Name
Title | ||
|---|---|---|
Outage behavior of slow fading channels with power control using noisy quantized CSIT |
Abstract | ||
|---|---|---|
The topic of this study is the outage behavior of multiple-antenna slow fading channels with quantized feedback and partial power control. A fixed-rate communication system is considered. It is known from the literature that with error-free feedback, the outage-optimal quantizer for power control has a circular structure. Moreover, the diversity gain of the system increases polynomially with the cardinality of the power control codebook. Here, a similar system is studied, but when the feedback link is error-prone. We prove that in the high-SNR regime, the optimal quantizer structure with noisy feedback is still circular and the optimal Voronoi regions are contiguous non-zero probability intervals. Furthermore, the optimal power control codebook resembles a channel optimized scalar quantizer (COSQ), i.e., the Voronoi regions merge with erroneous feedback information. Using a COSQ, the outage performance of the system is superior to that of a no-feedback scheme. However, asymptotic analysis shows that the diversity gain of the system is the same as a no-CSIT scheme if there is a non-zero and non-vanishing feedback error probability. |
Year | Venue | Keywords |
|---|---|---|
2008 | Clinical Orthopaedics and Related Research | power control,communication system,information theory,fading channel,asymptotic analysis,error probability |
Field | DocType | Volume |
Diversity gain,Control theory,Fading,Power control,Communication channel,Voronoi diagram,Quantization (signal processing),Asymptotic analysis,Mathematics,Codebook | Journal | abs/0804.0 |
Citations | PageRank | References |
5 | 0.46 | 13 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Siavash Ekbatani | 1 | 93 | 6.16 |
| F. Etemadi | 2 | 131 | 10.32 |
| Hamid Jafarkhani | 3 | 7037 | 695.30 |