Practical decentralized high-performance coordinated beamforming for both downlink and uplink in time-division duplex systems
| Autor: | I-Tai Lu, Enoch Lu |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Beamforming
Minimum mean square error Mean squared error Computer Networks and Communications Computer science Real-time computing Channel sounding Duplex (telecommunications) Computer Science Applications Signal Processing Telecommunications link Singular value decomposition Bit error rate Electronic engineering Interference alignment Communication channel |
| Zdroj: | EURASIP Journal on Wireless Communications and Networking. 2013 |
| ISSN: | 1687-1499 |
| Popis: | Coordinated beamforming (CBF) has been studied in hope of mitigating the inter-cell interference experienced by cell-edge users. Unfortunately, due to the limitations and/or impracticalities of the proposed designs, the expected performance gains have yet to be realized. Relying on channel soundings from the users and equivalent channel soundings from the cell sites (all on the same frequency), both downlink and uplink decentralized frameworks (and various example designs) are proposed in this paper for the practical transceiver and signaling design of a K-pair system desiring to employ CBF. Remarkably, the proposed singular value decomposition (SVD) example design for both frameworks is equivalent to a centralized interference alignment (IA) design. Furthermore, three other proposed design examples achieve better bit error rate, mean square error, and sum capacity performances than the proposed IA-equivalent SVD example design, respectively. In addition, higher sum capacities than the generalized iterative approach, a centralized minimum mean square error CBF design, are numerically observed. Clearly, practical CBF designs which can deliver the expected performance gains are finally available.a |
| Databáze: | OpenAIRE |
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