tailieunhanh - Báo cáo hóa học: "Research Article On the Information Rate of Single-Carrier FDMA Using Linear Frequency Domain Equalization and Its Application for 3GPP-LTE Uplink"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: cResearch Article On the Information Rate of Single-Carrier FDMA Using Linear Frequency Domain Equalization and Its Application for 3GPP-LTE Uplink | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2009 Article ID 957159 11 pages doi 2009 957159 Research Article On the Information Rate of Single-Carrier FDMA Using Linear Frequency Domain Equalization and Its Application for 3GPP-LTE Uplink Hanguang Wu 1 Thomas Haustein EURASIP Member 2 and Peter Adam Hoeher3 1COO RTP PT Radio System Technology Nokia Siemens Networks St. Martin Street 76 81617 Munich Germany 2 Fraunhofer Institute for Telecommunications Heinrich Hertz Institute Einsteinufer 37 10587 Berlin Germany 3Faculty of Engineering University of Kiel Kaiserstrafe 2 24143 Kiel Germany Correspondence should be addressed to Hanguang Wu wuhanguang@ Received 31 January 2009 Revised 25 May 2009 Accepted 19 July 2009 Recommended by Bruno Clerckx This paper compares the information rate achieved by SC-FDMA single-carrier frequency-division multiple access and OFDMA orthogonal frequency-division multiple access where a linear frequency-domain equalizer is assumed to combat frequency selective channels in both systems. Both the single user case and the multiple user case are considered. We prove analytically that there exists a rate loss in SC-FDMA compared to OFDMA if decoding is performed independently among the received data blocks for frequency selective channels. We also provide a geometrical interpretation of the achievable information rate in SC-FDMA systems and point out explicitly the relation to the well-known waterfilling procedure in OFDMA systems. The geometrical interpretation gives an insight into the cause of the rate loss and its impact on the achievable rate performance. Furthermore motivated by this interpretation we point out and show that such a loss can be mitigated by exploiting multiuser diversity and spatial diversity in multi-user systems with multiple receive antennas. In particular the performance is evaluated in 3GPP-LTE uplink scenarios. Copyright 2009 Hanguang Wu et al. .