The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Sistem Orthogonal Frequency Division Multiplexing (OFDM) adalah salah satu daripada beberapa calon yang sesuai untuk digunakan dalam komunikasi wayarles jalur lebar. Walau bagaimanapun, disebabkan perambatan berbilang laluan, isyarat yang diterima mengalami pudar selektif frekuensi yang menyebabkan kemerosotan prestasi sistem yang ketara. Penerimaan kepelbagaian antena digunakan secara meluas untuk menyelesaikan masalah ini. Walau bagaimanapun, pendekatan ini tidak sesuai untuk pautan ke bawah, kerana ia meningkatkan kerumitan dan penggunaan kuasa stesen mudah alih (penerima). Dalam makalah ini, kami menganggap mod gelung tertutup menghantar kepelbagaian untuk OFDM, bukannya penerimaan kepelbagaian, untuk meningkatkan prestasi dalam pautan bawah. Stesen pangkalan (pemancar) mempunyai beberapa antena pemancar dan setiap antena ditimbang oleh faktor pemberat yang dikira berdasarkan maklumat maklum balas (FBI). Sistem ini adalah gelung tertutup, kerana FBI disalurkan semula daripada penerima. Kami mencadangkan skim penjanaan berat baharu dengan menggunakan korelasi antara subpembawa OFDM bersebelahan. Prestasi dinilai di bawah model saluran wayarles jalur lebar melalui simulasi komputer. Keputusan menunjukkan bahawa skim penjanaan berat yang dicadangkan mempamerkan prestasi yang lebih baik daripada skim penjanaan berat konvensional tanpa menambah bilangan bit FBI dalam pautan atas.
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Salinan
Shigenori UCHIDA, Takeo FUJII, Masao NAKAGAWA, "Closed-Loop Mode Phase Controlled Transmit Diversity for OFDM Using Difference Information of Phase Component among Adjacent Subcarriers" in IEICE TRANSACTIONS on Communications,
vol. E85-B, no. 3, pp. 573-581, March 2002, doi: .
Abstract: The Orthogonal Frequency Division Multiplexing (OFDM) system is one of several suitable candidates for use in broadband wireless communications. However, due to multipath propagation, the received signal suffers from frequency-selective fading which causes significant degradation of system performance. Antenna diversity reception is widely used to solve this problem. However, this approach is not suitable for the downlink, because it increases the complexity and power consumption of the mobile station (receiver). In this paper, we consider closed-loop mode transmit diversity for OFDM, instead of diversity reception, to improve the performance in the downlink. The base station (transmitter) has several transmit antennas and each antenna is weighted by a weighting factor calculated based on feedback information (FBI). This system is a closed loop, since the FBI is fed back from the receiver. We propose a new weight generation scheme by making use of the correlation between adjacent OFDM subcarriers. The performance is evaluated under a broadband wireless channel model by computer simulation. The results show that the proposed weight generation scheme exhibits better performance than the conventional weight generation scheme without increasing the number of the FBI bits in the uplink.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e85-b_3_573/_p
Salinan
@ARTICLE{e85-b_3_573,
author={Shigenori UCHIDA, Takeo FUJII, Masao NAKAGAWA, },
journal={IEICE TRANSACTIONS on Communications},
title={Closed-Loop Mode Phase Controlled Transmit Diversity for OFDM Using Difference Information of Phase Component among Adjacent Subcarriers},
year={2002},
volume={E85-B},
number={3},
pages={573-581},
abstract={The Orthogonal Frequency Division Multiplexing (OFDM) system is one of several suitable candidates for use in broadband wireless communications. However, due to multipath propagation, the received signal suffers from frequency-selective fading which causes significant degradation of system performance. Antenna diversity reception is widely used to solve this problem. However, this approach is not suitable for the downlink, because it increases the complexity and power consumption of the mobile station (receiver). In this paper, we consider closed-loop mode transmit diversity for OFDM, instead of diversity reception, to improve the performance in the downlink. The base station (transmitter) has several transmit antennas and each antenna is weighted by a weighting factor calculated based on feedback information (FBI). This system is a closed loop, since the FBI is fed back from the receiver. We propose a new weight generation scheme by making use of the correlation between adjacent OFDM subcarriers. The performance is evaluated under a broadband wireless channel model by computer simulation. The results show that the proposed weight generation scheme exhibits better performance than the conventional weight generation scheme without increasing the number of the FBI bits in the uplink.},
keywords={},
doi={},
ISSN={},
month={March},}
Salinan
TY - JOUR
TI - Closed-Loop Mode Phase Controlled Transmit Diversity for OFDM Using Difference Information of Phase Component among Adjacent Subcarriers
T2 - IEICE TRANSACTIONS on Communications
SP - 573
EP - 581
AU - Shigenori UCHIDA
AU - Takeo FUJII
AU - Masao NAKAGAWA
PY - 2002
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E85-B
IS - 3
JA - IEICE TRANSACTIONS on Communications
Y1 - March 2002
AB - The Orthogonal Frequency Division Multiplexing (OFDM) system is one of several suitable candidates for use in broadband wireless communications. However, due to multipath propagation, the received signal suffers from frequency-selective fading which causes significant degradation of system performance. Antenna diversity reception is widely used to solve this problem. However, this approach is not suitable for the downlink, because it increases the complexity and power consumption of the mobile station (receiver). In this paper, we consider closed-loop mode transmit diversity for OFDM, instead of diversity reception, to improve the performance in the downlink. The base station (transmitter) has several transmit antennas and each antenna is weighted by a weighting factor calculated based on feedback information (FBI). This system is a closed loop, since the FBI is fed back from the receiver. We propose a new weight generation scheme by making use of the correlation between adjacent OFDM subcarriers. The performance is evaluated under a broadband wireless channel model by computer simulation. The results show that the proposed weight generation scheme exhibits better performance than the conventional weight generation scheme without increasing the number of the FBI bits in the uplink.
ER -