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Showing result 6 - 10 of 20 essays matching the above criteria.

  1. 6. Implementation of 64-point FFTs as a building block for OFDM-based standards with respect to different criteria

    University essay from KTH/Skolan för informations- och kommunikationsteknik (ICT)

    Author : Sarojanarayanamurthy Rajavari Krishnaih Lokanadhan; [2013]
    Keywords : ;

    Abstract : Abstract This master thesis implements a critical block: Fast Fourier Transform (FFT)/Inverse Fast Fourier Transform (IFFT) for standards using Orthogonal Frequency Division Multiplexing (OFDM). They are used in OFDM systems for modulating / demodulating subcarriers. READ MORE

  3. 7. Spectrum Sensing of acoustic OFDM signals

    University essay from Kommunikationssystem; Tekniska högskolan

    Author : Sivakesava Reddy Malkireddy; [2012]
    Keywords : OFDM; Autocorrelation; Spectrum Sensing; Cognitive radio; GLRT;

    Abstract : OFDM is a fast growing technology in the area of wireless communication due to its numerous advantages and applications. The current and future technologies in the area of wireless communications like WiMAX, WiFi, LTE, MBWA and DVB-T uses the OFDM signals. READ MORE

  4. 8. IP Multicasting over DVB-T/H and eMBMS : Efficient System Spectral Efficiency Schemes for Wireless TV Distributions

    University essay from Institutionen för informationsteknologi och medier

    Author : S.M. Hasibur Rahman; [2012]
    Keywords : eMBMS; DVB-T; Multicasting; system spectral efficiency;

    Abstract : In today’s DVB-T/H (Digital Video Broadcasting-Terrestrial/Handheld) systems, broadcasting is employed, meaning that TV programs are sent over all transmitters, also where there are no viewers. This is inefficient utilization of spectrum and transmitter equipment. IP multicasting is increasingly used for IP-TV over fixed broadband access. READ MORE

  5. 9. Investigation of LDPC code in DVB-S2

    University essay from Datorteknik; Tekniska högskolan

    Author : Hanxiao Ge; [2012]
    Keywords : LDPC code; DVB-S2; Restructured parity-check matrix; Layered message passing LMP ; Reconstructed decoding table;

    Abstract : As one of the most powerful error-correcting codes, Low-density parity check codes are widely used in digital communications. Because of the performance of LDPC codes are capable to close the shannon limited extraordinarily, LDPC codes are to be used in the new Digital Video Broadcast-Satellite-Second Generation(DVB-S2) and it is the first time that LDPC codes are included in the broadcast standard in 2003. READ MORE

  6. 10. Design of a DVB-T Receiver : For SFN on a DSP-Processor

    University essay from Datorteknik; Tekniska högskolan

    Author : Erik Hägglund; [2012]
    Keywords : OFDM; DVB-T; SFN; DSP; Long Delay Spread; Strong Echo;

    Abstract : The goal of this thesis was to implement a DVB-T receiver on Coresonic’s DSP-processor and attempt to evaluate how to design a receiver that is robust against very strong echoes with a long delay. Long delayed echoes is very common in Single Frequency Networks (SFN) which is why focus was put on finding algorithms that work well in SFN. READ MORE