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A Rotator and Synthesizer Driven (RSD) frequency pre-calibration technique is proposed in this paper for the wireless body area network applications. To overcome the large Carrier Frequency Offset (CFO) and Sampling Clock Offset (SCO) due to a low-cost and low-precision reference clock, the CFO and SCO are estimated from the system downlink process. These estimated CFO and SCO values are provided to a rotator and a synthesizer for signal pre-processing. This RSD concept is evaluated in the proposed WiBoC OFDMA system. The tolerated CFO and SCO ranges are extended to 2.5x of existing wireless systems.
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