Novel 16-QAM and 64-QAM Near-Complementary Sequences with Low PMEPR in OFDM Systems
نویسندگان
چکیده
منابع مشابه
Construction of non-square M-QAM sequences with low PMEPR for OFDM systems - Communications, IEE Proceedings-
The author considers the use of coding to reduce the peak-to-mean envelope power ratio (PMEPR) for orthogonal frequency division multiplexing (OFDM) systems. Most of the existing schemes that use coding for PMEPR reduction assume a PSK constellation. The author presents the construction of non-square M-QAM symbols from a combination of QPSK and BPSK signals when M=2 and n is an odd number. By u...
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Orthogonal frequency-division multiplexing (OFDM) is a method of encoding digital data on multiple carrier frequencies. The data are sent over parallel sub-channels with each sub-channel modulated by a modulation scheme such as BPSK, QPSK, 16 QAM etc. The advantage of OFDM is its ability to cope with severe channel conditions compared to a single carrier modulation scheme but still maintaining ...
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We present two constructions of 16-QAM Golay complementary sequences. The size of the set of constructed sequences is (14 + 12m)(m!/2)4. Of these, when employed in an OFDM system, (m!/2)4 sequences have PMEPR (peak to mean envelope power ratio) bounded above by 3.6, three subsets of size (4+ 4m)(m!/2)4 contain sequences having PMEPRs less than of 2.8, 2.0, and 1.2 respectively, and a subset of ...
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A construction of hexagonal shaped 8-point QAM called H8QAM is shown. H8QAM constellation outperforms the conventional rectangular constellation and 8-PSK. Furthermore, construction of H8QAM Golay sequences having low peak-tomean envelope power ratios (PMEPR) from two QPSK Golay sequences is presented. Various upper bounds on peak envelope powers of these sequences are evaluated.
متن کاملGolay Complementary Sequences Over the QAM Constellation
In this paper,we present new constructions for M -QAM and 2M Q-PAM Golay complementary sequences of length 2 for integer n, where M = 2 for integer m. New decision conditions are proposed to judge whether the sequences with offset pairs proposed by Ying Li are Golay complementary, and with the new decision conditions, we prove the conjecture 1 and point out some drawbacks in conjecture 2 propos...
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ژورنال
عنوان ژورنال: IEEE Transactions on Communications
سال: 2016
ISSN: 0090-6778
DOI: 10.1109/tcomm.2016.2591949