Error detection and error correction

• Error detection is the ability to detect the presence of errors caused by noise or other impairments during transmission from the transmitter to the receiver.
• Error correction is the additional ability to reconstruct the original, error-free data.

• Forward error correction (FEC): The transmitter encodes the data with an error-correcting code (ECC) and sends the coded message. The receiver never sends any messages back to the transmitter. The receiver decodes what it receives into the "most likely" data. The codes are designed so that it would take an "unreasonable" amount of noise to trick the receiver into misinterpreting the data.

Source: Wiki

1. Intuitive Guide to Principles of Communications-complextoreal
2. Introduction to Binary Convolutional Codes- Yunghsiang S. Han
3. On Woven Convolutional Codes-Stefan Höst (PdD Thesis)
   
4. Essentaial Coding Theory, Prof. Madhu Sudan
5. Algorithmic Information Theory, G J Chaitin
6. Complexity Issues in Coding Theory, Alexander Barg
7. Theory of Codes, Jean Berstel, Dominique Perrin, C. Reutenauer
8. Codes and Automata, Jean Berstel, Dominique Perrin, C. Reutenauer
9. A Tutorial on Convolutional Coding with Viterbi Decoding-Chip Fleming
10. Evaluation of Soft Output Decoding for Turbo Codes-Huang, Fu-hua
    
11. The Error Correcting Codes (ECC) (This site contains several computer programs that implement encoding and decoding routines of popular error correcting codes)
12. Error Bounds for Convolutional Codes and an Asymptotically Optimum Decoding Algorithm-ANDREW J. VITERBI
13. Codes and Decoding on General Graphs-Niclas Wiberg
14. Tutorials in Communications Engineering

Free web resources on free-space-optics

In telecommunications, Free Space Optics (FSO) is an optical communication technology that uses light propagating in free space to transmit data between two points. The technology is useful where the physical connection by the means of fibre optic cables is impractical, due to high costs or other considerations.The optical links are implemented using infrared laser light, although low-data-rate communication over short distances is possible using LEDs. IrDA is a very simple form of free-space optical communications.

Source:Wiki

1. Handbook of Optical Through the Air Communications, David A. Johnson
2. Wireless Infrared Communications- Kahn and Barry
3. Short-Range Optical Wireless Communications-O’Brien,Katz,Green
4. A Review on Indoor Optical Wireless Systems-Singh, John, FIETE
5. An introduction to Optical Wireless
6. Optical Wireless: The Story So Far-Heatley, Wisely, Neild, and Cochrane
7. Indoor Optical Wireless Communication Systems – Part I: Review- Z. Ghassemlooy
8. THE PHYSICS OF FREE-SPACE OPTICS -Scott Bloom
9. Free Space Optics, The Past, The Present & The Future-Dr. Willebrand
10. Analysis of Free Space Optics as a Transmission Technology - Garlington, Babbitt and Long
11. Common Misconceptions about Free Space Optics-fSona
12. Free Space optics (fso): An Introduction
13. What is Free Space Optics (FSO)
14. Overview : Free-Space Optical Communications at JPL/NASA- Hamid Hemmati
15. Overview of Laser Communication Research at JPL- Hamid Hemmati
16. Comparative Study of Optical and Radio-Frequency Communication Systems for a Deep-Space Mission -Hemmati,Wilson, Sue, Harcke,Wilhelm, Chen, Lesh, and Feria
17. IrDA Infrared Communications: An Overview- Megowan, Suvak, Knutson
18. Understanding the performance of free-space optics - Bloom,Korevaar, Schuster and Willebrand
19. Optical (through-the-air)communications
20. BIBLIOGRAPHY OF EARLY OPTICAL (AUDIO) COMMUNICATIONS -Chris Long and Mike Groth
21. Free-space optics technology improves situational awareness on the battlefield-Al-Akkoumi,Huck and Sluss
22. FREE SPACE OPTICS :High bandwidth solution in network world-MONIKA MEHRA
23. Multi-Gigabits-per-second Optical Wireless Communications - Dr. Jeganathan and Dr.Ionov
24. Challenges In Outdoor and Indoor Optical Wireless Communications -Qazi