Search
4 articles for “turbo code”
-
Efficient Encoding And Decoding Block Turbo Codes
Abstract: A channel coding approach is performed to lower the noise and interference that erupted in the communication channel. There are indeed a myriad of alternative channel coding schemes that have been developed. Block and convolutional codes are the most prevalent. Turbo code is a new near-channel capacity error-correcting code that has been introduced recently. The information can be transmitted across the channel with a very low bit error rate using …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 9, Issue 1, 2022 · pp. 11–23 Read article
-
Comparison of Bit Error Rate and Interleaver in Coding Scheme
Abstract: The powerful channel coding schemes, namely, those based on turbo codes with different type of interleaver design and iterative scheme of decoding. The Shannon’s predictions to optimal codes would imply random like codes and intuitively implying that the decoding operation on these codes would be prohibitively complex in nature. A brief comparison of Turbo codes with different type interleaver will be given in this section, both in term of actual …
Published in Journal of Mechatronics and Automation · Vol. 7, Issue 1, 2020 · pp. 1–5 Read article
-
BER Performance Comparison of Coded Communication Systems under Different Turbulence Coditions of Free Space Optical Channel
Abstract: AbstractThe congestion and the limitations on bandwidths of the radio spectrum have posed a constraint for the growth of radio wireless systems. Wireless optical communication, also known as free space optical communication (FSO), is believed to be a long-term option for many wireless communication applications. Atmospheric turbulence is generally considered to be multiplicative noise source that reduces the capability of receiver to estimate the information contained in the modulated optical …
Published in Trends in Opto-electro & Optical Communication · Vol. 4, Issue 1, 2014 · pp. 1–6 Read article
-
Verilog Implementation of a Turbo Encoder and Decoder with MAP-Based Decoding
Abstract: The most significant achievement in coding theory is the turbo codes which are forward error correction codes developed in 1993. By using two simple recursive systematic convolutional codes in parallel we can achieve near-capacity performance in transmission system which was defined by Shannon-Fano. By using iterative decoding structure near-capacity performance is possible with a relatively easy decoding complexity, using a soft in soft out (SISO) maximum a posteriori (MAP) decoding …
Published in Journal of Semiconductor Devices and Circuits · Vol. 2, Issue 3, 2015 · pp. 19–24 Read article