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On the ensemble performance of turbo codes
Proceedings of IEEE International Symposium on Information Theory, 2002We derive the ensemble weight enumeration function of turbo-codes, where the ensemble is generated by a uniform choice over the interleaver and a uniform choice over the component codes from the set of time-varying recursive convolutional codes. This reduces the study of the performance of turbo-codes to a two parameter family, namely the interleaving ...
Telatar, E., Urbanke, R.
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2004
Publisher Summary This chapter deals with turbo codes, one of the most powerful types of forward-error-correcting channel codes. It discusses the underlying concepts and presents a description and comparison of the turbo codes used by the Universal Mobile Telecommunications System (UMTS) and cdma2000 third-generation cellular systems.
Jian Sun, Matthew C. Valenti
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Publisher Summary This chapter deals with turbo codes, one of the most powerful types of forward-error-correcting channel codes. It discusses the underlying concepts and presents a description and comparison of the turbo codes used by the Universal Mobile Telecommunications System (UMTS) and cdma2000 third-generation cellular systems.
Jian Sun, Matthew C. Valenti
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Proceedings. 2001 IEEE International Symposium on Information Theory (IEEE Cat. No.01CH37252), 2002
The multifold turbo coding, designed to provide multiple extrinsic estimates and LLRs on a bit basis during decoding iterations, is introduced. Component encoders accept various combinations of information segments, which are obtained by equally dividing the information block prior to encoding.
Tanriover, Cagri C. +3 more
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The multifold turbo coding, designed to provide multiple extrinsic estimates and LLRs on a bit basis during decoding iterations, is introduced. Component encoders accept various combinations of information segments, which are obtained by equally dividing the information block prior to encoding.
Tanriover, Cagri C. +3 more
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Turbo Codes and Turbo Equalization
2000Turbo codes, introduced by Berrou, et al.[Berrou et al., 1993] in 1993, provide large coding gain for the memoryless additive white Gaussian noise (AWGN) channel and bring the system performance to within 1 dB from the Shannon capacity limit [Shannon, 1948]. The superior performance soon caused turbo codes to receive intense study.
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Proceedings. 1998 IEEE International Symposium on Information Theory (Cat. No.98CH36252), 2002
This paper examines the performance of turbo-codes with non-identical component codes. We show that asymmetric turbo-codes provide good performance with respect to both the "error-floor" and the "pre-error-floor" regions of the bit error rate curve.
O.M. Collins +3 more
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This paper examines the performance of turbo-codes with non-identical component codes. We show that asymmetric turbo-codes provide good performance with respect to both the "error-floor" and the "pre-error-floor" regions of the bit error rate curve.
O.M. Collins +3 more
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On the performance of turbo codes [PDF]
IEEE Military Communications Conference. Proceedings. MILCOM 98 (Cat. No.98CH36201), 2002 The performance of the turbo code is sensitive to its code structure, which is made up of code rate, constraint length, tap connection, block size, interleaving pattern and number of decoding iterations. In this paper, mitigation techniques that can lower the error floor are adopted in both encoder and decoder.
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IEEE Transactions on Communications, 2001
This letter is concerned with a family of modified turbo-type codes, referred to as turbo-SPC (single parity check) codes. A technique based on the SPC code is introduced to replace puncturing for rate adjustment. A noticeable feature of the proposed scheme is the significantly reduced decoding complexity compared with the standard punctured turbo code.
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This letter is concerned with a family of modified turbo-type codes, referred to as turbo-SPC (single parity check) codes. A technique based on the SPC code is introduced to replace puncturing for rate adjustment. A noticeable feature of the proposed scheme is the significantly reduced decoding complexity compared with the standard punctured turbo code.
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Proceedings of the IEEE Information Theory Workshop, 2003
In this paper we investigate turbo coding for BLAST (Bell Labs layered space-time) by encoding single user data streams and transmitting the symbols in different antennas. At the receiver we adopt an MMSE nulling, incremental decoding and soft cancellation approach to decode the symbols.
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In this paper we investigate turbo coding for BLAST (Bell Labs layered space-time) by encoding single user data streams and transmitting the symbols in different antennas. At the receiver we adopt an MMSE nulling, incremental decoding and soft cancellation approach to decode the symbols.
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Performance Comparison of Punctured Turbo Codes and Multi Binary Turbo Codes
2007 International Symposium on Signals, Circuits and Systems, 2007In this paper we analyze the performance of punctured turbo codes (TCs) and punctured multi binary turbo codes (MBTCs) over additive white Gaussian noise (AWGN) channel in terms of Bit Error Rate (BER) and Frame Error Rate (FER). We consider the original TCs that consist of the parallel concatenation of two identical rate 1/2 recursive systematic ...
M.M. Nafornita +3 more
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Improved Low Complexity Hybrid Turbo Code: A Modified Turbo Code
2009 Second International Conference on Emerging Trends in Engineering & Technology, 2009Turbo Convolutional Codes (TCC) are excellent error correcting codes as they show near Shannon capacity performance in communication systems. However, Turbo decoders are computationally complex. Recently, a class of modified Turbo codes called Low Complexity Hybrid Turbo Codes (LCHTC) is proposed with Bit Error Rate (BER) which is almost same as that ...
Prakash D. Vyavahare, Archana Bhise
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