Wirtinger Flow Meets Constant Modulus Algorithm: Revisiting Signal Recovery for Grant-Free Access

You are here

Top Reasons to Join SPS Today!

1. IEEE Signal Processing Magazine
2. Signal Processing Digital Library*
3. Inside Signal Processing Newsletter
4. SPS Resource Center
5. Career advancement & recognition
6. Discounts on conferences and publications
7. Professional networking
8. Communities for students, young professionals, and women
9. Volunteer opportunities
10. Coming soon! PDH/CEU credits
Click here to learn more.

Wirtinger Flow Meets Constant Modulus Algorithm: Revisiting Signal Recovery for Grant-Free Access

By: 
Carlos Feres; Zhi Ding

In this work, we analyze the convergence of constant modulus algorithm (CMA) in blindly recovering multiple signals to facilitate grant-free wireless access. The CMA typically solves a non-convex problem by utilizing stochastic gradient descent. The iterative convergence of CMA can be affected by additive channel noise and finite number of samples, which is a problem not fully investigated previously. We point out the strong similarity between CMA and the Wirtinger Flow (WF) algorithm originally proposed for Phase Retrieval. In light of the convergence proof of WF under limited data samples, we adopt the WF algorithm to implement CMA-based blind signal recovery. We generalize the convergence analysis of WF in the context of CMA-based blind signal recovery. Numerical simulation results also corroborate the analysis.

SPS on Twitter

  • The SPS Biomedical Imaging and Signal Processing Technical Committee Webinar Series continues on Tuesday, 6 Decembe… https://t.co/SYEEzoxIAK
  • SPS is close to reaching 20,000 members for the first time since 1995! Wouldn't that be a great way to kick off our… https://t.co/F2QMYmkW1W
  • The DEGAS Webinar Series continues on Wednesday, 30 November when Selin Aviyente presents "Single View and Multivie… https://t.co/07tgZXwcpK
  • CALL FOR PAPERS: The IEEE Transactions on Multimedia is accepting submissions for a Special Issue on When Multimedi… https://t.co/2sorOUwhLZ
  • SPS needs your support! is approaching. If our program receives 30 unique donations of US$10 or… https://t.co/hdxELXvKcK

SPS Videos


Signal Processing in Home Assistants

 


Multimedia Forensics


Careers in Signal Processing             

 


Under the Radar