Quadrature Amplitude Modulation - Definition. Was ist Quadrature Amplitude Modulation
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Was (wer) ist Quadrature Amplitude Modulation - definition


Quadrature amplitude modulation         
  • Bit-loading (bits per QAM constellation) on an ADSL line
  • Analog QAM: measured PAL color bar signal on a vector analyzer screen.
  • Digital 16-QAM with example constellation points
  • Constellation points for 4-QAM, 16-QAM, 32-QAM, and 64-QAM overlapped
  • The graphs of the sine (solid red) and [[cosine]] (dotted blue) functions are sinusoids of different phases.
FAMILY OF DIGITAL MODULATON METHODS OF TELEVISION SIGNALS
QAM-modulated; Quadrature Amplitude Modulation; QAM; 256QAM; 256-QAM; 16-QAM; 16QAM; 64-QAM; 64QAM; 2-QAM; 2QAM; 4-QAM; 4QAM; 8-QAM; 8QAM; 32QAM; 32-QAM; 128-QAM; 128QAM; 512-QAM; 512QAM; 1024QAM; 1024-QAM; 2048QAM; 2048-QAM; 4096-QAM; 4096QAM; IQ Modulation; Qam
Quadrature amplitude modulation (QAM) is the name of a family of digital modulation methods and a related family of analog modulation methods widely used in modern telecommunications to transmit information. It conveys two analog message signals, or two digital bit streams, by changing (modulating) the amplitudes of two carrier waves, using the amplitude-shift keying (ASK) digital modulation scheme or amplitude modulation (AM) analog modulation scheme.
Quadrature Amplitude Modulation         
  • Bit-loading (bits per QAM constellation) on an ADSL line
  • Analog QAM: measured PAL color bar signal on a vector analyzer screen.
  • Digital 16-QAM with example constellation points
  • Constellation points for 4-QAM, 16-QAM, 32-QAM, and 64-QAM overlapped
  • The graphs of the sine (solid red) and [[cosine]] (dotted blue) functions are sinusoids of different phases.
FAMILY OF DIGITAL MODULATON METHODS OF TELEVISION SIGNALS
QAM-modulated; Quadrature Amplitude Modulation; QAM; 256QAM; 256-QAM; 16-QAM; 16QAM; 64-QAM; 64QAM; 2-QAM; 2QAM; 4-QAM; 4QAM; 8-QAM; 8QAM; 32QAM; 32-QAM; 128-QAM; 128QAM; 512-QAM; 512QAM; 1024QAM; 1024-QAM; 2048QAM; 2048-QAM; 4096-QAM; 4096QAM; IQ Modulation; Qam
(QAM) A method for encoding digital data in an analog signal in which each combination of phase and amplitude represents one of sixteen four bit patterns. This is required for fax transmission at 9600 bits per second. (1995-02-02)
QAM         
  • Bit-loading (bits per QAM constellation) on an ADSL line
  • Analog QAM: measured PAL color bar signal on a vector analyzer screen.
  • Digital 16-QAM with example constellation points
  • Constellation points for 4-QAM, 16-QAM, 32-QAM, and 64-QAM overlapped
  • The graphs of the sine (solid red) and [[cosine]] (dotted blue) functions are sinusoids of different phases.
FAMILY OF DIGITAL MODULATON METHODS OF TELEVISION SIGNALS
QAM-modulated; Quadrature Amplitude Modulation; QAM; 256QAM; 256-QAM; 16-QAM; 16QAM; 64-QAM; 64QAM; 2-QAM; 2QAM; 4-QAM; 4QAM; 8-QAM; 8QAM; 32QAM; 32-QAM; 128-QAM; 128QAM; 512-QAM; 512QAM; 1024QAM; 1024-QAM; 2048QAM; 2048-QAM; 4096-QAM; 4096QAM; IQ Modulation; Qam
Quadrature Amplitude Modulation (Reference: HiperLAN/2, 802.11a)