Multi-h CPM Signal Format Selection for Communication Systems with Complex Jamming Environment

Куликов, Г. В.; Belousov, O. A.

doi:10.1109/ent.2014.20

Cited by 5 publications

(1 citation statement)

References 6 publications

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“…This allows us to speak about the prospectivity of the format of the M-FSK. Taking into account the good performance of the latter format, further studies are planned to be carried out in the direction of use of M-FSK format signals and their prospective version of M-CPFSK (multi-position frequency modulated signals with a continuous phase) in the considered radio channel with different modulation indices and positioning, in particular CPFSK with modulation indices of 0.5 and 0.75 together with MIMO and OFDM systems [21][22][23][24][25][26][27]. The obtained results can be used in the design of modern and promising UAV-to-ground communication systems.…”

Section: Discussionmentioning

confidence: 99%

Simulation of the Radio Communication Channel with Unmanned Aerial Vehicle in Urban Conditions

Куликов¹

2018

JEEE

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Modern unmanned aerial vehicles (UAVs) are used in many spheres of human activity. In conditions of strong urban development, the radio communication channel with UAV is multi-path, which leads to a significant decrease in the quality of the transfer of useful information. Ensuring reliable and qualitative communication depends on the correct choice of the frequency range and the type of modulation used. Multiposition signals of M-PSK, M-QAM, M-FSK formats are considered. Due to the complexity of the mathematical description of such a radio channel, a computer simulation method was used to obtain the results. A multipath propagation model with a number of beams up to 10 is used. The dependencies of the probability of erroneous reception of information on the parameters of the communication channel are obtained: the signal-tonoise ratio, the number and intensity of the propagation paths. The energy parameters of the radio channel are calculated and the optimal frequency range is estimated from the maximum signal-to-noise ratio. It is indicated that the best in this criterion is the operating frequency range of 2-5 GHz. Calculations showed that the transmission coefficient of the radio channel is unstable and varies greatly in frequency. When using narrow-band signals M-PSK, M-QAM, this can lead to a situation where the signal can get into the "bad" frequency band and the quality of information transfer will decrease significantly. In connection with this, a radio channel with multiposition frequency modulation M-FSK was studied, when the transmission of discrete information is carried out using multiple parcels with different frequencies falling into both "bad" and "good" frequency zones. The results of the study showed that the probability of BER error in some cases improves by times compared to M-PSK and M-QAM. This allows us to talk about the prospects for the M-FSK format. Considering the good performance of this format, further studies are planned in the direction of using M-FSK format signals and their prospective version of M-CPFSK (multi-position frequency modulated signals with a continuous phase) in the considered radio channel with different modulation and positioning indices, in particular CPFSK with modulation indices of 0.5 and 0.75, together with MIMO and OFDM systems. The obtained results can be used in the design of modern and promising UAV-to-ground communication systems.

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Section: Discussionmentioning

confidence: 99%

Simulation of the Radio Communication Channel with Unmanned Aerial Vehicle in Urban Conditions

Куликов¹

2018

JEEE

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A high‐precision timing and frequency synchronization algorithm for multi‐h CPM signals

Liu,

Chen

et al. 2024

IET Communications

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In the context of certain specific digital communication systems, where there are limitations such as spectral resources and energy availability, continuous phase modulation (CPM) emerges as an appealing choice among various modulation methods. Among CPM signals, multi‐h CPM is particularly noteworthy for its ability to address these constraints within the realm of single‐carrier and constant‐envelope waveforms. At the physical layer, the design of a multi‐h CPM receiver necessitates the efficient implementation of timing and frequency synchronization algorithm within a high dynamic environment. So this paper presents an innovative approach for achieving timing and frequency synchronization. To rectify timing offset and mitigate the adverse effects of noise in received signals, a re‐configurable local filter generation method is integrated into the timing synchronization algorithm. Simultaneously, an enhanced least mean square adaptive filter algorithm is applied to address frequency synchronization. A comprehensive series of simulations rigorously evaluates the outcomes of proposed novel synchronization methodology. These analyses demonstrate a notable proximity between the synchronization errors of proposed algorithm in this paper and the performance benchmark set by the modified Cramer–Rao bound. The proposed synchronization technology also exhibits the capability to substantially reduce the bit error rate, thereby effectively enhancing demodulation performance in multi‐h CPM receivers.

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A Novel Chip Pulse Employed by Ranging Code Based on Simultaneous Transmitting CPM Modulation and PN Ranging in Inter-Satellite Links of GNSS

Xue

Wang

Tang³

2020

IEEE Access

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The construction of a navigation constellation with inter-satellite links (ISLs) has become one of the important development trends for new-generation global navigation satellite systems (GNSSs), and ISLs currently realize navigation and communication functions through separate low-rate omnidirectional telemetry, tracking, command and high-rate data service channels, respectively. If the above two functions are integrated into one channel, this will result in simplification of the onboard equipment, improvement of the electromagnetic compatibility, power consumption reduction and frequency resources savings, and we speculate that autonomous navigation will be achieved by ISLs with navigation and communication fusion. In this paper, a system capable of simultaneous high-data rate communication transmission and precision ranging is investigated, and a specific scheme is introduced by combining continuous phase modulation (CPM) and a pseudonoise (PN) ranging code denoted as CPM+PN. The chip pulse is one of the key factors to design the ranging code, which not only affects the ranging performance but also influences the properties of the CPM+PN scheme, such as its spectral characteristics, communication reliability, and acquisition time. To consider the above performance indexes, a new chip pulse based on a normally distributed wave is proposed. Theoretical analysis and simulation results show that compared to squarewave and half-sine wave cases, the normally distributed wave attains great advantages in the ranging accuracy and communication reliability, which become more notable with reasonable selection of the energy distribution index. Moreover, the proposed chip pulse achieves a similar acquisition time as the traditional wave. As a result, the normally distributed wave can be used as a better alternative to the ranging chip pulse for the CPM+PN waveform.

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Multi-h CPM Signal Format Selection for Communication Systems with Complex Jamming Environment

Cited by 5 publications

References 6 publications

Simulation of the Radio Communication Channel with Unmanned Aerial Vehicle in Urban Conditions

Simulation of the Radio Communication Channel with Unmanned Aerial Vehicle in Urban Conditions

A high‐precision timing and frequency synchronization algorithm for multi‐h CPM signals

A Novel Chip Pulse Employed by Ranging Code Based on Simultaneous Transmitting CPM Modulation and PN Ranging in Inter-Satellite Links of GNSS

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