Improved low complexity hybrid turbo codes and their performance analysis

Bhise, Archana; Vyavahare, Prakash D.

doi:10.1109/tcomm.2010.06.080507

Cited by 13 publications

(3 citation statements)

References 8 publications

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“…Finding expressions to evaluate the BER of systems employing turbo codes can become quite intricate. For this reason, several works have evaluated their BER based on simulations [36]- [39]. Moreover, in the literature, it is known that the number of iterations performed in the MAP detector directly affects the system performance.…”

Section: Turbo Codes Scenariomentioning

confidence: 99%

Performance Evaluation of Encoded Opportunistic Transmission Schemes

2019

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The performance of encoded opportunistic transmission schemes in wireless channels affected by Rayleigh fading and additive white Gaussian noise (AWGN) is analyzed. In opportunistic transmission, the information is transmitted only when the fading amplitude is above a threshold. For this, the receiver with the knowledge of the channel state information notifies the instants the transmitter should transmit. Opportunistic systems with convolutional error correcting codes or with trellis coded modulation are analyzed in terms of closed-form bit error rate (BER) expressions. Nevertheless, the approach presented can be employed with any kind of error correcting codes. Hence, the performance of turbo codes is also presented in the simulations. Monte Carlo simulations verify the accuracy of the derived expressions and provide insights on the system performance. Performance results show that uncoded and encoded opportunistic systems are superior to uncoded and encoded ordinary systems (non-opportunistic), respectively. In particular, the BER curves of the opportunistic system decay exponentially when the signal-to-noise ratio (SNR) increases. On the other hand, BER curves for ordinary transmission decay linearly, where the slope is proportional to the diversity that depends on the error correcting code. Thus, opportunistic systems require less SNR to guarantee the same BER of ordinary transmission. The BER gain increases as the SNR increases. It is also observed that uncoded opportunistic systems are even superior to encoded ordinary ones. The results are validated guaranteeing the same spectral efficiency for all the scenarios. Finally, due to the exponential decay of the BER curves, coding gain expressions, used in ordinary systems over AWGN, can be used as approximations for opportunistic transmission in fading channels. INDEX TERMS Wireless communication, opportunistic transmission, error correction codes, bit error rate, Rayleigh channels.

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Section: Turbo Codes Scenariomentioning

confidence: 99%

Performance Evaluation of Encoded Opportunistic Transmission Schemes

2019

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“…The power and efficiency will also increased due to BER and SNR as it effect the turbo decoder, less BER increase the efficiency [17][18] and decoding power. when less noise occur [19][20] the decoding is more effective communication [21], 4G.…”

Section: H Qam Demodulatormentioning

confidence: 99%

Constant Bit Error Rate based Turbo Decoder Model using APP Decoder and AWGN Channel

Kumar¹

2015

IJERT

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“…The overall decoding complexity of the iterative decoding algorithm for a concatenated code is lower than that required for a single code of the corresponding performance Interest in code concatenation has been renewed with the introduction of turbo codes [3], otherwise known as parallel concatenated convolutional codes (PCCCs) [4,7], and the closely related serially concatenated convolutional codes (SCCCs) [5,6], and [8]. In this paper, we introduce the parallel and serial concatenation codes as a references to compare with HCTC [9,10]. These codes perform well and yet have a low overall decoding complexity.…”

Section: Introductionmentioning

confidence: 99%

Performance of Hybrid Concatenated Trellis Codes CPFSK with Iterative Decoding over Fading Channels

Gergis¹

2011

IJDPS

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Abstract:Concatenation is a method of building long codes out of shorter ones, it attempts to meet the problem of decoding complexity by breaking the required computation into manageable segments. Concatenated Continuous Phase Frequency Shift Keying (CPFSK) facilitates powerful error correction. CPFSK also has the advantage of being bandwidth efficient and compatible with non-linear amplifiers. Bandwidth efficient concatenated coded modulation schemes were designed for communication over Additive White Gaussian noise (AWGN), and Rayleigh fading channels. An analytical bounds on the performance of serial concatenated convolutional codes (SCCC), and parallel concatenated convolutionalcodes (PCCC), were derived as a base of comparison with the third category known as hybrid concatenated trellis codes scheme (HCTC). An upper bound to the average maximum-likelihoodbit error probability of the three schemes were obtained. Design rules for the parallel, outer, and inner codes that maximize the interleaver's gain were discussed. Finally, a low complexity iterative decoding algorithm that yields a better performance is proposed.

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Improved low complexity hybrid turbo codes and their performance analysis

Cited by 13 publications

References 8 publications

Performance Evaluation of Encoded Opportunistic Transmission Schemes

Performance Evaluation of Encoded Opportunistic Transmission Schemes

Constant Bit Error Rate based Turbo Decoder Model using APP Decoder and AWGN Channel

Performance of Hybrid Concatenated Trellis Codes CPFSK with Iterative Decoding over Fading Channels

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