Implementation of CDMA receiver using Recursive Digital Matched Filter

Srisakthi, N.; Rao, Ch. V. Rama; Vidya, M. J.

doi:10.9790/4200-04322328

Cited by 2 publications

(2 citation statements)

References 12 publications

(9 reference statements)

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“…The most sensitive part of a DSSS system is the synchronization of the PN sequence of the transmitter with that generated at the receiver stage. Synchronization can be implemented using a known preamble between the transmitter and receiver, which is synchronized by a matched filter [36], [37]. In the literature, this method is known as Data-Aided (DA) synchronization [38].…”

Section: Implementation Of the Dedicated Software Defined Radio Receivermentioning

confidence: 99%

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Drivers’ Warning Application Through Personalized DSSS-CDMA Data Transmission by Using the FM Radio Broadcasting Infrastructure

Bozomitu

Huţu

2023

IEEE Access

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In this paper, a new drivers' warning application through personalized Direct-Sequence Spread Spectrum Code-Division Multiple Access (DSSS-CDMA) transmissions, performed using the FM radio broadcasting infrastructure is presented. The proposed application is designed to simultaneously transmit a maximum of 15 low-resolution image notifications together with standard FM radio broadcasting in different geographical areas. The application is intended to warn drivers of significant driving events in major traffic areas of a country. The proposed solution is low-cost and rapid to put into practice because the modifications, both on the transmission infrastructure and on the receiver's side, are relatively easy to implement. The transmission of image notifications is performed in subsidiary bands of commercial FM radio systems. The receiver is implemented using the Software-Defined Radio (SDR) paradigm and is able to extract the audio signal (corresponding to the usual FM transmission) and the data component, depending on the geographical area in which the vehicle is located. The receiver is based on a novel implementation of a modified Costas loop using two new nonlinear limiters. Appropriate image notification is selected using a specific decoding key, generated according to the geographical position of the vehicle. The performance of the data transmission system is analyzed by plotting the Bit Error Rate (BER) versus the signal-to-noise ratio of the data signal for different numbers of image notifications simultaneously transmitted. The proposed radio communication system was validated through an experimental setup based on Universal Software Radio Peripheral (USRP) devices driven by MATLAB/Simulink software.INDEX TERMS Automotive applications, digital modulation, radio broadcasting, radio communication, software defined radio.

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Section: Implementation Of the Dedicated Software Defined Radio Receivermentioning

confidence: 99%

“…11 is used to extract the information from the two received DSSS-CDMA sequences. This block diagram includes a delay-lock tracking loop based on the principle illustrated in [15] for tracking and an acquisition stage based on the SDSS technique [36], [42].…”

Section: ) Extracting the Image Data By Using A Dll-based Circuitmentioning

confidence: 99%