Physical layer network coding is a promising technique for further improving spectral efficiency and network capacity of cooperative relay systems. OFDM is an efficient way to combat selective channel fading.In view of that, an orthogonal frequency division multiplexing-cooperative analog network coding (OFDMCANC)scheme is proposed, which uses network coding to improve the system spectral efficiency, and uses OFDM to cope with channel distortion. An optimal system power allocation method based on the scheme is also presented. Theoretical analysis and simulation results show that the proposed scheme can improve frequency selective fading of the channel.
WU Ai-ai1, ZHANG Zu-fan1,2, JIANG Hong-jun1
. Performance of OFDM-CANC in a Frequency-Selective Fading Channel[J]. Journal of Applied Sciences, 2013
, 31(4)
: 353
-360
.
DOI: 10.3969/j.issn.0255-8297.2013.04.004
[1] AHLSEDE R, CAI N, LI Y. Network information flow [J]. IEEE Transactions on Information Theory, 2000, 46 (4): 1204-1216．
[2] WIDMER J, FRAGOULI C, LE B. Low-complexity energy efficient broadcasting in wireless ad-hoc networks using network coding [C]// Workshop on Network Coding, Theory, and Application, Rivadel Garda, 2005．
[3] HO T, MEDARD M, RALF K. A random linear network coding approach to multicast [J]．IEEE Transactions on Information Theory, 2006, 52(10): 4413-4430.
[4] KATTI S, RAHUL H, HU W. XORs in the air：practical wireless network coding [J]. IEEE/ACM Transactions on Networking, 2008, 16(3): 497-510．
[5] KATTI S, GOLLAKOTA S S, KATABI D. Embracing wireless interference: analog network coding [C]//ACM SIGCOM 2007, Kyoto, Japan， 2007.
[6] SENDONARIS A, ERKIP E, ZHANG B. User cooperation diversity-part II: implementation aspects and performance analysis [J]. IEEE Transaction on Communications, 2003, 51(11): 1939-1948.
[7] LANEMAN N, TSE C, WORNELL W. Cooperative diversity in wireless networks: efficient protocols and outage behavior [J]. IEEE Transaction Information Theory, 2004, 50(12): 3062-3080.
[8] LU Hao, NIKOOKAR H, XU Tao. OFDM communication with cooperative relays [J]. Communications and Networking, 2010.
[9] POPOVSKI P, YOMO H. Wireless network coding by amplify-and-forword for bi-directional traffic flows [J]. IEEE Communications Letters, 2007, 11(1)：16-18.
[10] LEOW C Y, DING Z, LEUNG K K. On the study of analogue network coding for multi-pair, bidirectional relay channels [J]. IEEE Transactions on Wireless Communications, 2011, 10(2): 670-680.
[11] MARIC I, GOLDSMITH A, MEDARD M. Analog network coding in the high-SNR regime [C]// 2010 IEEE Wireless Network Coding Workshop，Bostn, USA, 2010
[12] SONG Lingyang, GUO Hong, LI Jiaobing. Joint relay selection and analog network coding using differential modulation in two-way relay channels [J]. IEEE Transactions on Vehicular Technology, 2010, 59(6): 2932-2939.
[13] GACANIN H, ADACHI F. Performance of physical layer network coding in a frequency-selective fading channel [C]// 20th IEEE International Symposium on PIMRC, 2009: 928-932.
[14] ANNAVAJJALA R, MAAREF A, ZHANG J. Multiantenna analog network coding for multihop wireless networks [J]. International Journal of Digital Multimedia Broadcasting, 2010 (2010), Article ID 368562.
[15] SANDELL M, BEEK J, BORJESSON O. Timing and frequency synchronization in OFDM systems using the cyclic prefix [C]//IEEE International Symposium Synchronization, Essen, Germany, 1995.
[16] DING Yan Wu, ZHANG Jian Kang, WONG Konmax. The amplify-and-forward half-duplex cooperative system: pairwise error probability and precoder design [J]. IEEE Transactions on Signal Processing, 2007, 55(2): 605-617.
