Topic
Continuous phase modulation
About: Continuous phase modulation is a research topic. Over the lifetime, 3199 publications have been published within this topic receiving 37245 citations. The topic is also known as: CPM.
Papers published on a yearly basis
Papers
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01 Oct 2010TL;DR: The NATO tactical narrowband waveform (NBWF) is considered in this paper with particular attention to the characteristics and the performance of the NC3A functional reference software.
Abstract: The NATO tactical narrowband waveform (NBWF) is considered in this paper with particular attention to the characteristics and the performance of the NC3A functional reference software. We describe the relevant parts of the software focusing on the signaling scheme which is based on the serial concatenation of a convolutional code with a continuous phase modulation (CPM) through an interleaver. The proposed CPM receiver exploits an advanced soft-input soft-output detection algorithm which relies on a simplified CPM representation. It does not need to explicitly estimate the channel phase, and iteratively exchanges soft information with the outer decoder. The receiver performance will be assessed through computer simulations with reference to two modes: one robust mode that offers high range of coverage and a spectrally efficient one offering a higher throughput for a shorter coverage.
10 citations
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07 Aug 2002TL;DR: An MMSE approximation to Laurent's (1986) linear decomposition using an arbitrary number of filtered, linearly modulated pulses is proposed and capacity bounds for both white and colored noise channels with CPM modulation are derived.
Abstract: We derive upper bounds on the capacity of an additive Gaussian noise channel with continuous phase modulation (CPM). We propose an MMSE approximation to Laurent's (1986) linear decomposition using an arbitrary number of filtered, linearly modulated pulses. Using this linear modulation structure, we derive capacity bounds for both white and colored noise channels with CPM modulation by showing the system is equivalent to a multiple access channel (MAC) with intersymbol interference (ISI). The rate sum capacity of this cooperative MAC is used for the upper bound. Numerical results are presented for a channel using CPM with both white and colored noise. The bounds show a significant gap between a channel using CPM and a channel with unconstrained modulation.
10 citations
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10 Jun 2012
TL;DR: This paper addresses detailed waveform trade-offs for mesh satellite networks by considering spectral efficiency, resilience against non linear distortion, channel impairments and interference for both linear and continuous phase modulation schemes defined in the DVB-RCS2 standard.
Abstract: This paper addresses detailed waveform trade-offs for mesh satellite networks. The waveform analysis is carried out considering spectral efficiency, resilience against non linear distortion, channel impairments and interference for both linear and continuous phase modulation schemes defined in the DVB-RCS2 standard.
10 citations
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28 May 2000TL;DR: A decision-directed carrier-recovery technique for coherent demodulation of quadrature amplitude modulated (QAM) signals is proposed, which adaptively tracks both the carrier frequency and phase of the received QAM signal's modulated carrier.
Abstract: A decision-directed carrier-recovery technique for coherent demodulation of quadrature amplitude modulated (QAM) signals is proposed. This system adaptively tracks both the carrier frequency and phase of the received QAM signal's modulated carrier. The acquisition time of the proposed system is shown to be faster than that of conventional carrier-recovery schemes, especially when the initial carrier-frequency offset is relatively large, i.e. beyond a small fraction of the symbol rate. Also, the proposed method has a wider acquisition range compared to conventional techniques.
10 citations
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TL;DR: It is demonstrated that the new trellis quantisation schemes based on ring convolutional codes is superior to conventional trellIS-coded quantisation (TCQ) of the same complexity.
Abstract: A new trellis-based coded quantisation scheme using ring convolutional codes is presented When it is combined with trellis-coded continuous phase modulation (TCCPM) with convolutional codes over rings, a powerful joint source and channel coding (JSCC) scheme can be formed We investigate the additive white Gaussian noise (AWGN) channel and the Rayleigh fading channel Optimal soft decoding for the proposed JSCC scheme is studied The soft decoder is based on the a posteriori probability (APP) algorithm for TCCPM with ring convolutional codes It is shown that these systems with soft decoding outperform the
same systems with hard decoding especially when the systems operate at low to medium signal-to-noise ratio (SNR) It is demonstrated that the new trellis quantisation schemes based on ring convolutional codes is
superior to conventional trellis-coded quantisation (TCQ) of the same complexity The novelty of this work is in the development of a trellis-based quantisation method using ring convolutional codes and the use of a soft decoder and the APP algorithm for the combined systems
10 citations