Scrambled Voice Frequency Signal Transmission in an Amplify and Forward Relaying Based STBC Encoded Cooperative MIMO-OFDM System

Chisty, K. J. A.; Islam, S. M. A.; Ullah, S. E.; Sabuj, Saifur Rahman

doi:10.14257/ijsip.2014.7.2.14

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…Intelligent reflecting surface (IRS) is a relatively new wireless communication method that utilizes an array of reflective surfaces that are changed to direct the signal wave towards a particular user or receiver [97,98]. In contrast, relaying is used to transmit data from one source to another through a secondary source [99,100]. IRS is a radical and game-changing technique for achieving future spectrum and energy efficiency in wireless communications.…”

Section: Figure 11: Application Of Uavsmentioning

confidence: 99%

Low Altitude Satellite Constellation for Futuristic Aerial-Ground Communications

Sabuj¹,

Alam²,

Haider³

et al. 2023

Computer Modeling in Engineering &Amp; Sciences

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This paper discusses the significance and prospects of low altitude small satellite aerial vehicles to ensure smooth aerial-ground communications for next-generation broadband networks. To achieve the generic goals of fifthgeneration and beyond wireless networks, the existing aerial network architecture needs to be revisited. The detailed architecture of low altitude aerial networks and the challenges in resource management have been illustrated in this paper. Moreover, we have studied the coordination between promising communication technologies and low altitude aerial networks to provide robust network coverage. We talk about the techniques that can ensure userfriendly control and monitoring of the low altitude aerial networks to bring forth wireless broadband connectivity to a new dimension. In the end, we highlight the future research directions of aerial-ground communications in terms of access technologies, machine learning, compressed sensing, and quantum communications.

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Section: Figure 11: Application Of Uavsmentioning

confidence: 99%

Low Altitude Satellite Constellation for Futuristic Aerial-Ground Communications

Sabuj¹,

Alam²,

Haider³

et al. 2023

Computer Modeling in Engineering &Amp; Sciences

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“…The following is the equation for the signal received , where and have been assumed as AWGN for the transmitted signal and channel matrix, respectively. (11) After factorizing the by (unitary matrix) and (upper triangular matrix) we find as follows [25,26], (12) , , 0 , Additionally, the product of the received signal, , and gives, (13) Here, refers to zero-mean complex Gaussian random vector [27], where, and are statistically of equivalent properties. Therefore, (13) can be rewritten as, (14) , ,…”

Section: Zf-sic Detectionmentioning

confidence: 99%

Cooperative MIMO OFDM system based on Amplify and Forward Relay: Evaluation of ZF-SIC and MMSE-SIC equalization

Rahman¹

2018

ELECTROTECHNICAL REVIEW

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In the world of wireless communication, cooperative communication is a modern and unprecedented approach which enables wireless nodes to transfer the information in a cooperative manner and finally to reach the destination without least possible deterioration. Orthogonal frequency division multiplexing (OFDM) can provide high data rate and better performance and a combination of OFDM and cooperative communication may push a wireless network forward to its next generation with enhanced reliability and efficiency. In this work, we develop a mathematical model for cooperative multiple input multiple output (MIMO) OFDM system. Results are achieved in the study to evaluate and compare bit error rate (BER) for different detection schemes. Based on the results it can be mentioned that the performance of cooperative MIMO-OFDM with space time block code (STBC) under amplify and forward (AF) relay for the MMSE-SIC detection scheme was found very satisfactory with improved signal to noise ratio (SNR). Streszczenie. W artykule przedstawiono model matematyczny kooperacyjnej komunikacji bezprzewodowej wiele wejść, wiele wyjść (MIMO) z multipleksingiem i ortogonalnym podziałem częstotliwości (OFDM). Określono współczynnik BER (bit error rate) dla różnych metod detekcji. Najlepsze parametry otrzymano dla systemu STBC (space time block code). Kooperacyjny system komunikacji bezprzewodowej MIMO OFDM bazujący na układzie Forward Relay: ocena ekwalizacji ZF-SIC i MMSE-SIC

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A new method of speech transmission over space time block coded co-operative MIMO–OFDM networks using time and space diversity

Sheikh

Akhtar

Parah

et al. 2017

Int J Speech Technol

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Scrambled Voice Frequency Signal Transmission in an Amplify and Forward Relaying Based STBC Encoded Cooperative MIMO-OFDM System

Cited by 3 publications

References 13 publications

Low Altitude Satellite Constellation for Futuristic Aerial-Ground Communications

Low Altitude Satellite Constellation for Futuristic Aerial-Ground Communications

Cooperative MIMO OFDM system based on Amplify and Forward Relay: Evaluation of ZF-SIC and MMSE-SIC equalization

A new method of speech transmission over space time block coded co-operative MIMO–OFDM networks using time and space diversity

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