New Constructions of 16-QAM Periodic Complementary Sequences

Zeng, Fanxin; Zeng, Xiaoping; Zeng, Xiangyong; Zhang, Zhenyu; Xuan, Guixin

doi:10.1109/lcomm.2012.102612.121679

Cited by 26 publications

(3 citation statements)

References 10 publications

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“…. Hence, by multiplying 1/2 in the left-hand sides in (10) and (11), respectively, Eqs. (10) and ( 11) are reduced to…”

Section: Mappings From Binary Variables To Qam Symbolsmentioning

confidence: 99%

Mappings from Binary Variables to QAM Symbols and Improvement of Peak Envelope Power of OFDM Systems

Zeng¹,

Zhang²,

Qian³

2014

AMM

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This paper establishes a mapping relationship from independent binary variables to QAM symbols. By these proposed mappings square QAM constellation can be produced by binary signals rather than quaternary signals, which is advantageous to operation of those apparatuses driven only by binary signals. As one of applications of these presented mappings, we give an example to verify improvement of upper bounds of peak envelope power in an OFDM communication system employing QAM complementary sequences.

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“…. Hence, by multiplying 1/2 in the left-hand sides in (10) and (11), respectively, Eqs. (10) and ( 11) are reduced to…”

Section: Mappings From Binary Variables To Qam Symbolsmentioning

confidence: 99%

Mappings from Binary Variables to QAM Symbols and Improvement of Peak Envelope Power of OFDM Systems

Zeng¹,

Zhang²,

Qian³

2014

AMM

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“…The work is modeled with Verilog hardware description language and Xilinx ISE (9,10) . Low power wide area networks problems are solved through innovative applications developed in recent years, In this work turbo Frequency shift keying is implemented, this FSK outputs the constant envelope waveform (11)(12)(13) . In the fourth generation networks, orthogonal frequency division multiplexing employed with Turbo-Frequency shift keying to obtain the constant envelope of the output signal.…”

Section: Introductionmentioning

confidence: 99%

Minimization of power and area of digital modulator for cellular communication using cadence in 180nm, 90nm and 45nm CMOS technology

Usha¹,

Mahesh²

2020

IJST

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Background/Objectives: Low power modulators are most efficient for wireless communication. Quadrature Amplitude Modulation (QAM) is used widely for high data rate communication than BPSK and QPSK, since it carries more bits of information per symbol over the channel. The objective of this work is to minimize the power consumption and area utilization of 32-bit QAM modulator. Methods/Statistical analysis: In this work, three new procedures are introduced for 32QAM modulator. In the first approach, sine and cosine data generated using conventional technique are stored in ROM and the stored data is selected based on the input sequence to generate the output signal. This approach reduces the power consumption and area utilization. In the second approach, information bit stream is modulated with sine and cosine waves generated by iterative algorithm to minimize power and area requirement. In the third approach, booth multiplication algorithm is employed to generate QAM signal. This method of generating QAM signal consumes less power and area in comparison with the conventional modulator. The work is synthesized, analyzed, and compared in 180nm, 90nm and 45nm CMOS technology using Cadence software. Findings: In 180nm CMOS technology power consumption noticed is 60662.740nW, 617020.071nW and 133679.687nW with the proposed method1, method2 and method3 respectively. An Area utilized in 180nm CMOS technology is 1341µm2, 20746.757µm2, and 2754µm2 respectively in proposed 32QAM modulator with ROM, 32QAM modulator with proposed Iterative algorithm and 32QAM modulator with Booth multiplication algorithm. Novelty/Applications: The conventional 32QAM devours additional power and area. In this work area and power reduction is achieved with respect to the conventional method. The same work is carried out with 90nm and 45nm CMOS technology. Three novel approaches to 32QAM are proposed. The proposed work is synthesized, analyzed, tabulated and compared with conventional method and shown that power consumption and area utilization are minimum than compared to the conventional method.

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“…In mathematical relationship, aperiodic complementary sequence sets (frequently, called Golay complementary sequence sets) are a special case of periodic ones [3]. To the authors' best knowledge, QAM periodic complementary sequence sets (PCSSs) seem to be somewhat few, since the authors only found [13]- [16]. Hence, the authors will devote their own efforts to construction of QAM PCSSs.…”

Section: Introductionmentioning

confidence: 99%

QAM periodic complementary sequence sets based on binary mutually uncorrelated complementary sequence sets

Zeng¹,

Zhang²

2015

2015 IEEE International Conference on Signal Processing, Communications and Computing (ICSPCC)

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This paper focuses on investigation of periodic complementary sequence sets over quadrature amplitude modulation (QAM) constellation. We propose a method converting existing binary mutually uncorrelated complementary sequence sets (MUCSSs) into required sequence sets, and discuss family size of the resultant sequence sets. More clearly, the number of new sequence sets is an exponent of period of sub-sequences. Hence, our method can provide a large number of candidates for applications of CDMA or OFDM communication systems in elimination of multiple access interference (MAI) or reduction of peak envelope power(PEP), respectively.

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New Constructions of 16-QAM Periodic Complementary Sequences

Cited by 26 publications

References 10 publications

Mappings from Binary Variables to QAM Symbols and Improvement of Peak Envelope Power of OFDM Systems

Mappings from Binary Variables to QAM Symbols and Improvement of Peak Envelope Power of OFDM Systems

Minimization of power and area of digital modulator for cellular communication using cadence in 180nm, 90nm and 45nm CMOS technology

QAM periodic complementary sequence sets based on binary mutually uncorrelated complementary sequence sets

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