Open AccessProceedings Article
Limits for CPM signals representation by walsh functions
TLDR
This paper explores the feasible limits for complexity reduction of a very simple front-end block for the calculus of phase transition metrics on a continuous phase modulation (CPM) receiver and enables the reductiou of the matched filters or correlators to just two integrators, regardless of the CPM scheme.Abstract:
This paper explores the feasible limits for complexity reduction of a very simple front-end block for the calculus of phase transition metrics on a continuous phase modulation (CPM) receiver. A quasi-optimum receiver of very low complexity is attained by splitting the function of the optimum receiver bank filters in two blocks: calculus of projections coefficients on a low dimensional space of Walsh functions followed by simple matrix calculus. A sequence detection algorithm follows this block The presented approach enables the reductiou of the matched filters or correlators to just two integrators, regardless of the CPM scheme. Research ou the reduction limits of the space dimension is conducted using catastrophic Wary CPM schemes, taking advantage of their very low number of phase states. Performance of lREC h=1/2 16-ary scheme is for the fist time presented. A rule is defined concerning the number of Walsh functions that must be used. That outcome proves to be valid for two CPM schemes of high power gain. The receiver is tested under additive white gaussian noise (AWGN).read more
Citations
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Proceedings ArticleDOI
Assessment of a quasi-optimum very low complexity CPM receiver over flat Rayleigh fading
TL;DR: It is found that the geometric algorithm used to derive the metrics introduces robustness to phase synchronism errors, and all the outcomes prove to be valid for two proposed high power gain CPM schemes.
Journal ArticleDOI
Phase error resilience to I/Q mismatch of a simplified CPM receiver
TL;DR: In this article, the origin of the error resilience during the derivation of the metrics was analyzed, and it was shown that one of three reduced complexity blocks of a low complexity receiver relies on symmetries on signal's phase transitions.
The M-algorithm on the detection of CPM schemes on the minimum euclidian distance upper bound
TL;DR: In this paper, the impact of the M-algorithm on continuous phase modulation (CPM) detection is analyzed when replacing the common Viterbi algorithm (VA) on the maximum likelihood sequence detection (MLSD) block.
Proceedings Article
The M-algorithm on the detection of CPM schemes on the minimum euclidian distance upper bound
TL;DR: The impact of the M-algorithm on continuous phase modulation (CPM) detection is analyzed when replacing the common Viterbi algorithm (VA) on the maximum likelihood sequence detection (MLSD) block.
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DARP - A Digital Audio Reconfigurable Processor
TL;DR: This paper presents DARP, a novel digital audio signal re-configurable processor based on the low cost Spartan II XC2S200 FPGA device that can handle several tens of digital audio signals in parallel, and can be programmed and controlled by a host computer.
References
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Book
Digital Phase Modulation
TL;DR: The first text in bandwidth-efficient digital coded communication was published in this article, where the authors introduced the method of continuous phase modulation (CPM) coding, with full treatment of spectrum, minimum distance, trasnmitters and receivers.
Journal ArticleDOI
GMSK Modulation for Digital Mobile Radio Telephony
K. Murota,K. Hirade +1 more
TL;DR: In this article, a digital modulation for future mobile radio telephone services is proposed, and its fundamental properties are clarified with the aid of machine computation, and the constitution of modulator and demodulator is discussed from the viewpoints of mobile radio applications.
Journal ArticleDOI
Continuous Phase Modulation--Part I: Full Response Signaling
Tor Aulin,C.-E. Sundberg +1 more
TL;DR: Comparisons are made with minimum shift keying (MSK) and systems have been found which are significantly better in E_{b}/N_{0} for a large signal-to-noise ratio (SNR) without expanded bandwidth, and schemes with the same bit error probability as MSK but with considerably smaller bandwidth have also been found.
Journal ArticleDOI
Multi-h phase-coded modulation
I. Sasase,S. Mori +1 more
TL;DR: An overview of some recent results for multi-h phase-coded modulation (MHPM) schemes is provided, and MHPM combined with convolutional codes, asymmetric modulation indices, or nonuniform mapping are investigated.
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