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Square Complex Orthogonal Designs with Low PAPR and Signaling Complexity [article]

Smarajit Das, B. Sundar Rajan
2008 arXiv   pre-print
Space-Time Block Codes from square complex orthogonal designs (SCOD) have been extensively studied and most of the existing SCODs contain large number of zero.  ...  The codes presented do not result in increased signaling complexity.  ...  . • We have exploited the combinatorial structure of the rows of the design in (1) to obtain the codes with low PAPR.  ... 
arXiv:0807.4128v1 fatcat:emf7siykiba7pedyw33z7y32u4

A Low Complexity Iterative SLM-OFDM for SHF band applications

Sukanya. A. Kulkarni, B.K. Mishra
2017 Journal of Microwaves, Optoelectronics and Electromagnetic Applications  
In this paper, we propose iterative selective level mapping based on an orthogonal phase sequence set for PAPR reduction with reduced computation complexity.  ...  It is suggested that mean-square value of auto correlation be an additional measure to choose phase sequence set. Simulations are carried out to assess the PAPR and complexity reduction achieved.  ...  Ji,G.Ren and H. Zhang [5] have achieved low computational complexity by designing separate phase rotation vectors for data and pilotsymbols but PAPR performance has worsened.  ... 
doi:10.1590/2179-10742017v16i3819 fatcat:myqoy2snx5g3tcoeo4d7kbhona

Overview Of MC CDMA Papr Reduction Techniques

B Sarala
2012 International Journal of Distributed and Parallel systems  
To reduce PAPR the constraints are low power consumption, and low Bit Error Rate (BER). Spectral bandwidth is improved by better spectral characteristics, and low complexity/cost.  ...  High Peak to Average Power Ratio (PAPR) of the transmitted signal is a critical problem in multicarrier modulation systems (MCM) such as Orthogonal Frequency Division Multiplexing (OFDM), and Multi-Carrier  ...  Thus, if we reduce PAPR, we shall obtain reduced complexity of ADC and DAC, improved Signal to Noise Ratio (SNR) and BER [5, 6] , enhancement of bandwidth and battery life with low power consumption.  ... 
doi:10.5121/ijdps.2012.3217 fatcat:tfmvjw4wwzcsfatrhcxipmuury

Peak-to-Average Power Ratio Reduction for Wavelet Packet Modulation Schemes via Basis Function Design

Ngon Thanh Le, Siva D. Muruganathan, Abu B. Sesay
2008 2008 IEEE 68th Vehicular Technology Conference  
Furthermore, a 10-path channel with an exponentially decaying power delay profile and a root mean square delay spread of 50 ns is assumed.  ...  Depending on the values of T N′ and th PAPR chosen, the two low-complexity versions are shown to slightly reduced PAPR reduction performance (Baro & Ilow, 2007a) .  ...  allow connecting vehicles between each other and with the network.  ... 
doi:10.1109/vetecf.2008.235 dblp:conf/vtc/LeMS08 fatcat:4vmab26jk5fj3ooivvcrzvr25e

Peak-to-Average Power Ratio Reduction for Wavelet Packet Modulation Schemes via Basis Function Design [chapter]

Ngon Thanh, Siva D., Abu B.
2011 Vehicular Technologies: Increasing Connectivity  
Depending on the values of T N′ and th PAPR chosen, the two low-complexity versions are shown to slightly reduced PAPR reduction performance (Baro & Ilow, 2007a) .  ...  Furthermore, a 10-path channel with an exponentially decaying power delay profile and a root mean square delay spread of 50 ns is assumed.  ...  This book provides an insight on both the challenges and the technological solutions of several approaches, which allow connecting vehicles between each other and with the network.  ... 
doi:10.5772/16178 fatcat:2kesjsfnufgrpgo32zbzqswg7e

Parameter-adjustable piecewise exponential companding scheme for peak-to-average power ratio reduction in orthogonal frequency division multiplexing systems

Meixia Hu, Yongzhao Li, Yi Liu, Hailin Zhang
2014 IET Communications  
then complexity of system is increased .so we proposed a new technique using DCT that typically concentrate on reduction of PAPR & BER and also try to make our design less complex compare to pervious  ...  The principle behind these strategies is to transmit the OFDM signal with all-time low PAPR worth among variety of candidates all of that represent constant info. II.  ... 
doi:10.1049/iet-com.2013.0226 fatcat:2qzgrocug5cwbjxj4rpbsoaik4

A LOW-COMPLEXITY SIGNAL ADDITION METHOD FOR PAPR REDUCTION IN OFDM SYSTEMS

STEPHEN KIAMBI, ELIJAH MWANGI, GEORGE KAMUCHA
2020 INTERNATIONAL JOURNAL OF COMPUTER APPLICATION  
This paper proposes a fast-converging and low-complexity signal addition method for reducing the PAPR.  ...  The proposed method can achieve high PAPR reductions with only a small number of nonzero samples in the peakreducing signal without affecting the average power of the transmitted signal and at a small  ...  realisable methods with high PAPR reductions and low computational complexities.  ... 
doi:10.26808/rs.ca.i10v5.03 fatcat:zkajvwqlwffovmlcmmio667epu

PAPR Reduction in LTE Down Link using a Hybrid Repeated Clipping and SQRT Companding

Zainab S.Hadi, Buthaina M. Omran
2014 International Journal of Computer Applications  
The paper highlights the performance and advantages of the mixed technique. The simulations show that the proposed technique realizes an improved PAPR With acceptable BER.  ...  This paper presents a new hybrid peak-toaverage power ratio reduction technique, which repeated clipping and frequency domain filtering with SQRT companding over LET channel.  ...  But at the expense of increased complexity a little bit compares with just SQRT or just repeated clipping, but this technique still low complex compare with other PAPR techniques such as PTS, SLM, coding  ... 
doi:10.5120/17156-7209 fatcat:cjz2yybdsffqtinzkipkdp6swy

BER Analysis of OFDM Receiver Using MMSE Channel Estimation Method with PTS for Different Subblocks

M. Thanigasalam, P. Dananjayan
2013 International Journal of Computer and Electrical Engineering  
Modified PTS technique has reduced this computational complexity by using neighborhood search algorithm to find the optimum set of phase factors to reduce the PAPR of the OFDM signal.  ...  Simulation results show that BER increases with PAPR reduction.  ...  Then the time domain signal with lowest PAPR is given by 1 V v v v x b x     (6) where v b  is optimum set of phase factor which will produce a low PAPR OFDM signal.  ... 
doi:10.7763/ijcee.2013.v5.781 fatcat:biq4yx2ekfaajlhu6sro2gtpkm

Enhancing PAPR and Throughput for DFT-s-OFDM System Using FTN and IOTA Filtering

Xinran Zhuo, Jianxiong Pan, Huwei Wang, Xiangming Li, Neng Ye
2022 Sensors  
With high flexibility and low peak-to-average power ratio (PAPR), discrete Fourier transformation spreading-based orthogonal frequency division multiplexing (DFT-s-OFDM) can be a promising candidate waveform  ...  Simulation results show that the proposed waveform is capable of achieving good performance in PAPR, bit error rate (BER) and throughput, simultaneously, with 3.5 dB gain in PAPR and 50% gain in throughput  ...  Moreover, low-complexity iterative design to compact the ISI and ICI is also a promising direction.  ... 
doi:10.3390/s22134907 pmid:35808399 pmcid:PMC9269253 fatcat:x2z5b3mcafbohgr5ihn6d4rwnm

Modelling and Simulation of Pseudo-Noise Sequence-Based Underwater Acoustic OSDM Communication System

Lanjun Liu, Hao Zhao, Ming Li, Lin Zhou, Jiucai Jin, Jie Zhang, Zhichao Lv, Hui Ren, Jicun Mao
2019 Applied Sciences  
Orthogonal signal division multiplex (OSDM) is an emerging signal modulation technology which has a lower peak-to-average power ratio (PAPR) and a flexible subcarrier system architecture.  ...  On the basis of the PN sequence, a compressive sensing method based on the orthogonal matching pursuit (OMP) algorithm and the minimum mean square error (MMSE) algorithm is designed for channel estimation  ...  High PAPR has low signal energy utilization and short propagation range, while low PAPR has high signal energy utilization and long propagation range.  ... 
doi:10.3390/app9102063 fatcat:efg6fdzqtbd53bx7qdfsnwspgq

A novel construction of complex orthogonal designs with maximal rate and low-PAPR

Smarajit Das, B. Sundar Rajan
2009 2009 IEEE International Symposium on Information Theory  
Space-time block codes based on orthogonal designs are used for wireless communications with multiple transmit antennas which can achieve full transmit diversity and have low decoding complexity.  ...  In case of complex orthogonal designs (CODs), rate-1 codes exist only for 1 and 2 antennas.  ...  A code with low PAPR can be obtained from an existing code if some of its zeros are eliminated without increasing the signaling complexity [9] significantly.  ... 
doi:10.1109/isit.2009.5205623 dblp:conf/isit/DasR09 fatcat:pi22rkulvvabjmo5pbkt6uficu

The effects of HPA on OFDM system based on dual - tree complex wavelet transform (DTℂWT)

M H M Nerma, V Jeoti, N S Kamel
2010 2010 International Conference on Intelligent and Advanced Systems  
The need for CP is eliminated in the system design due to the good orthogonality and time frequency localization proprieties of the wavelet.  ...  The complementary cumulative distribution function (CCDF) of PAPR for the proposed scheme signal achieves about 3 dB improvement in PAPR over the traditional OFDM and WPM signals at 0.1% of CCDF.  ...  A high PAPR of the transmitted signals demands a very linear transmission path and limits the practical deployment of low-cost non-linear power amplifiers forcing them to operate with reduced power efficiency  ... 
doi:10.1109/icias.2010.5716173 fatcat:ptxk3zpx4vfq5kyxmnvow6jumq

Advances in single carrier block modulation with frequency domain processing

Yeheskel Bar-Ness, Fumiyuki Adachi, Naofal Al Dhahir, David D Falconer, Hikmet Sari
2012 EURASIP Journal on Advances in Signal Processing  
Besides its advantage of low PAPR, SC-BM technology has a similar performance/complexity to that of OFDMA, and simple frequency domain equalization methods for combating dispersive channels.  ...  They show how to exploit signal orthogonalization based on QR decomposition of the product of the channel and spreading code matrices in the frequency domain to obtain significant complexity reductions  ...  Besides its advantage of low PAPR, SC-BM technology has a similar performance/complexity to that of OFDMA, and simple frequency domain equalization methods for combating dispersive channels.  ... 
doi:10.1186/1687-6180-2012-85 fatcat:bwxyubtlsfg5vkcdumi74iyhs4

Low-Complexity PTS-Based Schemes for PAPR Reduction in SFBC MIMO-OFDM Systems

Sheng-Ju Ku
2014 IEEE transactions on broadcasting  
To minimize the PAPR, further energy compaction of signal and minimum autocorrelation of data input sequences are essential which will be give by discrete cosine transform.  ...  The Partial Transmit Sequence (PTS) is the technique that is distortion less which separates the sequences of input to the subsequences and selects minimize optimized PAPR in the signal to the transmission  ...  close to those of the oPTS and the co-PTS schemes, but with much lower computational complexity.  ... 
doi:10.1109/tbc.2014.2364966 fatcat:cmkv6zcmdregdohysti4t66ame
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