Garis besar topik

  • SPREAD SPECTRUM

    Spread spectrum is an important form of encoding for wireless communications. The use of spread spectrum makes jamming and interception more difficult and provides improved reception. The basic idea of spread spectrum is to modulate the signal so as to increase significantly the bandwidth (spread the spectrum) of the signal to be transmitted.

    • THE CONCEPT OF SPREAD SPECTRUM Berkas
      Siswa harus
      Tandai selesai

      The spread spectrum technique was developed initially for military and intelligence requirements. The essential idea is to spread the information signal over a wider bandwidth to make jamming and interception more difficult. The first type of spread spectrum developed is known as frequency hopping.1 A more recent type of spread spectrum is direct sequence. Both of these techniques are used in various wireless communications standards and products.


    • CIRCUIT SWITCHING AND PACKET SWITCHING Berkas
      Siswa harus
      Tandai selesai

      Circuit switching is used in public telephone networks and is the basis for private networks built on leased lines and using on-site circuit switches. Circuit switching was developed to handle voice traffic but can also handle digital data, although this latter use is often inefficient.


    • CISCO IOS (CCNA) Berkas
      Siswa harus
      Tandai selesai
    • discuss Forum
      Siswa harus
      Tandai selesai
    • Siswa harus
      Tandai selesai