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首页> 外文期刊>IEEE Journal of Solid-State Circuits >A GFSK demodulator for low-IF Bluetooth receiver
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A GFSK demodulator for low-IF Bluetooth receiver

机译：用于低中频蓝牙接收器的GFSK解调器

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摘要

An efficient mixed-mode Gaussian frequency-shift keying (GFSK) demodulator with a frequency offset cancellation circuit is presented. The structure is suitable for a low-IF Bluetooth receiver and can also be applied to other receivers involving continuous phase shift keying (CPSK) signals. The demodulator implementation is robust to tolerate process variations without requiring calibration. It can also track and cancel the time-varying local oscillator frequency offset between transmitter and receiver during the entire reception period. The chip was fabricated in CMOS 0.35-Μm digital process; it consumes 3 mA from a 3-V power supply and occupies 0.7 mm2 of silicon area. A 16.2-dB input signal-to-noise ratio is obtained to achieve 0.1% bit-error rate as specified in Bluetooth specs. The co-channel interference rejection ratio is about 11 dB. Theoretical and experimental results are in good agreement.
机译：提出了一种具有频偏抵消电路的高效混合模式高斯频移键控（GFSK）解调器。该结构适用于低IF蓝牙接收器，也可以应用于涉及连续相移键控（CPSK）信号的其他接收器。解调器的实现是鲁棒的，可以容忍过程变化而无需校准。它还可以在整个接收周期内跟踪和消除发射机和接收机之间随时间变化的本地振荡器频率偏移。该芯片采用CMOS0.35-μm数字工艺制造；它通过3 V电源消耗3 mA电流，并占用0.7 mm2的硅面积。获得了16.2 dB的输入信噪比，以实现蓝牙规范中指定的0.1％误码率。同信道干扰抑制比约为11 dB。理论和实验结果吻合良好。

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