SAR Image Speckle Filtering With Context Covariance Matrix Formulation and Similarity Test

2020 ◽  
Vol 29 ◽  
pp. 6641-6654
Author(s):  
Si-Wei Chen
Keyword(s):  
Covariance Matrix ◽  
Sar Image ◽  
Matrix Formulation ◽  
Similarity Test ◽  
Speckle Filtering

Speckle Filtering of Polarimetric SAR Image

2021 ◽  
pp. 323-346
Author(s):  
Ruliang Yang ◽  
Bowei Dai ◽  
Lulu Tan ◽  
Xiuqing Liu ◽  
Zhen Yang ◽  
...  
Keyword(s):  
Sar Image ◽  
Polarimetric Sar ◽  
Speckle Filtering

scholarly journals On the Reduction of Transmission Complexity in MIMO-WCDMA Frequency-Selective Fading Orientations via Eigenvalue Analysis

Electronics ◽  
2018 ◽  
Vol 7 (10) ◽  
pp. 239 ◽  
Author(s):  
P. Gkonis ◽  
D. Kaklamani ◽  
I. Venieris ◽  
C. Dervos ◽  
M. Chrysomallis ◽  
...  
Keyword(s):  
Covariance Matrix ◽  
Principal Component ◽  
Complexity Reduction ◽  
Data Matrix ◽  
Transmission Matrix ◽  
Selective Fading ◽  
Matrix Formulation ◽  
Frequency Selective Fading ◽  
Frequency Selective ◽  
Code Division Multiple

In this paper, a novel transmission strategy for Mutliple Input Multiple Output Wideband Code Division Multiple Access (MIMO-WCDMA) orientations operating in frequency-selective fading environments is investigated, in terms of overall algorithmic complexity reduction. To this end, Principal Component Analysis (PCA) is employed on the received data matrix, in order to define the significant terms that are taken into account during transmission matrix formulation. According to the presented results, feedback information of only the primary eigenvector of the corresponding covariance matrix of the received data matrix is required, in order to maintain the mean Bit Error Rate (BER) at acceptable levels. In particular, a complexity reduction of up to 10% can be achieved, when comparing BER values derived by the selection of all components of the received covariance matrix during transmission matrix formulation, and the corresponding BER when selecting half of the components. This reduction is maintained to 10%, when considering a realistic four-element antenna design; however, in this case mean BER inaccuracy is further reduced to 1%.

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