A joint feedback reduction scheme using delta modulation for dynamic channel allocation in OFDMA systems

被引：4

作者：

Cho, Myeon-gyun

Seo, Woohyun

Hong, Daesik

机构：

[1] Samsung Elect Co Ltd, Telecommun R&D Ctr, Suwon 442600, South Korea

[2] Yonsei Univ, Informat & Telecommun Lab, Seoul 120749, South Korea

来源：

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | 2007年 / 6卷 / 01期

关键词：

orthogonal frequency division multiple access (OFDMA); dynamic channel allocation (DCA); feedback- information reduction;

D O I：

10.1109/TWC.2007.05107

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A novel feedback-reduction scheme is proposed for dynamic channel allocation (DCA) in OFDMA systems. Applying this delta-modulation (DM)-based scheme to the channel gain of adjacent subcarriers reduces the feedback information to I bit per subcarrier. Since this reduced feedback information can lead to performance degradation in a bit error rate (BER), a modified amplitude craving greedy (ACG) method and improved DM are jointly adopted to minimize the loss. Simulation results verify that the proposed scheme can decrease feedback information by a factor of 1/M while retaining performance comparable to the full feedback case, which requires M bits per subcarrier.

引用

页码：46 / 49

页数：4

共 7 条

[1]

CHEON H, P VTC 99, V1, P100

[2] INTELLIGIBILITY OF DELTA MODULATED SPEECH [J].

GERBER, SE .

IEEE TRANSACTIONS ON AUDIO AND ELECTROACOUSTICS, 1966, AU14 (02) :93-&

[3] Computationally efficient bandwidth allocation and power control for OFDMA [J].

Kivanc, D ;

Li, GG ;

Liu, H .

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 2003, 2 (06) :1150-1158

[4]

MECKING M, P ICC 2002, V3, P1419

[5]

NGUYEN H, VEH TECHN C 2004, V4, P1916

[6]

Wong CY, 1999, IEEE J SEL AREA COMM, V17, P1747, DOI 10.1109/49.793310

[7]

WONG CY, P VTC 1999 FALL, V2, P19

← 1 →