Novel Intermediate Frequency Zero-Crossing Detectors for Bluetooth Enhanced Data Rate Transmission

In the recent years, Bluetooth has become an important short range transmission system which provides data rates up to 3 Mbit/s in its enhanced data rate mode (EDR). In this communication, the authors will illustrate low-cost intermediate frequency (IF) zero-crossing detector (ZXD) for Bluetooth EDR. The IF ZXD facilitates analog signal processing at low IF and the digitization is carried out by a simple comparator. Therefore, low-cost implementation of the receiver is readily at hand. Furthermore, it will be shown that the proposed IF ZXD for Bluetooth EDR facilitates a robust performance, approaching theoretical bounds in the case of single path transmission. The proposed design is flexible and improves earlier published receiver structures.