Platform-based Design of a Low Power MB-OFDM UWB Receiver Front-End
Yanmei Li, Chang-Ching Wu, Alberto L. Sangiovanni-Vincentelli and Jan M. Rabaey
The design of a multi-band OFDM ultra-wideband (MB-OFDM UWB) receiver is challenging when we target minimizing power consumption while providing enough robustness against the nearby wireless interference because of the complex tradeoffs that should be made to reach a satisfactory solution. A weak UWB signal has to be successfully processed in the presence of interference as strong as 60 dB above the UWB signal.
In general, a complex analog/RF design such as this is carried out by trial-and-error and is rarely optimized. In this project, we performed a systematic design space exploration of a UWB receiver front-end based on the principle of the Platform-Based Design (PBD) methodology. Our investigation was carried out on three levels of abstraction: system level, architecture level and circuit level. A stack of abstracted models were developed. Design optimization was efficiently performed using behavioral models at the system level while considering architectural constraints and implementation costs at the lower levels.
Finally, by mapping the system-level performance requirements to circuit-level platforms, we obtained a robust front-end design consuming 10.8 mW in a 0.13 µm CMOS technology, achieving a 22.3% savings of power compared to a manually optimized design.