100+ Map algorithm PowerPoint (PPT) Presentations, Map algorithm PPTs

Map algorithm - PowerPoint PPT Presentation

MAP decoding: The BCJR algorithm

MAP decoding: The BCJR algorithm. Maximum A posteriori Probability Bahl-Cocke-Jelinek-Raviv (1974) Baum-Welch algorithm (1963?)* Decoder inputs: Received sequence r (soft or hard) A priori L-values L a ( u l ) = ln( P ( u l =1)/ P ( u l =0) ) Decoder outputs

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261 views • 25 slides

III. Turbo Codes

III. Turbo Codes. An Example of MAP Algorithm. -1-1. -1-1. -1-1. -1-1. -1-1. s 0 (0 0). 11. 11. 11. 11. 11. 11. s 1 (1 0). -1-1. 1-1. 1-1. 1-1. s 2 (0 1). -1 1. -1 1. -1 1. -1 1. s 3 (1 1). 1-1.

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330 views • 20 slides

III. Turbo Codes

III. Turbo Codes. Summary MAP Algorithm. Forward Recursive Equation. Backward Recursive Equation. Iterative Decoding Principles. Note that. Iterative Decoding Principles. Iterative Decoding Principles. Iterative Decoding Principles. Define. Iterative Decoding Principles.

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410 views • 17 slides

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Map algorithm - PowerPoint PPT Presentation

MAP decoding: The BCJR algorithm

III. Turbo Codes

III. Turbo Codes