Characterisation of Bluetooth Carrier Frequency Errors

Robinson, C.; Purvis, A.

Abstract

Bluetooth, the short range wireless communications standard, operates in the unlicensed ISM frequency band at 2.4 GHz using Gaussian Frequency Shift Keying (GFSK) modulation. After a brief introduction to GFSK and FM demodulation, the paper describes the significant deteriorations in Bit Error Rate (BER) of the common Quadrature Detector GFSK demodulator, due to errors in transmitted centre frequency. The magnitudes of errors introduced into the carrier are within the limits imposed by the Bluetooth Radio Specification. Such increases in BER serve to highlight the importance of quantifying transmitter performance; the paper goes on to propose a new method of measuring carrier frequency errors in GFSK signals. This method is based upon the Phase-Shift Discriminator FM demodulation algorithm, and so is applicable to any signal that is essentially FM in nature.

Citation

Robinson, C., & Purvis, A. (2003). Characterisation of Bluetooth Carrier Frequency Errors.

• Conference Name: Proceedings of the 9th IEEE International Mixed Signal Testing Workshop (IMSTW’03)
• Conference Location: Seville, Spain
• Publication Date: 2003-06
• Publisher: Institute of Electrical and Electronics Engineers
• Pages: 119-124