Multiple interleavers for modified Turbo codes

Bhise, Archana; Vyavahare, Prakash D.

doi:10.1109/wcsn.2009.5434787

Cited by 3 publications

(5 citation statements)

References 16 publications

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“…ILCHTC with concatenation of several constituent codes requires multiple two stage interleavers. Here, T constituent encoders require T‐1 interleavers . Iterative decoding strategy of multidimensional concatenated code is used for decoding of bits in ILCHTC and it consists of T decoding modules .…”

Section: Modified Turbo Codesmentioning

confidence: 99%

“…Here, T constituent encoders require T-1 interleavers. 12,13 Iterative decoding strategy of multidimensional concatenated code is used for decoding of bits in ILCHTC and it consists of T decoding modules. 15 The first decoding module consists of SISO decoding of convolutional codes 16,17 and zigzag codes followed by only zigzag codes.…”

Section: Ofmentioning

confidence: 99%

“…For better error performance, interleaver with high value of spreading factor and dispersion is required as they play a vital role in Turbo codes. MTC uses two stage multiple interleavers, depending upon the number of modules . To store the interleaved pattern, two stage interleavers require large memory space and the time required to design this interleaver is more .…”

Section: Introductionmentioning

confidence: 99%

“…MTC uses two stage multiple interleavers, depending upon the number of modules. 12 To store the interleaved pattern, two stage interleavers require large memory space and the time required to design this interleaver is more. 13 Therefore, it is mandatory to design an area efficient high speed interleaver.…”

Section: Introductionmentioning

confidence: 99%

“…An Enhanced ILCHTC uses separate zigzag column encoders to encode the columns of odd rows and even rows of information bits and convolutional encoders to encode the I rows, respectively.Therefore, as separate zigzag encoders are used to encode odd rows and even rows column bits, the error convergence of Enhanced ILCHTC is better than that of ILCHTC.For better error performance, interleaver with high value of spreading factor and dispersion is required as they play a vital role in Turbo codes.MTC uses two stage multiple interleavers, depending upon the number of modules. 12 To store the interleaved pattern, two stage interleavers require large memory space and the time required to design this interleaver is more. 13 Therefore, it is mandatory to design an area efficient high speed interleaver.…”

mentioning

confidence: 99%

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A Novel Architecture of Modified Turbo Codes with an area efficient high speed interleaver

Ilango¹,

Chokkalingam²

2018

Concurrency and Computation

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Summary Modified Turbo Codes (MTC) is preferred over conventional Turbo Convolutional Codes (TCC) as they provide nearly the same performance but with the additional benefit of reduced decoding complexity. The Improved Low Complexity Hybrid Turbo Codes (ILCHTC) is a type of MTC, which achieves a Bit Error Rate (BER) performance near to Shannon's limit. This paper presents a high speed novel encoder structure called Enhanced ILCHTC and a high speed low power novel interleaver for the MTC and analyzes its BER performance. From the simulation results, it is observed that BER performance of Enhanced ILCHTC and ILCHTC with proposed interleaver is better and has high degree of error convergence and requires less than 50% of computations than TCC. From the synthesized results, it is observed that the computation time required to shuffle the bits by the proposed interleaver is 7.4% less than the time required by the existing interleaver. In addition, it is observed that the number of logic elements utilized by the proposed interleaver is 95, which is 8% less than the number of logic elements, utilized by the existing interleaver but the tradeoff is power, which is 1.63% more when compared to the existing interleaver. Thus, a high speed area efficient interleaver is proposed along with a novel encoder structure.

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Section: Modified Turbo Codesmentioning

confidence: 99%