Conference paper
Advanced Multimode Radio for Wireless & Mobile Broadband Communication
Distributed base station architectures represent the new trend that operators follow in order to resolve cost, performance and efficiency challenges when deploying 4G networks. Main components of such architectures are multimode radios capable of operating according to GSM, HSPA, WiMAX and LTE standards, known as remote radio heads (RRH).
The key feature of remote radio heads is the extended software configurability which enables the deployment of more flexible and energy-efficient radio solutions. This paper describes a modern multi-mode radio system reference architecture and the major digital building blocks that when combined together enable multi-mode and more power efficient operation.
It concentrates on blocks which can efficiently run multi-rate digital signal processing and blocks that increase radio power efficiency by linearizing the power amplifier output stage. The importance of a digital predistortion (DPD) block is emphasized and an adaptive polynomial approach based on cartesian to polar conversion is then proposed.
Such radio architecture has successfully been implemented on a low-cost FPGA family meeting the WiMAX/LTE spectrum and Error Vector Magnitude (EVM) requirements.
Language: | English |
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Publisher: | IEEE |
Year: | 2009 |
Pages: | 132-135 |
Proceedings: | European Wireless Technology Conference |
ISBN: | 1424447216 and 9781424447213 |
Types: | Conference paper |
4G mobile communication 4G networks Base stations Broadband communication Cartesian-polar conversion Computer architecture Costs Digital signal processing Energy efficiency GSM LTE Mobile communication Power amplifiers WiMAX WiMax adaptive polynomial advanced multimode radio broadband networks digital building block digital predistortion block digital signals distributed base station error vector magnitude field programmable gate arrays lowcost FPGA mobile broadband communication multirate digital signal processing remote radio head software configurability software radio telecommunication standards wireless broadband communication