Efficient acquisition algorithm for long pseudorandom sequence

Hsieh, Wan-Hsin; Chang, Chieh-Fu; Kao, Ming‐Seng

doi:10.1109/taes.2014.120460

Cited by 12 publications

(3 citation statements)

References 13 publications

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“…Each of the sequences in

are generated using

which fulfills the necessary condition mentioned in ( 6 ). The probability of the correct detection of

approaches unity at

dB, as mentioned in [ 36 ].…”

Section: Guard Intervalmentioning

confidence: 83%

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BER Reduction and Capacity Enhancement with Novel Guard Sequence Selection for Multi-Carrier Communication

Ologun

Shah

et al. 2022

Sensors

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Orthogonal frequency division multiplexing (OFDM) is an efficient multicarrier scheme that uses different types of guard intervals such as cyclic prefix (CP) and known symbol padding (KSP) (zero padding (ZP), unique word (UW), etc.) in block formation. Among these guard intervals, CP varies for each block, while other guard intervals remain fixed from block to block. These guard intervals efficiently perform channel estimation, synchronization and remove inter-block interference (IBI); nevertheless, none of the existing schemes develop any relationship between the guard interval (sequence) and the data symbols on different subcarriers of the OFDM block. We present a new idea of selecting the guard interval based on the data symbols of a subset of subcarriers in the block and exploit the high auto-correlation of the selected guard sequence to improve the bit error rate (BER) performance of the system. The results based on a fair comparison show that our enhanced orthogonal frequency division multiplexing (eOFDM) scheme inherits significant improvements in BER and the capacity of a multicarrier system as compared to the existing techniques.

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“…Each of the sequences in

are generated using

which fulfills the necessary condition mentioned in ( 6 ). The probability of the correct detection of

approaches unity at

dB, as mentioned in [ 36 ].…”

Section: Guard Intervalmentioning

confidence: 83%

“…It can be observed that eOFDM performs better than CP/TDS OFDM for the given range of SNR. This SNR gain is the result of the high probability of detection of

or G data symbols in the block, as mentioned in [ 36 ]. The SNR gain for the given BER is more prominent in Figure 6 .…”

Section: Numerical Resultsmentioning

confidence: 99%

BER Reduction and Capacity Enhancement with Novel Guard Sequence Selection for Multi-Carrier Communication

Ologun

Shah

et al. 2022

Sensors

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show abstract

“…However, the outputs of this generator are not entirely random. The generation of PN sequences plays a crucial role in the digital communication, cryptography, and computer game industries [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

FPGA implementation of orthogonal hyperchaotic sequences generator based on the CNN: application in multi-user chaotic communications

Fennouh,

Sadoudi,

Teguig

et al. 2023

Phys. Scr.

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In this article, we propose an efficient orthogonal hyperchaotic sequences generator for application in multi-user chaotic communication systems. The proposed generator consists of two blocks. The first block generates binary hyperchaotic sequences of varying lengths using a 6-Dimensional Cellular Neural Network (CNN) system, offering a wide range of sequence length choices. The second block uses an optimized selection method to generate multiple sets of orthogonal sequences with interesting correlation properties. The method is based on the balance and correlation properties, where zero cross-correlation between any two sequences is considered. A FPGA-based implementation of the proposed generator is presented. The hardware architecture is designed in VHDL and deployed on a Xilinx Virtex-6 FPGA ML605 evaluation kit. The generator is then analyzed and compared with the existing generator in terms of logic area consumption, throughput, latency, and randomness quality. The comparative analysis results show the effectiveness of the proposed generator, which can achieve a high throughput, low latency, and successfully pass all NIST statistical tests. Moreover, the generated orthogonal hyperchaotic sequences exhibit promising performance in a multi-user Differential Chaos Shift Keying (MU-DCSK) system, outperforming the Walsh-Hadamard sequences in terms of bit-error rate under various channel conditions.

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Role of Chaos in Spread Spectrum Communication

Kumar

Kalra

2019

International Conference on Intelligent Computing and Smart Communication 2019

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Efficient acquisition algorithm for long pseudorandom sequence

Cited by 12 publications

References 13 publications

BER Reduction and Capacity Enhancement with Novel Guard Sequence Selection for Multi-Carrier Communication

BER Reduction and Capacity Enhancement with Novel Guard Sequence Selection for Multi-Carrier Communication

FPGA implementation of orthogonal hyperchaotic sequences generator based on the CNN: application in multi-user chaotic communications

Role of Chaos in Spread Spectrum Communication

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