Fractional Multi-bit Differential Detection Technique for Continuous Phase Modulation

ETRI Journal

关键词: GFSK;    differential detection;   

Others  :  1185002
DOI  :  10.4218/etrij.04.0103.0065

【 摘 要 】

A new low-complexity differential detection technique, fractional multi-bit differential detection (FMDD), is proposed in order to improve the performance of continuous phase modulation (CPM) signals such as Gaussian minimum shift keying (GMSK) and Gaussian frequency shift keying (GFSK). In comparison to conventional one-bit differential detected (1DD) GFSK, the FMDD-employed GFSK provides a signal-to-noise ratio advantage of up to 1.8 dB in an AWGN channel. Thus, the bit-error rate performance of the proposed FMDD is brought close to that of an ideal coherent detection while avoiding the implementation complexity associated with the carrier recovery. In the adjacent channel interference environment, FMDD achieves an even larger SNR advantage compared to 1DD.

   

【 参考文献 】

• [1]K. Murota and K. Hirade, "GMSK Modulation for Digital Mobile Radio Telephony," IEEE Trans. on Commun., vol. COM -29, July 1981, pp. 1044-1050.
• [2]C.-H. Park et al., "Channel Estimation and DC-Offset Compensation Schemes for Frequency-Hopped Bluetooth Networks," IEEE Commun. Lett., vol. 5, no. 1, Jan. 2001, pp. 4-6.
• [3]A. Abrardo, G. Benelli, and G.R. Cau, "Multiple-Symbol Differential Detection of GMSK for Mobile Comm.," IEEE Trans. on Veh. Technol., vol. 44, Issue: 3, Aug. 1995, pp. 379 -389.
• [4]A. Yongacoglu, D. Makrakis, and K. Feher, "Differential Detection of GMSK Using Decision Feedback," IEEE Trans. on Commun., vol. 36-6, June 1988, pp. 641 - 649.