Sökning: "quadrature modulator"

Visar resultat 6 - 10 av 13 avhandlingar innehållade orden quadrature modulator.

  1. 6. On Bit-Wise Decoders for Coded Modulation

    Författare :Mikhail Ivanov; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; bit-error probability; L-values; labeling; Gray code; coded modulation; log-likelihood ratio; maximum likelihood decoder; Additive white Gaussian noise; quadrature amplitude modulation.; interleaver; flat fading channel; pairwise error probability;

    Sammanfattning : Coded modulation is a technique that emerged as a response to the growing demand for high data rates. It was devised to achieve high spectral efficiency with high reliability, potentially approaching Shannon’s capacity. The main idea of coded modulation consists in combining error-correcting coding with higher-order modulation. LÄS MER

  3. 7. Differential Six-port Radio Transceiver for Ultra-wideband and Wideband Antennas

    Författare :Owais Owais; Shaofang Gong; Ke Wu; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : Requirement for high speed wireless connectivity is propelling research in advanced communication systems. Low power and wide bandwidth of the ultra-wideband technology makes it a potential candidate for high speed data transmission. LÄS MER

  4. 8. Multi-Gigabaud Solutions for Millimeter-wave Communication

    Författare :Sining An; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Millimeter-wave communication; power amplifier; mobile network; power combining; outphasing; high order modulation; DQPSK; modem; pilot; 16-QAM; non-linear distortion; E-band; high data rate; carrier recovery;

    Sammanfattning : With the growing number of mobile network and internet services subscriptions, faster communication will provide a better experience for users. In the next generation mobile network, the fifth generation (5G), communication data rate will achieve several Gigabits per second with ultra-low latency. LÄS MER

  5. 9. Selected Applications of Switched Capacitor Circuits : RF N-Path Filters and ΣΔ Modulators

    Författare :Fahad Qazi; Jerzy Dabrowski; Atila Alvandpour; Henrik Sjöland; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Electronic circuits based on switches and capacitors have been used in various applications for several decades. The common switched capacitor (SC) circuits have made their career primarily in analog filters and data converters due to high immunity to capacitance mismatch in integrated circuit (IC) technologies. LÄS MER

  7. 10. Study of Six-Port Modulators and Demodulators for High-Speed Data Communications

    Författare :Joakim Östh; Shaofang Gong; Magnus Karlsson; Robert Weigel; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : There is an increasing demand for high-speed wireless data communications to support consumers’ need for, among other things, real time streaming of high definition video and fast file transfers. One radio architecture that has a potential to meet the increasing demand for high-speed data communications is a radio technique based on the six-port architecture. LÄS MER