Performance Analysis of Simple Channel Feedback Schemes for a Practical OFDMA System

In this paper, we evaluate the tradeoff between the amount of uplink channel feedback information and the orthogonal frequency-division multiple access (OFDMA) downlink performance with opportunistic frequency-domain packet scheduling. Three candidate channel feedback schemes are investigated, including practical aspects, such as the effects of terminal measurement errors, bandwidth measurement granularity, quantization, and uplink signaling delays. The performance is evaluated by means of system-level simulations with detailed modeling of various radio resource-management algorithms, etc. Our results show that the optimal tradeoff between the channel feedback and the downlink OFDMA system performance depends on the radio channel frequency coherence bandwidth. We conclude that the so-called average best-M scheme is the most attractive channel feedback solution, where only the average channel quality for the best M subbands is reported, together with a bit mask identifying those subbands. The latter scheme only has a channel feedback word size in the range of 10-20 bits for the considered OFDMA system with 10-MHz bandwidth.

[1]  Preben E. Mogensen,et al.  HARQ Aware Frequency Domain Packet Scheduler with Different Degrees of Fairness for the UTRAN Long Term Evolution , 2007, 2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring.

[2]  Yeheskel Bar-Ness,et al.  A Comparison of Opportunistic Transmission Schemes with Reduced Channel Information Feedback in OFDMA Downlink , 2007, 2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications.

[3]  A. Sampath,et al.  On setting reverse link target SIR in a CDMA system , 1997, 1997 IEEE 47th Vehicular Technology Conference. Technology in Motion.

[4]  Björn E. Ottersten,et al.  Opportunistic Beamforming and Scheduling for OFDMA Systems , 2007, IEEE Transactions on Communications.

[5]  Markku J. Juntti,et al.  Performance Analysis of Downlink OFDMA Frequency Scheduling with Limited Feedback , 2008, 2008 IEEE International Conference on Communications.

[6]  Mamoru Sawahashi,et al.  Optimum Resource Block Bandwidth for Frequency Domain Channel-Dependent Scheduling in Evolved UTRA Downlink OFDM Radio Access , 2006, 2006 IEEE 63rd Vehicular Technology Conference.

[7]  Jonas Medbo,et al.  A Simplified Approach to Applying the 3GPP Spatial Channel Model , 2006, 2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications.

[8]  Hyung-Myung Kim,et al.  Opportunistic Feedback Assisted Scheduling and Resource Allocation in OFDMA Systems , 2006, 2006 10th IEEE Singapore International Conference on Communication Systems.

[9]  Jaap van de Beek.  WLC09-2: Channel Quality Feedback Schemes for 3GPP's Evolved-UTRA Downlink , 2006, IEEE Globecom 2006.

[10]  Young-June Choi,et al.  Selective channel feedback mechanisms for wireless multichannel scheduling , 2006, 2006 International Symposium on a World of Wireless, Mobile and Multimedia Networks(WoWMoM'06).

[11]  Björn E. Ottersten,et al.  Sub-carrier SNR estimation at the transmitter for reduced feedback OFDMA , 2006, 2006 14th European Signal Processing Conference.

[12]  Bernhard Raaf,et al.  Efficient channel quality feedback schemes for adaptive modulation and coding of packet data , 2004, IEEE 60th Vehicular Technology Conference, 2004. VTC2004-Fall. 2004.

[13]  Aria Nosratinia,et al.  Opportunistic dynamic subchannel allocation in multiuser OFDM networks with limited feedback , 2004, Information Theory Workshop.

[14]  Preben E. Mogensen,et al.  Performance of High-Speed Downlink Packet Access in Coexistence With Dedicated Channels , 2007, IEEE Transactions on Vehicular Technology.

[15]  Björn E. Ottersten,et al.  Using Unclaimed Sub-Carriers in Opportunistic OFDMA Systems , 2006, IEEE Vehicular Technology Conference.

[16]  Troels E. Kolding,et al.  Effects of Non-Ideal Channel Feedback on Dual-Stream MIMO-OFDMA System Performance , 2007, 2007 IEEE 66th Vehicular Technology Conference.

[17]  Brian K. Classon,et al.  Multi-User Scheduling for OFDM Downlink with Limited Feedback for Evolved UTRA , 2006, IEEE Vehicular Technology Conference.

[18]  Preben E. Mogensen,et al.  Performance of Downlink Frequency Domain Packet Scheduling for the UTRAN Long Term Evolution , 2006, 2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications.

[19]  J.H. Winters,et al.  Optimum combining in digital mobile radio with cochannel interference , 1984, IEEE Transactions on Vehicular Technology.

[20]  Angeliki Alexiou,et al.  Link performance models for system level simulations of broadband radio access systems , 2005, 2005 IEEE 16th International Symposium on Personal, Indoor and Mobile Radio Communications.

[21]  Preben E. Mogensen,et al.  Frequency Domain Scheduling for OFDMA with Limited and Noisy Channel Feedback , 2007, 2007 IEEE 66th Vehicular Technology Conference.

[22]  David Chase,et al.  Code Combining - A Maximum-Likelihood Decoding Approach for Combining an Arbitrary Number of Noisy Packets , 1985, IEEE Transactions on Communications.

[23]  T.E. Kolding,et al.  Low-Bandwidth Channel Quality Indication for OFDMA Frequency Domain Packet Scheduling , 2006, 2006 3rd International Symposium on Wireless Communication Systems.

[24]  Seokhyun Yoon,et al.  Orthogonal frequency division multiple access with an aggregated sub-channel structure and statistical channel quality measurement , 2004, IEEE 60th Vehicular Technology Conference, 2004. VTC2004-Fall. 2004.

[25]  Michael L. Honig,et al.  Performance of Limited Feedback Schemes for Downlink OFDMA with Finite Coherence Time , 2007, 2007 IEEE International Symposium on Information Theory.

[26]  Stefan Parkvall,et al.  Technical solutions for the 3G long-term evolution , 2006, IEEE Communications Magazine.

[27]  Alexander Golitschek Edler von Elbwart,et al.  Fairness and throughput analysis for generalized proportional fair frequency scheduling in OFDMA , 2005, 2005 IEEE 61st Vehicular Technology Conference.

[28]  Zhu Han,et al.  Low complexity resource allocation with opportunistic feedback over downlink OFDMA networks , 2008, IEEE Journal on Selected Areas in Communications.

[29]  Preben E. Mogensen,et al.  Baseline E-UTRA Downlink Spectral Efficiency Evaluation , 2006, IEEE Vehicular Technology Conference.