second antennas of a second transceiver to receive the downlink omnidirectional signal, wherein the second transceiver further includes a RF chain circuit coupled to the plurality of first antennas, and a second baseband circuitry coupled to the RF chain circuit;
- configuring the first baseband circuitry and the second baseband circuitry to estimate channels by performing the following steps:
- obtaining first received signals by processing the downlink omnidirectional signal from the plurality of second antennas,
- generating a plurality of receiving array responses corresponding to receiving angles in a determined range of angle, respectively;
- estimating an angle of arrival (AoA) by executing an AoA estimating algorithm, wherein the AoA estimating algorithm comprising:
- obtaining dot products of the plurality of receiving array responses and the first received signals, respectively;
- and
- selecting one of the receiving angles corresponding to a maximum value among the obtained dot products as the AoA;
- using a parameter-separated model to obtain channel complex gains from the first received signals;
- providing long-term statistic information associated to the channel complex gains according to structural parameters of the second transceiver;
- establishing a Bayesian Linear Estimator to estimate the channel complex gain;
- configuring the second transceiver to transmit an uplink omnidirectional signal with one of the plurality of second antennas;
- configuring the first transceiver to receive the uplink omnidirectional signal;
- obtaining second received signals by processing the downlink omnidirectional signal from the plurality of second antennas,
- generating a plurality of transmitting array responses corresponding to transmitting angles in the determined range of angle, respectively;
- estimating an angle of departure (AoD) by executing an AoD estimating algorithm, wherein the AoD estimating algorithm comprising:
- obtaining dot products of the plurality of transmitting array responses and the second received signals, respectively;
- and
- selecting one of the transmitting angles corresponding to a maximum value among the obtained dot products as the AoD;
- and
- obtaining a channel matrix according to the estimated AoA, the channel complex gain, and the estimated AoD.
19 more elements
Dependencies are inferred from the claim text.