The influence of sampling frequency and interpolation on the bit error rate of GMSK signal

2021 ◽  
pp. 108-114
Author(s):  
D.D. Privalov
Keyword(s):  
Signal Detection ◽  
Bit Error Rate ◽  
Error Rate ◽  
Clock Synchronization ◽  
Additive White Gaussian Noise ◽  
Sampling Rate ◽  
Digital Signal ◽  
Sampling Frequency ◽  
Synchronization Error ◽  
Minimum Number

The sampling rate at a given bit rate is a requirement for the speed of digital signal processors. In this regard, it is necessary to strive to reduce it in the development of electronic devices, especially portable ones. However, this can lead to an increase in the bit error rate during signal detection. Therefore, it is important to determine the degradation of signal detection with decreasing sampling frequency and to develop practical recommendations to ensure the specified quality of communication. The aim of the article is to study the influence of sampling frequency and interpolation on the bit error rate of GMSK Signal. The article considers the incoherent detection of a GMSK signal in a channel with additive white Gaussian noise, taking into account the influence of the clock synchronization error. Numerical results are presented that characterize an increase in the bit error rate with a decrease in the signal sampling frequency. It is shown that when using the cubic Farrow interpolator, there is no significant degradation in the bit error probability. The minimum number of samples per symbol is determined, at which the bit error rate is close to the theoretical values in the absence of synchronization error. The presented results can be used in development of wireless data transmission systems.

scholarly journals Evaluasi Modulasi MFSK untuk Transmisi Data Melalui Kanal Suara GSM

Jurnal INKOM ◽  
2014 ◽  
Vol 8 (1) ◽  
pp. 37
Author(s):  
Rika Sustika ◽  
Oka Mahendra
Keyword(s):  
Mobile Communication ◽  
Bit Error Rate ◽  
Error Rate ◽  
Gaussian Noise ◽  
Linear Prediction ◽  
Signal To Noise Ratio ◽  
Additive White Gaussian Noise ◽  
Signal To Noise ◽  
Global System ◽  
Shift Keying

Pada tulisan ini, dievaluasi performansi skema modulasi MFSK (M-ary Frequency Shift Keying) untuk aplikasi pengiriman data melalui kanal suara GSM (Global System for Mobile Communication). Parameter yang dievaluasi berupa kesalahan bit trasmisi yang dinyatakan dengan laju kesalahan bit atau bit error rate (BER). Evaluasi ini dilakukan untuk menentukan besarnya orde M yang akan dipilih pada aplikasi pengiriman data digital melalui kanal suara GSM. Pada proses simulasi, data digital dikodekan menjadi simbol-simbol lalu dimodulasi menggunakan modulator MFSK menjadi data menyerupai pembicaraan (suara). Suara yang dihasilkan dikodekan dengan algoritma CELP (Code Excited Linear Prediction), kemudian dikirimkan melalui udara yang dimodelkan sebagai kanal AWGN (Additive White Gaussian Noise). Di sisi penerima, sinyal terima yang menyerupai suara ini didemodulasi dan dikonversi kembali menjadi data digital. Dari simulasi menggunakan Eb/No (signal to noise ratio) sebesar 6 dB, diperoleh laju bit 2,5 kbps dengan BER 2,01 x 10-3 untuk M=4, 2,22 x 10-3 untuk M=8, dan 1,87 x 10-3 untuk M=16.

scholarly journals THE STUDY OF BIT ERROR RATE EVOLUTION IN A MOBILE COMMUNICATIONS SYSTEM USING DS – CDMA TECHNOLOGY

2017 ◽  
Vol 18 (2) ◽  
Author(s):  
ION POPA
Keyword(s):  
Mobile Communications ◽  
Bit Error Rate ◽  
Error Rate ◽  
Code Division Multiple Access ◽  
Additive White Gaussian Noise ◽  
Direct Sequence ◽  
Access Technology ◽  
M Sequence ◽  
Code Division Multiple ◽  
Communications System

<p>This paper follows the study of bit error rate evolution in a mobile communications system using DS – CDMA (Direct Sequence – Code Division Multiple Access) technology. We have assessed the bit error rate (BER) based on the signal/noise ratio, Eb/N0, and the number of users in the system. For this purpose, we have used M sequence and Orthogonal Gold sequence and the AWGN (Additive white Gaussian noise) transmission medium<strong>.</strong></p>

scholarly journals Bit Error Rate Performance of Spread Spectrum Communication Systems for AWGN Channels

2020 ◽  
Vol 9 (3) ◽  
pp. 277-280
Keyword(s):  
Bit Error Rate ◽  
Error Rate ◽  
Spread Spectrum ◽  
Communication Systems ◽  
Digital Communication ◽  
Additive White Gaussian Noise ◽  
Direct Sequence Spread Spectrum ◽  
Rate Performance ◽  
Direct Sequence ◽  
Spread Spectrum Systems

The digital communication technologies have gained immense significance as it provides secure and error free services. One of the major advantages of digital communication is that they are much resistant to transmitted as well as interpreted errors. For ensuring the security of data, the most suitable method is to use spread spectrum technique. The spread spectrum technique has gained immense popularity for use in various systems as the spreading of the spectral bandwidth offer many advantages, including the establishment of secure communications, increasing resistance to interference, noise rejection, and so on. The signals which are modulated by using these techniques cannot be jammed and are very hard to interfere. This paper presents the results of investigation of BPSK based direct sequence spread spectrum systems for Additive White Gaussian Noise (AWGN) and undersea channels. The bit error rate performance of BPSK based direct sequence spread spectrum systems has been simulated for the AWGN channel and the results have been plotted.

scholarly journals Nonlinear Distortion Cancellation using Predistorter in MIMO-GFDM Systems

Electronics ◽  
2019 ◽  
Vol 8 (6) ◽  
pp. 620
Author(s):  
Ari Endang Jayati ◽  
Wirawan ◽  
Titiek Suryani ◽  
Endroyono
Keyword(s):  
Bit Error Rate ◽  
Error Rate ◽  
Nonlinear Distortion ◽  
Additive White Gaussian Noise ◽  
Future Generation ◽  
Phase Distortion ◽  
Closed Form Expression ◽  
Modulation Scheme ◽  
Nonlinear Distortions ◽  
Saturation Region

Generalized frequency division multiplexing (GFDM) with offset quadrature amplitude modulation (OQAM) is an alternative non-orthogonal modulation scheme for future generation wireless broadband systems. The nonlinearity of high power amplifiers (HPAs) has a very significant effect on the performance of GFDM systems. In this paper, we investigate the effects of nonlinear distortion on the multiple-input multiple-output (MIMO)-GFDM system when the signal is passed the HPA, which is modeled with amplitude and phase distortion. The effects of nonlinear distortion due to the HPA include amplitude distortion, phase distortion, and the spread of signal constellations. These effects also produce harmonic signals and intermodulation outside the frequency band which results in spectral spread. This will then reduce the performance of the MIMO-GFDM system. The contributions of this paper concern three key areas. Firstly, we investigate the effects of nonlinear distortion on the MIMO-GFDM system. We also derive the new closed-form expression bit error rate (BER) in MIMO-GFDM systems that use a memoryless HPA, which is modeled using the Saleh model when passed through the additive white Gaussian noise (AWGN) channel. This model was chosen because it is simple and has AM/AM and AM/PM curves. Secondly, we propose the application of techniques for the linearization of each HPA predistorter on the transmitter side of the MIMO-GFDM system separately. This predistorter is able to compensate for nonlinear distortion caused by the HPA without memory operating in the saturation region. The main contribution of this paper is to investigate the predistorter, which can linearize nonlinear distortion in MIMO-GFDM transmitters. The performance of the proposed scheme is evaluated in terms of spectrum analysis, PAPR analysis, a constellation diagram, and bit error rate (BER) analysis. The simulation results show that the proposed predistorter design succeeds in compensating for nonlinear distortions caused by the HPA for large input back-off (IBO) values.

New Recursive Algorithms for Signal Detection

2011 ◽  
Vol 271-273 ◽  
pp. 1059-1062
Author(s):  
Lei Wang ◽  
Bao Yu Zheng ◽  
Jing Wu Cui
Keyword(s):  
Computational Complexity ◽  
Signal Detection ◽  
Performance Assessment ◽  
Bit Error Rate ◽  
Error Rate ◽  
Recursive Algorithms ◽  
Linear Detector ◽  
Satisfactory Performance ◽  
Grouping Algorithm ◽  
New Algorithms

Based on the synthesis and analysis of recursive receivers, new algorithms are proposed to achieve satisfactory performance with moderate computational complexity. During the analysis, some interesting properties shared by the proposed procedures are described. Finally, the performance assessment shows that new schemes are superior to the linear detector and ordinary grouping algorithm, and achieve a bit-error rate close to that of the optimum receiver.

scholarly journals ANÁLISIS DEL DESEMPEÑO DE UN SISTEMA DE COMUNICACIONES CON MODULACIÓN 16/64 QAM BASADO EN HARDWARE RECONFIGURABLE

2014 ◽  
Vol 25 (1) ◽  
pp. 99-112
Author(s):  
Juan Camilo Zemanate Zuñiga ◽  
Julián Andrés Muñoz Hidalgo ◽  
Victor Manuel Quintero Flórez
Keyword(s):  
Bit Error Rate ◽  
Error Rate ◽  
Gaussian Noise ◽  
Additive White Gaussian Noise ◽  
Field Programmable Gate Arrays ◽  
System Generator ◽  
Gate Arrays ◽  
Field Programmable ◽  
El Sistema ◽  
Programmable Gate Arrays

En el presente artículo se analiza el desempeño de un sistema de comunicaciones banda base con Modulación de Amplitud en Cuadratura (QAM, Quadrature Amplitude Modulation), implementado sobre un Arreglo de Compuertas Programables de Campo (FPGA, Field Programmable Gate Arrays), a partir de la Tasa de Error de Bit (BER, Bit Error Rate) y del comportamiento del hardware reconfigurable.El sistema de comunicaciones banda base consideró un canal de Ruido Blanco Gaussiano Aditivo (AWGN, Additive White Gaussian Noise) y las modulaciones 16 QAM y 64 QAM. Se diseñó a través de la herramienta System Generator® de Xilinx®, se validó (a nivel de simulación) por medio de la comparación con un modelo en Simulink ® y se implementó sobre un FPGA Spartan 6 de Xilinx® mediante la descarga de un archivo de programación. Como resultados se obtuvieron las curvas de desempeño del sistema de comunicaciones banda base con modulación 16/64 QAM, las cuales fueron comparadas con las curvas de desempeño teóricas ofrecidas por la herramienta Bertool® de Matlab® para su correspondiente análisis. De este modo, se concluyó que dada la similitud de las curvas de desempeño obtenidas a partir de System Generator®, Simulink®, implementación y Bertool®, el sistema de comunicaciones banda base alcanzó resultados óptimos sobre hardware reconfigurable.

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