DSP BASED DIGITAL FM DEMODULATION FOR GMSK SIGNALS PDF

The present invention relates generally to the field of communications and particularly to real-time demodulation of a gaussian minimal shift keying GMSK signal. Increased demand for digitally encoded speech and data services in cellular radio communications has resulted in a more efficient use of the spectrum through the development of a number of new digital modulation techniques for use over mobile radio channels. Several of these spectrally efficient modulation techniques use coherent quadrature modulation that can achieve greater than one bit per hertz efficiency. The format of the data that is transmitted is illustrated in FIG.

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We'd like to understand how you use our websites in order to improve them. Register your interest. This so-called digital FM demodulation is followed by clock recovery, sampling, and thresholding. Conventionally, clock recovery is done in hardware, and matched filtering is usually not possible when the Gaussian pulse is wider than a bit duration. We propose a clock recovery technique based on discrete-time processing of the demodulated baseband signal.

This technique couples very nicely with a new maximum likelihood sequence estimator for the data that uses a whitening filter followed by a Viterbi decoder. Computer simulation results are presented to show that the new algorithm performs better than the conventional slicer by as much as 5. This is a preview of subscription content, log in to check access.

Rent this article via DeepDyve. Google Scholar. IEEE Trans. COM — Bell Syst. Download references. Reprints and Permissions. Ramamurthi, B. Sadhana 21, — Download citation. Issue Date : February Search SpringerLink Search. Immediate online access to all issues from Subscription will auto renew annually.

You can also search for this author in PubMed Google Scholar. View author publications. Rights and permissions Reprints and Permissions. About this article Cite this article Ramamurthi, B.

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