OFDMA uplink performance for interactive wireless broadcasting

A combination of orthogonal frequency division multiplexing (OFDM) with frequency-division multiple access (FDMA) called OFDMA is regarded as a promising solution for improving the performance of interactive wireless broadcasting systems. This work focuses on the performance of OFDM when used as a modulation and access technique for the uplink of an interactive wireless broadcasting system. In such an application, we present our investigations of the effects of symbol timing misalignments and peak-to-average power ratio (PAR). Under the condition of the same side information bits, the selective mapping (SLM) approach can be implemented by decimating OFDM samples, which is less complex compared to the ordinary SLM incurring a slight degradation of the PAR performance. Taking into account the effects of clipping operation and symbol timing misalignment, the bit error rate (BER) and throughput performances are investigated for a typical OFDMA uplink scenario.

[1]  Andrew R Nix,et al.  A comparison of the HIPERLAN/2 and IEEE 802.11a wireless LAN standards , 2002, IEEE Commun. Mag..

[2]  Nasir Ahmed,et al.  Discrete Time Signals and Systems , 1983 .

[3]  Jean-Yves Chouinard,et al.  Orthogonal frequency division multiple access peak-to-average power ratio reduction using optimized pilot symbols , 2000, WCC 2000 - ICCT 2000. 2000 International Conference on Communication Technology Proceedings (Cat. No.00EX420).

[4]  Victor V. Zyablov,et al.  Performance of a random OFDMA system for mobile communications , 1998, 1998 International Zurich Seminar on Broadband Communications. Accessing, Transmission, Networking. Proceedings (Cat. No.98TH8277).

[5]  Masahiro Morikura,et al.  New high-rate wireless LAN standards , 1999, IEEE Commun. Mag..

[6]  R. Bäuml,et al.  Reducing the peak-to-average power ratio of multicarrier modulation by selected mapping , 1996 .

[7]  Chintha Tellambura.  A coding technique for reducing peak-to-average power ratio in OFDM , 1998, IEEE GLOBECOM 1998 (Cat. NO. 98CH36250).

[8]  Young-Hwan You,et al.  A simple construction of OFDM-CDMA signals with low peak-to-average power ratio , 2003, IEEE Trans. Broadcast..

[9]  V. Roman,et al.  Broadband wireless access solutions based on OFDM access in IEEE 802.16 , 2002 .

[10]  Xiaodong Li,et al.  Effects of clipping and filtering on the performance of OFDM , 1998, IEEE Communications Letters.

[11]  J.B. Huber,et al.  A comparison of peak power reduction schemes for OFDM , 1997, GLOBECOM 97. IEEE Global Telecommunications Conference. Conference Record.

[12]  Mohamed El-Tanany,et al.  OFDM uplink for interactive broadband wireless: analysis and simulation in the presence of carrier, clock and timing errors , 2001, IEEE Trans. Broadcast..

[13]  Daesik Hong,et al.  Performance analysis of OFDMA uplink systems with symbol timing misalignment , 2003, IEEE Communications Letters.

[14]  Yung-Lyul Lee,et al.  Peak-to-average power ratio in MIMO-OFDM systems using selective mapping , 2003, IEEE Communications Letters.

[15]  Daesik Hong,et al.  Edge sidelobe suppressor scheme for OFDMA uplink systems , 2003, IEEE Commun. Lett..

[16]  Siavash M. Alamouti,et al.  A simple transmit diversity technique for wireless communications , 1998, IEEE J. Sel. Areas Commun..