Abstract
Differential detection of continuous phase modulation suffers from significant intersymbol interference. To reduce bit error rate, multi-branch fractional multi-bit differential detection (MFMDD) with decision feed-back is proposed. By introducing decision feedback in multi-bit differential detected signals, severe inter-symbol interference can be removed. Simulation results show that the proposed structure can greatly im-proves the performance compared with MFMDD without decision feedback, and the performance of 9 FMDD is very near to the performance of the coherent detection.
Highlights
Continuous phase modulations make signal phase continuous by filtering the data sequence with smooth phase functions, such as Gaussian pulse, raised cosine pulse, leading to improved bandwidth efficiency
Simulation results show that the proposed structure can greatly improves the performance compared with multi-branch fractional multi-bit differential detection (MFMDD) without decision feedback, and the performance of 9 Fractional Multi-bit Differential Detection (FMDD) is very near to the performance of the coherent detection
Reference [10] generalized FMDD to a Multi-branch Fractional Multi-bit Differential Detection (MFMDD), the principle of MFMDD is presented from the physical meaning of phase forming, and theoretical analysis to the upper bound of the fractional bit duration for the maximum performance improvement is given
Summary
Continuous phase modulations make signal phase continuous by filtering the data sequence with smooth phase functions, such as Gaussian pulse (for Gaussian minimum shift keying and Gaussian frequency shift keying), raised cosine pulse, leading to improved bandwidth efficiency. Multi-symbol differential detection is proposed to greatly improve the system performance by using the memory in CPM [5,6,7]. When FMDD is applied to GFSK used in Bluetooth systems, a SNR advantage up to 1.8 dB can be achieved compared with the conventional one-bit differential detection (1DD). Reference [10] generalized FMDD to a Multi-branch Fractional Multi-bit Differential Detection (MFMDD), the principle of MFMDD is presented from the physical meaning of phase forming, and theoretical analysis to the upper bound of the fractional bit duration for the maximum performance improvement is given. The bit error rate (BER) performance is nearer to that of coherent detector while carrier recovery is avoided. Computer simulation results for evaluating the BER performance are presented
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
