Turbo codes enable reliable communication over power-constrained communication channels at close to Shannon's limit. Further, the performance of the communication system is enhanced by incorporating security mechanism. Security is described as the process of minimizing the vulnerabilities of assets or resources. National Institute of Standards and Technology (NIST) chose Rijndael algorithm...

A CGS is of the most important parts in natural gas transmission pipelines in which the high inlet natural gas (NG) pressure is reduced to much lower value by employing a throttling valve. This pressure drop causes hydrate forming, preventing stable NG flow through the pipeline. To prevent hydrate forming, NG is usually preheated by heaters which burns remarkable amount of NG. In this work, a n...

In this paper we present a modification of a typical turbo code to allow for the header bits to be decoded much faster than the other bits. This gives the decoder a possibility to discard data packets not addressed to it, and saves time and power since fewer iterations need to be performed to reliably decode the header. The proposed algorithm frequently terminates the first trellis of the turbo...

combined cycle performance can be improved by improving the performance of gas turbine based topping cycle. amongst various options the effective cooling of gas turbine blade for realizing the higher turbine inlet temperatures is one of the attractive options. the present paper deals with the thermodynam-ic analysis of advanced technology gas/steam combined cycle based power plant having closed...

Outer block interleaving improves the performance of turbo codes in correlated Rayleigh fading channels. The longer the outer interleaver, the better is the performance, with the penalty of more delay. Power could be saved by choosing the optimum interleaver for different operating environments. In this paper the four possible outer block interleaver lengths specified for 3GPP are examined for ...

Single carrier frequency division multiple access (SC-FDMA) is the access technique which is used in the long term evolution (LTE) uplink in order to reduce the peak-to-average power ratio (PAPR). The LTE uplink uses this technique in joint application with turbo coding and high order modulations to achieve peak data rates up to 86 Mbps within 20 MHz bandwidth. This paper introduces a semi anal...

In this paper we propose the use of Turbo Codes for M-ary pulse position modulated pulses over UWB communication channels with multipath. The transmitted power of the UWB pulses is required to be very small as they are used in the existing spectrum designated to other uses. This constraint requires that UWB signals have good performance at low SNR’s. Turbo codes have been shown to perform well ...

The very powerful turbo codes are the most recent breakthrough in coding theory. The implementation of the iterative turbo decoder however hampers their incorporation in real systems. We tackle this problem by optimizing the decoder on two levels: the separate decoder modules and the global decoder system. Our module level optimizations greatly reduce the decoding delay and energy. The main con...

Traditional Turbo-codes with binary phase-shift keying modulation assign equal noise margins to the Turbo-encoder output bits. It is shown that by using unequal power allocation (UPA) among the encoder output streams, one can improve the code performance especially for large block lengths. On the other hand, there has been a growing interest in the application of Turbo-codes for signaling over ...

In this paper, we examine turbo synchronization in the presence of carrier frequency uncertainties and phase offsets for the DVB–RCS standard. As turbo synchronization can only achieve high estimation accuracy if the initial parameter offset is sufficiently small, we employ a coarse synchronization unit for pre-compensation. Especially for frequency offset estimation, the position of known pilo...