Achievable Information Rate Performance Comparison of Frequency-pilot-aided and Blind Carrier Phase Estimation Methods

2020 ◽  
Author(s):  
Zhiyuan Song ◽  
Koji Igarashi
Keyword(s):  
Carrier Phase ◽  
Performance Comparison ◽  
Estimation Methods ◽  
Information Rate ◽  
Phase Estimation ◽  
Rate Performance

scholarly journals Carrier phase estimation methods in coherent transmission systems influenced by equalization enhanced phase noise

2013 ◽  
Vol 293 ◽  
pp. 54-60 ◽  
Author(s):  
Tianhua Xu ◽  
Gunnar Jacobsen ◽  
Sergei Popov ◽  
Jie Li ◽  
Ari T. Friberg ◽  
...  
Keyword(s):  
Phase Noise ◽  
Carrier Phase ◽  
Estimation Methods ◽  
Phase Estimation ◽  
Transmission Systems ◽  
Coherent Transmission

A Spectrum-Adaptive Decomposition Method for Effective Atomic Number Estimation Using Dual Energy CT

2020 ◽  
Vol 2020 (14) ◽  
pp. 293-1-293-7
Author(s):  
Ankit Manerikar ◽  
Fangda Li ◽  
Avinash C. Kak
Keyword(s):  
Atomic Number ◽  
Decomposition Method ◽  
Traditional Approach ◽  
Effective Atomic Number ◽  
Dual Energy ◽  
Performance Comparison ◽  
Estimation Methods ◽  
Dual Energy Ct ◽  
Projection Data ◽  
X Ray

Dual Energy Computed Tomography (DECT) is expected to become a significant tool for voxel-based detection of hazardous materials in airport baggage screening. The traditional approach to DECT imaging involves collecting the projection data using two different X-ray spectra and then decomposing the data thus collected into line integrals of two independent characterizations of the material properties. Typically, one of these characterizations involves the effective atomic number (Zeff) of the materials. However, with the X-ray spectral energies typically used for DECT imaging, the current best-practice approaches for dualenergy decomposition yield Zeff values whose accuracy range is limited to only a subset of the periodic-table elements, more specifically to (Z < 30). Although this estimation can be improved by using a system-independent ρe — Ze (SIRZ) space, the SIRZ transformation does not efficiently model the polychromatic nature of the X-ray spectra typically used in physical CT scanners. In this paper, we present a new decomposition method, AdaSIRZ, that corrects this shortcoming by adapting the SIRZ decomposition to the entire spectrum of an X-ray source. The method reformulates the X-ray attenuation equations as direct functions of (ρe, Ze) and solves for the coefficients using bounded nonlinear least-squares optimization. Performance comparison of AdaSIRZ with other Zeff estimation methods on different sets of real DECT images shows that AdaSIRZ provides a higher output accuracy for Zeff image reconstructions for a wider range of object materials.

Modulation-Format-Independent Carrier Phase Estimation for Square M-QAM Systems

2013 ◽  
Vol 25 (11) ◽  
pp. 1073-1076 ◽  
Author(s):  
Yuliang Gao ◽  
Alan Pak Tao Lau ◽  
Chao Lu
Keyword(s):  
Carrier Phase ◽  
Phase Estimation ◽  
Modulation Format

scholarly journals Low-complexity feed-forward carrier phase estimation for M-ary QAM based on phase search acceleration by quadratic approximation

2015 ◽  
Vol 23 (15) ◽  
pp. 19142 ◽  
Author(s):  
Meng Xiang ◽  
Songnian Fu ◽  
Lei Deng ◽  
Ming Tang ◽  
Perry Shum ◽  
...  
Keyword(s):  
Carrier Phase ◽  
Low Complexity ◽  
Quadratic Approximation ◽  
Phase Estimation ◽  
Feed Forward

Improved pilot-aided optical carrier phase recovery using average processing for pilot phase estimation

2012 ◽  
Vol 18 (6) ◽  
pp. 480-484
Author(s):  
Fangzheng Zhang ◽  
Jian Wu ◽  
Yan Li ◽  
Jintong Lin
Keyword(s):  
Carrier Phase ◽  
Phase Estimation ◽  
Pilot Phase ◽  
Optical Carrier ◽  
Phase Recovery
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