TRANSMISSION OF SHORT MESSAGES IN SATELLITE COMMUNICATION SYSTEMS WITH PERMUTATION MODULATION AND REED-SOLOMON CODES

2021 ◽  
Author(s):  
М.А. БЫХОВСКИЙ
Keyword(s):  
Turbo Codes ◽  
Energy Efficient ◽  
Communication Systems ◽  
Communication Channel ◽  
Satellite Communication ◽  
Short Message ◽  
Rs Codes ◽  
Efficient Communication ◽  
Modulation Methods ◽  
Short Messages

В статье выполнено исследование возможности создания энергетически эффективных систем связи, предназначенных для передачи коротких сообщений длиной 50...1000 бит по каналу связи, в которых применяются ансамбли сигналов с перестановочной модуляцией, а также коды Рида-Соломона. Полученные результаты показали, что рассмотренные системы связи при вероятности ошибки декодирования принятого сообщения, равной Pdec=10-6 , имеют существенный энергетический выигрыш (примерно 2,6 дБ) по сравнению с системами, в которых используются сигналы с модуляцией 2-PSK, коды с малой плотностью проверок на четность (LDPC), турбокоды и др. Кроме того, показано, что системы связи, в которых для передачи коротких сообщений применяются ансамбли сигналов, оптимальных по Шеннону, энергетически эффективнее по сравнению с системами, в которых для этого используются традиционные методы модуляции и помехоустойчивые коды. Применение оптимальных по Шеннону ансамблей позволяет существенно сократить длительность сигналов при передаче такого же количества бит, которое может быть передано по каналу связи традиционными методами. The article investigates the possibility of creating energy-efficient communication systems designed to transmit short messages 50...1000 bits long via a communication channel in which signal ensembles with permutation modulation (PM) are used, as well as Reed-Solomon (RS) codes. The results obtained showed that the considered communication systems with a probability of decoding error of the received message equal to Pdec=10-6 have a significant energy gain (approximately 2.6 dB), in comparison with systems that use signals with 2-PSK and LDPC codes, turbo codes, etc. It is shown that communication systems using Shannon-optimal signal ensembles for short message transmission are more energy efficient than systems using traditional modulation methods and noise-resistant codes. The use of Shannon-optimal ensembles can significantly reduce the duration of signals when transmitting the same number of bits that can be transmitted over the communication channel by traditional methods.

Power Management Technique for Energy-Efficient Communication Systems in Telemedicine

2021 ◽  
pp. 115-143
Author(s):  
K. Sujatha ◽  
N. P. G. Bhavani ◽  
Rajeswary Hari ◽  
K. Senthil Kumar ◽  
N. Jayachitra ◽  
...  
Keyword(s):  
Power Management ◽  
Energy Efficient ◽  
Communication Systems ◽  
Management Technique ◽  
Energy Efficient Communication ◽  
Efficient Communication

scholarly journals Model Pengembangan Short Massage Service (SMS) pada jaringan Seluler

2018 ◽  
Vol 22 (2) ◽  
Author(s):  
Munir Tubagus
Keyword(s):  
Wireless Communication ◽  
Communication Systems ◽  
Short Message Service ◽  
Short Message ◽  
Signal Transfer ◽  
Web Based ◽  
Voice Mail ◽  
Home Location ◽  
Message Service ◽  
Short Messages

Abstract. Short Massage Service (SMS) is a service that is widely applied to wireless communication systems, allowing it to send messages in alphanumeric form between customer terminals or between customer terminals and external systems such as email, paging, voice mail. In the SMS system, the main mechanism carried out in the system is sending short messages from one customer terminal to another. This can be done thanks to the existence of an entity in the SMS system called Short Message Service Center (SMSC), also called the Message Center (MC). SMSC is a device that performs store tasks and forward short message traffic. It includes determining or searching the route for the final destination of the short message. An SMSC is usually designed to be able to handle short messages from various sources such as Voice Mail System (VMS), Web-based messaging, Email Integration, External Short Messaging Entities (ESME), and others. In interconnecting with entities in wireless communication networks such as Home Location registers (HLR) and Mobile Swicthing Centers (MSC), SMSCs usually always use Signal Transfer Points (STP).  Keywords : Information Technology, Short Message Service, Web-Based, Wireless Networks, Cellular Communication  Abstrak. Layanan Pesan Singkat (SMS) adalah layanan yang secara luas diterapkan pada system komunikasi nirkabel, yang memungkingkannya mengirim pesan dalam bentuk alfanumerik antara terminal pelanggan atau antara terminal pelanggan dan system eksternal seperti email, paging, voice email. Dalam sistem SMS, mekanisme utama yang dilakukan dalam sistem  adalah mengirim pesan singkat dari satu terminal pelanggan ke terminal pelanggan lainnya. Ini bisa dilakukan berkat keberadaan entitas dalam system SMS yang disebut Pusat Layanan Pesan Singkat (SMSC), juga disebut Pusat Pesan (MC). SMSC adalah perangkat yang melakukan tugas menyimpan dan meneruskan lalu lintas pesan singkat. Ini termasuk menentukan atau mencari rute untuk tujuan akhir dari pesan singkat. Sebuah SMSC Biasanya dirancang untuk dapat menanggani pesan singkat dari berbagai sumber seperti Voice Mail Sistem (VMS), pesan berbasis Web, Integrasi Email, Entri Perpesanan Singkat Eksternal (ESME), dan lainnya. Dalam Interkoneksi dengan entitas dalam jaringan komunikasi nirkabel seperti Home Location register (HLR) dan Mobile Switching Centers (MSC), SMSC biasanya selalu menggunakan Signal Transfer Points (STP). Keywords : Informasi Teknologi, Layanan Pesan Singkat, Berbasis Web, Jaringan Nirkabel, Komunikasi Seluler

scholarly journals Model of Satellite Communication Channel Functioning under Conditions of Disturbances of Service Part of Frames by Unsteady Interference

2020 ◽  
Vol 19 (5) ◽  
pp. 967-990
Author(s):  
Andrey Parshutkin ◽  
Dmitriy Buchinskiy
Keyword(s):  
Communication Systems ◽  
Communication Channel ◽  
Noise Immunity ◽  
Satellite Communication ◽  
Block Diagram ◽  
Satellite Communications ◽  
Frame Synchronization ◽  
Code Structure ◽  
Service Information ◽  
The Impact

The paper describes the main ways of organizing modern satellite communication systems and the methods of synchronization and transmission of service information used in them, the frame synchronization mechanism from the view point of noise immunity. Based on the analysis, a block diagram of a simulation model is proposed for studying the influence of unintentional interference on the channels of modern satellite communication systems. The proposed model of the impact of non-stationary interference on a satellite communication channel takes into account the effect of interference on symbolic, frame synchronization, mechanisms for extracting frame boundaries, as well as the effect of modern error correction codes. The model allows evaluating the impact of non-stationary interference on both the information and the service side of the frame of modern systems of broadband satellite communications. As an indicator of the noise immunity of a satellite communication channel, there was used probability of frame loss, i.e. frame skipping due to a violation in the frame synchronization system, incorrect allocation of frame boundaries, or the presence of errors in the frame that were not repaired by corrective codes. Using this model, we studied the effect of non-stationary interference of various durations on the information and service parts of the frame, compared the results of the impact of non-stationary interferences of various durations with the effect of white Gaussian noise. It is shown that non-stationary interference, which are short noise pulses that do not affect the information part of the frame due to reparation by correction codes, can significantly reduce the reception quality due to disruption of frame synchronization and distortion of service information about the signal-code structure and frame length.

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