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
Sama seperti sistem pemultipleksan pembahagian frekuensi ortogon (OFDM), akses berbilang pembahagian frekuensi ortogon (OFDMA) terdedah kepada offset frekuensi pembawa (CFO). Memandangkan CFO setiap pengguna adalah berbeza, pampasan CFO dalam pautan atas OFDMA adalah lebih terlibat daripada dalam sistem OFDM. Telah ditunjukkan bahawa kaedah pampasan pemaksaan sifar (ZF) adalah ubat yang mudah tetapi berkesan; namun, ia memerlukan penyongsangan matriks yang besar dan kerumitan pengiraan boleh menjadi sangat tinggi. Baru-baru ini, kami telah membangunkan kaedah lelaran kerumitan rendah untuk mengurangkan masalah ini. Dalam makalah ini, kami mempertimbangkan aspek teori algoritma. Kami secara khusus menganalisis nisbah isyarat-ke-gangguan-tambah-bunyi (SINR) algoritma keluaran. Dua pendekatan digunakan untuk analisis; satu mudah tetapi dianggarkan, dan satu lagi rumit tetapi tepat. Masalah penumpuan juga dibincangkan. Sebagai tambahan kepada analisis, kami mencadangkan kaedah pra-pampasan (PC) untuk meningkatkan prestasi algoritma. Simulasi menunjukkan bahawa analisis kami adalah tepat dan kaedah PC adalah berkesan.
The copyright of the original papers published on this site belongs to IEICE. Unauthorized use of the original or translated papers is prohibited. See IEICE Provisions on Copyright for details.
Salinan
Chao-Yuan HSU, Wen-Rong WU, "Performance Analysis of a Low-Complexity CFO Compensation Scheme for OFDMA Uplink" in IEICE TRANSACTIONS on Communications,
vol. E92-B, no. 3, pp. 954-963, March 2009, doi: 10.1587/transcom.E92.B.954.
Abstract: Similar to orthogonal frequency-division multiplexing (OFDM) systems, orthogonal frequency-division multiple access (OFDMA) is vulnerable to carrier frequency offset (CFO). Since the CFO of each user is different, CFO compensation in OFDMA uplink is much more involved than that in OFDM systems. It has been shown that the zero-forcing (ZF) compensation method is a simple yet effective remedy; however, it requires the inversion of a large matrix and the computational complexity can be very high. Recently, we have developed a low-complexity iterative method to alleviate this problem. In this paper, we consider the theoretical aspect of the algorithm. We specifically analyze the output signal-to-interference-plus-noise-ratio (SINR) of the algorithm. Two approaches are used for the analysis; one is simple but approximated, and the other is complicated but exact. The convergence problem is also discussed. In addition to the analysis, we propose a pre-compensation (PC) method enhancing the performance of the algorithm. Simulations show that our analysis is accurate and the PC method is effective.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E92.B.954/_p
Salinan
@ARTICLE{e92-b_3_954,
author={Chao-Yuan HSU, Wen-Rong WU, },
journal={IEICE TRANSACTIONS on Communications},
title={Performance Analysis of a Low-Complexity CFO Compensation Scheme for OFDMA Uplink},
year={2009},
volume={E92-B},
number={3},
pages={954-963},
abstract={Similar to orthogonal frequency-division multiplexing (OFDM) systems, orthogonal frequency-division multiple access (OFDMA) is vulnerable to carrier frequency offset (CFO). Since the CFO of each user is different, CFO compensation in OFDMA uplink is much more involved than that in OFDM systems. It has been shown that the zero-forcing (ZF) compensation method is a simple yet effective remedy; however, it requires the inversion of a large matrix and the computational complexity can be very high. Recently, we have developed a low-complexity iterative method to alleviate this problem. In this paper, we consider the theoretical aspect of the algorithm. We specifically analyze the output signal-to-interference-plus-noise-ratio (SINR) of the algorithm. Two approaches are used for the analysis; one is simple but approximated, and the other is complicated but exact. The convergence problem is also discussed. In addition to the analysis, we propose a pre-compensation (PC) method enhancing the performance of the algorithm. Simulations show that our analysis is accurate and the PC method is effective.},
keywords={},
doi={10.1587/transcom.E92.B.954},
ISSN={1745-1345},
month={March},}
Salinan
TY - JOUR
TI - Performance Analysis of a Low-Complexity CFO Compensation Scheme for OFDMA Uplink
T2 - IEICE TRANSACTIONS on Communications
SP - 954
EP - 963
AU - Chao-Yuan HSU
AU - Wen-Rong WU
PY - 2009
DO - 10.1587/transcom.E92.B.954
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E92-B
IS - 3
JA - IEICE TRANSACTIONS on Communications
Y1 - March 2009
AB - Similar to orthogonal frequency-division multiplexing (OFDM) systems, orthogonal frequency-division multiple access (OFDMA) is vulnerable to carrier frequency offset (CFO). Since the CFO of each user is different, CFO compensation in OFDMA uplink is much more involved than that in OFDM systems. It has been shown that the zero-forcing (ZF) compensation method is a simple yet effective remedy; however, it requires the inversion of a large matrix and the computational complexity can be very high. Recently, we have developed a low-complexity iterative method to alleviate this problem. In this paper, we consider the theoretical aspect of the algorithm. We specifically analyze the output signal-to-interference-plus-noise-ratio (SINR) of the algorithm. Two approaches are used for the analysis; one is simple but approximated, and the other is complicated but exact. The convergence problem is also discussed. In addition to the analysis, we propose a pre-compensation (PC) method enhancing the performance of the algorithm. Simulations show that our analysis is accurate and the PC method is effective.
ER -