CPM Training Waveforms With Autocorrelation Sidelobes Close to Zero

Liu, Zilong; Guan, Yong Liang; Chui, Chee-Cheon

doi:10.1109/tvt.2018.2867680

Cited by 7 publications

(5 citation statements)

References 23 publications

(34 reference statements)

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“…Finally, sequence α i forms the transmitted CPM signal waveform s(t) through the CPM modulator. The normalized equivalent lowpass expression of binary single modulation index CPM signal is [25,26]…”

Section: Mathematical Model Of the Semi-integer Cpm Signal Modelmentioning

confidence: 99%

A Novel Unambiguous Acquisition Algorithm Based on Decomposition and Reconstruction of Sub-correlation Functions for Semi-integer CPM Signals

Xie,

Xue

2024

Preprint

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Continuous phase modulation (CPM) is a nonlinear modulation scheme known for its excellent frequency and power efficiency. CPM with a semi-integer modulation index greater than 1 not only has spectral splitting characteristics like binary offset carrier modulation but also exhibits superior tracking performance and compatibility. However, the multiple side peaks in the autocorrelation function (ACF) of the semi-integer CPM signals introduce ambiguity threats in signal acquisition, and most existing ambiguity cancellation methods are not suitable for CPM signals due to the nonlinear nature of CPM signals. Therefore, a novel unambiguous acquisition algorithm based on decomposition and reconstruction of sub-correlation functions (DRSCF) is proposed for semi-integer CPM signals. The algorithm further decomposes the first pulse amplitude modulation waveform after Laurent decomposition to obtain sub-signal waveforms suitable for CPM signals and reconstructs the unambiguous correlation function by a nonlinear combination of sub-correlation functions. Subsequently, energy loss compensation is performed using ACF. Theoretical analysis and simulation results show that the proposed technique effectively eliminates the ambiguity threat in the acquisition process of semi-integer CPM signals at the expense of some detection performance loss while maintaining the narrow correlation peak characteristics of semi-integer CPM signals.

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Section: Mathematical Model Of the Semi-integer Cpm Signal Modelmentioning

confidence: 99%

A Novel Unambiguous Acquisition Algorithm Based on Decomposition and Reconstruction of Sub-correlation Functions for Semi-integer CPM Signals

Xie,

Xue

2024

Preprint

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“…Apart from this good performance of the presented SSB-FSK, the sideband power reduction may further enhance the performance of the iterative decoder. Thus the sideband power reduction based on [20] could be considered as the future scope of the presented research work.…”

Section: Figure 8 Ber Plots Of Sc Ssb-fsk and Its Iterative Decoding ...mentioning

confidence: 99%

Serially Concatenated Schemes for Single Sideband Continuous Phase Modulation

Kumar,

Farès,

Louët

2023

IEEE Open J. Commun. Soc.

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This paper investigates serially concatenated (SC) and interleaved transmission schemes for a new class of continuous phase modulation (CPM), which has the property being a single sideband (SSB). This new CPM is commonly called Single Side-Band Frequency Shift Keying (SSB-FSK). Due to the ample space of SSB-FSK parameters, finding good serially concatenated schemes using SSB-FSK with desired spectral and energy efficiencies as well as reasonable complexity, is challenging. We present a systematic, simulation-based extrinsic information transfer (EXIT) chart approach to evaluate this multiobjective problem (improve spectral and energy efficiencies and reduce complexity) and subsequently design a competitive serially concatenated SSB-FSK based scheme. We show that iterative decoding of SC schemes using SSB-FSK (SC-SSB-FSK) provides close to optimal performance. Furthermore, the bit error rate (BER) of SC-SSB-FSK is compared to that using raised cosine (RC) based CPM signals. It has been shown that the proposed technique outperforms the state-of-the-art serially concatenated systems.INDEX TERMS Serially concatenated schemes, SSB signal, CPM waveform, power-limited applications, 6G.

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“…Explanation of Algorithm 1: In Step 1, we first take samples of the noise standard deviation (s.d.) from a feasible range, so that the resultant SNR limits vary from very high to very low values 2 . For each sample, we find the corresponding analytical error probability of the CPM-LDPC decoder (Steps 2-6) for a predefined maximum number of turbo iterations.…”

Section: Finite-length Performance Estimationmentioning

confidence: 99%

“…Continuous phase modulation (CPM) is an attractive nonlinear modulation scheme whose signals exhibit constant envelope (i.e., high power efficiency) and tight spectrum confinement [1], [2]. Hence CPM has been used in many areas such as military and satellite communications [3], the 2ndgeneration global system of mobile communications (GSM), and in millimeter communications [4].…”

Section: Introductionmentioning

confidence: 99%

Finite-Length Performance Analysis of LDPC Coded Continuous Phase Modulation

Noor-A-Rahim

Liu

Guan

et al. 2020

IEEE Trans. Veh. Technol.

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Serial concatenation of LDPC codes and continuous phase modulation (CPM) has recently gained significant attention due to its capacity-approaching performance, efficient detection as well as owing to its constant-envelope nature. Most of the previous contributions on LDPC coded CPM were devoted to the design of LDPC codes and their asymptotic performance analysis. However, there is a paucity of work on the finitelength performance estimation of LDPC coded CPM, primarily because existing performance estimation techniques cannot be readily applied to the LDPC coded CPM. To fill this gap, we conceive an analytical bit error probability estimation technique for finite-length LDPC coded CPM in the waterfall region. Numerical results are provided both for regular and irregular LDPC codes having different codeword lengths, demonstrating that the estimated performances are closely matched by the simulated ones.

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CPM Training Waveforms With Autocorrelation Sidelobes Close to Zero

Cited by 7 publications

References 23 publications

A Novel Unambiguous Acquisition Algorithm Based on Decomposition and Reconstruction of Sub-correlation Functions for Semi-integer CPM Signals

A Novel Unambiguous Acquisition Algorithm Based on Decomposition and Reconstruction of Sub-correlation Functions for Semi-integer CPM Signals

Serially Concatenated Schemes for Single Sideband Continuous Phase Modulation

Finite-Length Performance Analysis of LDPC Coded Continuous Phase Modulation

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