A New Class of Polyphase Sequence Sets with Optimal Zero-Correlation Zones

Torii, Hideyuki; Nakamura, Makoto; Suehiro, N.

doi:10.1093/ietfec/e88-a.7.1987

Cited by 41 publications

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“…then a binary A-ZCZ sequence pair set U, V ( ) with the parameters Z A (48, [4,3], [3,7]) can be obtained from Section 3.2.2. In fact, the union sequence pair set U, V ( ) is a quasi-optimal conventional ZCZ sequence pair set with the parameters Z(48, 12, 3).…”

Section: Examplesmentioning

confidence: 99%

“…The concept of interleaved sequences was introduced by Gong [3], which can be used for the construction of ZCZ sequence and ZCZ sequence pair. In recent years, the designs of ZCZ sequence set and ZCZ sequence pair set have been researched based on interleaved technique and perfect sequence or sequence pair [4][5][6][7][8][9][10]. Recently, the ZCZ sequence set that was composed of multiple sequence subsets, which also is said as asymmetric ZCZ (A-ZCZ) sequence set, has been proposed and obtained [11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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Families of asymmetric sequence pair set with zero‐correlation zone via interleaved technique

2016

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Section: Examplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Families of asymmetric sequence pair set with zero‐correlation zone via interleaved technique

2016

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“…The ZCZ length is restricted by a mathematical upper bound [6], [16], and ZCZ sequence sets that satisfy this mathematical upper bound are referred to as optimal ZCZ sequence sets. A number of studies have evaluated optimal ZCZ sequence sets [1], [6], [11], [14], [15]. On the other hand, quasi-optimal ZCZ sequence sets' have a ZCZ length that is equal to one less than the mathematical upper bound.…”

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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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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“…Modulation schemes using these nonorthogonal codes are also forced to be subject to co‐channel interference and resultantly must perform complicated equalization . In contrast, ZCZ code is orthogonal even for shift correlation and requires only quasi‐timing synchronization to keep the orthogonality with the other sequences in the same code . ZCZ code is also capable of fast frame‐timing acquisition .…”

Section: Introductionmentioning

confidence: 99%

A ZCZ‐CDMA system with BFSK modulation

Huang

Matsufuji

Matsumoto

et al. 2012

Int J Communication

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SUMMARY A quasi‐timing synchronous code division multiple access (CDMA) system called ZCZ‐CDMA, which uses a set of sequences with a zero‐correlation zone called ZCZ code as a spreading code, is useful for short‐range wireless communications because of its excellent properties such as co‐channel interference‐free performance, simplified hardware design, and low transmit power as well as fast frame synchronization capability. In this paper, a ZCZ‐CDMA system with binary frequency‐shift keying (BFSK) modulation called BFSK‐ZCZ‐CDMA is proposed. This system is characterized by using a pair of balanced ZCZ codes for spreading and transmitting the two spread components over the respective keying carrier frequencies. Its bit error rate performance, compared with those of existing BPSK‐ZCZ‐CDMA, ASK‐ZCZ‐CDMA, and CDMA systems using the other spreading codes, is evaluated in theory and simulation. The bit error rate performance of the three ZCZ‐CDMA systems over additive white Gaussian noise and Rayleigh fading channels are formulated. It is proved that BFSK‐ZCZ‐CDMA is much more robust in anti‐fading performance and low transmit power in such an environment that fading distributions on the keying frequencies are independent mutually. Fading versus frequency characteristics are also investigated. Copyright © 2012 John Wiley & Sons, Ltd.

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A New Class of Polyphase Sequence Sets with Optimal Zero-Correlation Zones

Cited by 41 publications

References 0 publications

Families of asymmetric sequence pair set with zero‐correlation zone via interleaved technique

Families of asymmetric sequence pair set with zero‐correlation zone via interleaved technique

Optimal Polyphase Asymmetric ZCZ Sequence Sets Including Uncorrelated Sequences

A ZCZ‐CDMA system with BFSK modulation

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