A Least Bit Error Rate Adaptive Array for MultiLevel Modulations

Satoshi DENNO; Daisuke UMEHARA; Masahiro MORIKURA

doi:10.1587/transcom.E95.B.69

A Least Bit Error Rate Adaptive Array for MultiLevel Modulations

Satoshi DENNO, Daisuke UMEHARA, Masahiro MORIKURA

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This paper proposes an adaptive algorithm for adaptive arrays that minimizes the bit error rate (BER) of the array output signals in radio communication systems with the use of multilevel modulation signals. In particular, amplitude phase shift keying (APSK) is used as one type of multilevel modulations in this paper. Simultaneous non-linear equations that are satisfied by the optimum weight vector of the proposed algorithm are derived and used for theoretical analyze of the performance of the adaptive array based on the proposed algorithm. As a result of the theoretical analysis, it can be shown that the proposed adaptive array improves the carrier to interference ratio of the array output signal without taking advantage of the nulls. Furthermore, it is confirmed that the result of the theoretical analysis agrees with that of computer simulation. When the number of the received antenna is less than that of the received signals, the adaptive array based on the proposed algorithm is verified to achieve much better performance then that based on the least mean square (LMS) algorithm.

Publication: IEICE TRANSACTIONS on Communications Vol.E95-B No.1 pp.69-76

Publication Date: 2012/01/01

Publicized

Online ISSN: 1745-1345

DOI: 10.1587/transcom.E95.B.69

Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of ISAP2010)

Category: Radio Systems

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Satoshi DENNO, Daisuke UMEHARA, Masahiro MORIKURA, "A Least Bit Error Rate Adaptive Array for MultiLevel Modulations" in IEICE TRANSACTIONS on Communications, vol. E95-B, no. 1, pp. 69-76, January 2012, doi: 10.1587/transcom.E95.B.69.
Abstract: This paper proposes an adaptive algorithm for adaptive arrays that minimizes the bit error rate (BER) of the array output signals in radio communication systems with the use of multilevel modulation signals. In particular, amplitude phase shift keying (APSK) is used as one type of multilevel modulations in this paper. Simultaneous non-linear equations that are satisfied by the optimum weight vector of the proposed algorithm are derived and used for theoretical analyze of the performance of the adaptive array based on the proposed algorithm. As a result of the theoretical analysis, it can be shown that the proposed adaptive array improves the carrier to interference ratio of the array output signal without taking advantage of the nulls. Furthermore, it is confirmed that the result of the theoretical analysis agrees with that of computer simulation. When the number of the received antenna is less than that of the received signals, the adaptive array based on the proposed algorithm is verified to achieve much better performance then that based on the least mean square (LMS) algorithm.
URL: https://globals.ieice.org/en_transactions/communications/10.1587/transcom.E95.B.69/_p

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@ARTICLE{e95-b_1_69,
author={Satoshi DENNO, Daisuke UMEHARA, Masahiro MORIKURA, },
journal={IEICE TRANSACTIONS on Communications},
title={A Least Bit Error Rate Adaptive Array for MultiLevel Modulations},
year={2012},
volume={E95-B},
number={1},
pages={69-76},
abstract={This paper proposes an adaptive algorithm for adaptive arrays that minimizes the bit error rate (BER) of the array output signals in radio communication systems with the use of multilevel modulation signals. In particular, amplitude phase shift keying (APSK) is used as one type of multilevel modulations in this paper. Simultaneous non-linear equations that are satisfied by the optimum weight vector of the proposed algorithm are derived and used for theoretical analyze of the performance of the adaptive array based on the proposed algorithm. As a result of the theoretical analysis, it can be shown that the proposed adaptive array improves the carrier to interference ratio of the array output signal without taking advantage of the nulls. Furthermore, it is confirmed that the result of the theoretical analysis agrees with that of computer simulation. When the number of the received antenna is less than that of the received signals, the adaptive array based on the proposed algorithm is verified to achieve much better performance then that based on the least mean square (LMS) algorithm.},
keywords={},
doi={10.1587/transcom.E95.B.69},
ISSN={1745-1345},
month={January},}

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TY - JOUR
TI - A Least Bit Error Rate Adaptive Array for MultiLevel Modulations
T2 - IEICE TRANSACTIONS on Communications
SP - 69
EP - 76
AU - Satoshi DENNO
AU - Daisuke UMEHARA
AU - Masahiro MORIKURA
PY - 2012
DO - 10.1587/transcom.E95.B.69
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E95-B
IS - 1
JA - IEICE TRANSACTIONS on Communications
Y1 - January 2012
AB - This paper proposes an adaptive algorithm for adaptive arrays that minimizes the bit error rate (BER) of the array output signals in radio communication systems with the use of multilevel modulation signals. In particular, amplitude phase shift keying (APSK) is used as one type of multilevel modulations in this paper. Simultaneous non-linear equations that are satisfied by the optimum weight vector of the proposed algorithm are derived and used for theoretical analyze of the performance of the adaptive array based on the proposed algorithm. As a result of the theoretical analysis, it can be shown that the proposed adaptive array improves the carrier to interference ratio of the array output signal without taking advantage of the nulls. Furthermore, it is confirmed that the result of the theoretical analysis agrees with that of computer simulation. When the number of the received antenna is less than that of the received signals, the adaptive array based on the proposed algorithm is verified to achieve much better performance then that based on the least mean square (LMS) algorithm.
ER -