Author: John Priyantha FonsekaPublisher:
ISBN:
Category : Demodulation (Electronics)
Languages : en
Pages : 292
Book Description
Detection of Continuous Phase Frequency Shift Keyed Signals
Author: John Priyantha FonsekaPublisher:
ISBN:
Category : Demodulation (Electronics)
Languages : en
Pages : 292
Book Description
Detection of Continuous Phase Frequency Shift Keyed Signals
Author: John Priyantha FonsekaPublisher:
ISBN:
Category : Demodulation (Electronics)
Languages : en
Pages : 0
Book Description
Distance Properties of Uncoded and Coded Continuous Phase Frequency Shift Keyed Signals
Author: Ranjith LiyanapathiranaPublisher:
ISBN:
Category : Phase shift keying
Languages : en
Pages : 298
Book Description
Trellis Coding on Multi-amplitude Continuous Phase Frequency Shift Keying
Author: Anuj Raj OjhaPublisher:
ISBN: 9780549352280
Category : Frequency spectra
Languages : en
Pages : 99
Book Description
Continuous Phase Frequency Shift Keying (CPFSK) is a type of non-linear modulation, where the phase change from one symbol to the next symbol is continuous resulting in a faster spectral roll-off and smaller bandwidth. The multi-amplitude CPFSK (MACPFSK), which is created by superposition of CPFSK signals, is a class of CPFSK signals which also preserves the phase continuity; however it looses the constant envelope property. Application of trellis coding to MACPFSK significantly improves the system performance as it increases the minimum distance by introducing restrictions on the symbols that can be in a sequence. Thus a trellis code can be efficiently designed to achieve maximum separation in signals resulting in higher minimum distance value. Moreover, another class of Trellis Coded MACPFSK (TC-MACPFSK) signals can also be generated by altering the alignment of individual CPFSK signal, which is equivalent to the introduction of timing offset. This method inherently reduces the Peak to Average Power Ratio (PAPR) and also improves the system performance in terms of minimum distance for a particular value of timing offset.
Distance Properties of Uncoded and Coded Continuous Phase Frequency Shift Keyed Signals
Author: Ranjith LiyanapathiranaPublisher:
ISBN:
Category : Phase shift keying
Languages : en
Pages : 0
Book Description
On the Improvements of Continuous Phase Frequency Shift Keyed Signaling
Author: John Priyantha FonsekaPublisher:
ISBN:
Category : Modulation (Electronics)
Languages : en
Pages : 306
Book Description
Digital Phase Modulation
Author: John B. AndersonPublisher: Springer Science & Business Media
ISBN: 1489920315
Category : Technology & Engineering
Languages : en
Pages : 509
Book Description
The last ten years have seen a great flowering of the theory of digital data modulation. This book is a treatise on digital modulation theory, with an emphasis on these more recent innovations. It has its origins in a collabor ation among the authors that began in 1977. At that time it seemed odd to us that the subjects of error-correcting codes and data modulation were so separated; it seemed also that not enough understanding underlay the mostly ad hoc approaches to data transmission. A great many others were intrigued, too, and the result was a large body of new work that makes up most of this book. Now the older disciplines of detection theory and coding theory have been generalized and applied to the point where it is hard to tell where these end and the theories of signal design and modulation begin. Despite our emphasis on the events of the last ten years, we have included all the traditional topics of digital phase modulation. Signal space concepts are developed, as are simple phase-shift-keyed and pulse-shaped modulations; receiver structures are discussed, from the simple linear receiver to the Viterbi algorithm; the effects of channel filtering and of hardlimiting are described. The volume thus serves well as a pedagogical book for research engineers in industry and second-year graduate students in communications engineering. The production of a manageable book required that many topics be left out.
On the improvements of continuous phase frequency shift keyed signaling
Author: John P. FonsekaRobust Detection Schemes for Frequency Shift Keyed and Phase Shift Keyed Signals
Author: J. KrishnamurthyPublisher:
ISBN:
Category :
Languages : en
Pages : 101
Book Description
Two Robust Detection Schemes for the detection of a class of time varying signals in additive disturbance are proposed and analyzed and their performance is evaluated. The proposed detection schemes, called Robust Detection Scheme I (RDSI) and Robust Detection Scheme II (RDSII) are applicable when the samples of the received signal or a filtered version of the received signal contain pure signal components that are all equal. It is shown that both binary and M-ary Phase Shift Keyed and Frequency Shift Keyed Signals can be detected by using RDSI and RDSII. The performance of the detectors is compared with that of the Mean and Sign detectors. It is observed that the proposed detectors generally lead to lower probability of error, except when the Mean and the Sign detectors are the Maximum Likelihood detectors. Analytical expressions for the average probability of error, the asymptotic relative efficiency and the asymptotic efficiency are derived and it is shown that the proposed detectors are superior or equivalent to the Sign detector and superior to the Mean detector in nongaussian noise. (Author).
Detection, Receivers, and Performance of CPFSK and CPCK
Author: Mohammed Omar M. ZourobPublisher:
ISBN:
Category :
Languages : en
Pages : 274
Book Description
Continuous Phase Modulation (CPM) is a power/bandwidth efficient signaling technique for data transmission. In this thesis, two subclasses of this modulation called Continuous Phase Frequency Shift Keying (CPFSK) and Continuous Phase Chirp Keying (CPCK) are considered and their descriptions and properties are discussed in detail and several illustrations are given. Bayesian Maximum Likelihood Ratio Test (MLRT) is designed for detection of CPFSK and CPCK in AWGN channel. Based on this test, an optimum receiver structure, that minimizes the total probability of error, is obtained. Using high- and low-SNR approximations in the Bayesian test, two receivers, whose performances are analytically easy-to-evaluate relative to the optimum receiver, are identified. Next, a Maximum Likelihood Sequence Detection (MLSD) technique for CPFSK and CPCK is considered and a simplified and easy-to-understand structure of the receiver is presented. Finally, a novel Decision Aided Receiver (DAR) for detection of CPFSK and CPCK is presented and closed-form expressions for its Bits Error Rate (BER) performance are derived. Throughout the thesis, performances of the receivers are presented in terms of probability of error as a function of Signal-to-Noise Ratio (SNR), modulation parameters and number of observation intervals of the received waveform. Analytical results wherever possible and, in general, simulation results are presented. An analysis of numerical results is given from the viewpoint of the ability of CPFSK and CPCK to operate over AWGN Channel.