US 11,943,080 B2
Method for estimating dense multipath parameters by means of multipolarized broadband extended array responses
Haiming Wang, Suzhou (CN); Bensheng Yang, Suzhou (CN); Peize Zhang, Suzhou (CN); Chen Yu, Suzhou (CN); and Wei Hong, Suzhou (CN)
Assigned to Southeast University, Jiangsu (CN)
Appl. No. 17/611,179
Filed by Southeast University, Jiangsu (CN)
PCT Filed Mar. 17, 2021, PCT No. PCT/CN2021/081350
§ 371(c)(1), (2) Date Nov. 15, 2021,
PCT Pub. No. WO2022/016888, PCT Pub. Date Jan. 27, 2022.
Claims priority of application No. 202010721612.5 (CN), filed on Jul. 24, 2020.
Prior Publication US 2022/0311645 A1, Sep. 29, 2022
Int. Cl. H04L 12/50 (2006.01); H04L 25/02 (2006.01)
CPC H04L 25/0204 (2013.01) 5 Claims
OG exemplary drawing
 
1. A method for estimating dense multipath parameters by means of multipolarized broadband extended array responses, comprising following steps:
(1) transmitting multiple different transmitted signal sequences via a multipolarized antenna array, wherein a number of the transmitted signal sequences is equal to the number of transmitting antennas, each of the transmitted signal sequences is divided into different segments, a number of the segments in each of the transmitted signal sequences is not less than the number of the transmitting antennas, and a length of each of the segments of one of the transmitted signal sequence segments is not less than a number of Discrete Fourier Transform (DFT) points; and processing received data in multiple snapshots according to known transmitted signals, to obtain channel responses of multi-polarization components at all frequency points in a frequency band;
(2) vectorizing an obtained channel responses at the frequency points in each snapshot into a column vector, and arranging the channel responses in different snapshots into a two-dimensional matrix, wherein each column in the two-dimensional matrix is corresponding to a response in one of the multiple snapshots, and each row indicates a response of a certain receiving and transmitting array element pair at a certain frequency point in the multiple snapshots;
(3) estimating and acquiring a delay parameter regarding multipath propagation by using reference array elements; and
(4) selecting rows related to receiver reference array elements from the two-dimensional matrix described in step (2) to form a first matrix, selecting rows related to transmitter reference array elements to form a second matrix, reducing a dimensionality of a channel matrix of one of the first and second matrices by means of frequency domain smoothing, and estimating two-dimensional departure and arrival angles by using the channel matrix subjected to dimensionality reduction.