A novel class of binary zero-correlation zone sequence sets

Maeda, Takao; Kanemoto, Shigeru; Hayashi, Takafumi

doi:10.1109/tencon.2010.5686619

Cited by 15 publications

(17 citation statements)

References 10 publications

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“…Integers, p, po, pi, T, To, and Ti, are defined as p=piM+po (20) T= TIM+ To (21) L OSpo,To SM-1 (22) O:Ell Pi•, Ti Sll P-1 (23) OS p,TS PM -1 (24) In addition, an integer, E, is defined as follows: po =o 'RfnoM+po,fniM+po+To-EM (Tl + C) (29) Now, we consider the folloinring two cases.…”

Section: Proofmentioning

confidence: 99%

“…Tang et al proposed several types of binary A-ZCZ sequence sets [18], [20], and Hayashi et al proposed several types of binary and ternary A-ZCZ sequence sets [17], [22], [23], [25], [28], In addition, Hayashi et al proposed a method for constructing A-ZCZ sequence sets that can be regarded as optimal ZCZ sequence sets [26]. Zhang et al proposed complementary A-ZCZ sequence sets [21].…”

Section: Introductionmentioning

confidence: 99%

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Optimal Polyphase Asymmetric ZCZ Sequence Sets Including Uncorrelated Sequences

Torii

Matsumoto

Nakamura

2012

Journal of Signal Processing

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The present paper proposes a new method for constructing polyphase asymmetric zerocorrelation zone (A-ZCZ) sequence sets using discrete Fourier transform (DFT) matrices and orthogonal codes. The proposed method can generate A-ZCZ sequence sets that cannot be obtained using known methods. The newly obtained A-ZCZ sequence sets include optimal ZCZ sequence sets. In addition, two arbitrary sequences that belong to different sequence subsets become uncorrelated sequences. The proposed method is expected to be usefu1 for reducing or avoiding inter-cell interference from adjacent cells in approximately synchronized code-division multiple-access (AS-CDMA) systems.

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Section: Proofmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimal Polyphase Asymmetric ZCZ Sequence Sets Including Uncorrelated Sequences

Torii

Matsumoto

Nakamura

2012

Journal of Signal Processing

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“…Each sequence set has specific ACF and CCF properties. ZCZ sequences have been proposed and studied in [9]- [13]. The objective of this paper is to investigate the performance of ZCZ sequences based on two criteria: PAPR and bit error rate (BER) in an MC-CDMA system.…”

Section: Introductionmentioning

confidence: 99%

Suitable Spreading Sequences for Asynchronous MC-CDMA Systems

Addad¹,

Djebbari²

2018

JTIT

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In order to meet the demand of high data rate transmission with good quality maintained, the multi-carrier code division multiple access (MC-CDMA) technology is considered for the next generation wireless communication systems. However, their high crest factor (CF) is one of the major drawbacks of multi-carrier transmission systems. Thus, CF reduction is one of the most important research areas in MC-CDMA systems. In addition, asynchronous MC-CDMA suﬀers from the eﬀect of multiple access interference (MAI), caused by all users active in the system. Degradation of the system’s bit error rate (BER) caused by MAI must be taken into consideration as well. The aim of this paper is to provide a comparative study on the enhancement of performance of an MC-CDMA system. The spreading sequences used in CDMA play an important role in CF and interference reduction. Hence, spreading sequences should be selected to simultaneously ensure low CF and low BER values. Therefore, the eﬀect that correlation properties of sequences exert on CF values is investigated in this study. Furthermore, a numerical BER evaluation, as a function of the signal-to-noise ratio (SNR) and the number of users, is provided. The results obtained indicate that a trade-oﬀ between the two criteria is necessary to ensure good performance. It was concluded that zero correlation zone (ZCZ) sequences are the most suitable spreading sequences as far as the satisfaction of the above criteria is concerned.

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“…Sets of sequences having ideal correlation properties, impulse-like autocorrelation, and zero cross-correlation functions in a specified zone are called zero-correlation zone (ZCZ) sequences [1]. ZCZ codes have been employed in diverse wireless systems, such as sonar sensor network, multiple input multiple output, orthogonal frequency division multiplexing, local positioning systems, and ultrasonic imaging [2][3][4][5][6][7]. The requirements for the ZCZ sequence set used in a specific system vary with the design and purpose of the system.…”

Section: Introductionmentioning

confidence: 99%

“…The requirements for the ZCZ sequence set used in a specific system vary with the design and purpose of the system. Therefore, the availability of various types of construction methods makes it easier to select proper ZCZ sets for particular systems [7].…”

Section: Introductionmentioning

confidence: 99%