Results 41 to 50 of about 1,161,847 (185)
A Generalized Construction of OFDM M-QAM Sequences With Low Peak-to-Average Power Ratio
, 2009 A construction of $2^{2n}$-QAM sequences is given and an upper bound of the peak-to-mean envelope power ratio (PMEPR) is determined. Some former works can be viewed as special cases of this construction.Comment: published by Advances in Mathematics of ...
Feng, Rongquan +2 more
core +1 more source
Two novel nonlinear companding schemes with iterative receiver to reduce PAPR in multi-carrier modulation systems [PDF]
, 2006 Companding transform is an efficient and simple method to reduce the Peak-to-Average Power Ratio (PAPR) for Multi-Carrier Modulation (MCM) systems.
Guo, P, Jiang, T, Qu, D, Song, Y, Yao, W
core +1 more source
Peak-to-average power ratio reduction for OFDM modems [PDF]
The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring., 2004 A novel technique of reducing the peak-to-average power ratio (PAPR) of multi-carrier (MC) modulated signals is proposed. The method advocated is spectrally efficient, has a low implementational complexity and hence it is also suitable for low-power, portable implementation.
Akhtman, J., Bobrowski, B.Z., Hanzo, L.
openaire +2 more sources
CDMA signature sequences with low peak-to-average-power ratio via alternating projection [PDF]
, 2004 Several algorithms have been proposed to construct optimal signature sequences that maximize the sum capacity of the uplink in a direct-spread synchronous code division multiple access (CDMA) system.
Dhillon, Inderjit S. +3 more
core
Correlative coding with clipping and filtering technique in OFDM Systems [PDF]
, 2003 The major setbacks of Orthogonal Frequency Multiplexing (OFDM) is its peak-to-average power ratio (PAPR) and intercarrier interference (ICI). The occurrence of these factors restricts its application.
Fisal, Norsheila, Yusof, S. K.
core +1 more source
ICT Express, 2022 Orthogonal Frequency Division Multiplexing (OFDM) is the best choice for wireless and wired high data rate communications. The OFDM system has many advantages such as high spectral efficiency, robustness to channel fading, and immunity to impulse ...
Ahmed K. Abed +2 more
doaj +1 more source
A Two-Dimensional Signal Space for Intensity-Modulated Channels [PDF]
, 2012 A two-dimensional signal space for intensity- modulated channels is presented. Modulation formats using this signal space are designed to maximize the minimum distance between signal points while satisfying average and peak power constraints. The uncoded,
Agrell, Erik +3 more
core +2 more sources
Peak-to-Average Power Ratio Reduction of OTFS Based on Precoding DFT-Spread
IEEE AccessOrthogonal time frequency space (OTFS) modulation can effectively combat the multipath and Doppler effects in doubly-selective channels, making it suitable for high-speed mobility scenarios.
Haiqing Guan +4 more
doaj +1 more source
Peak-to-average power ratio of a Zipper signal [PDF]
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211), 2002 We investigate the peak-to-average power ratio (PAR) and its effects on the performance of Zipper-VDSL systems. The spectrum and the out of band power when passing through a nonlinear device is also investigated. We further evaluate the performance with a recently proposed PAR reduction technique for orthogonal frequency division multiplexing (OFDM ...
A.D.S. Jayalath, C. Tellambura
openaire +1 more source
, 2005 We enumerate the inequivalent self-dual additive codes over GF(4) of blocklength n, thereby extending the sequence A090899 in The On-Line Encyclopedia of Integer Sequences from n = 9 to n = 12.
A. Bouchet +10 more
core +1 more source