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    • By Admin / 19 Aug 22 / 0 Comments

      The Best Reception of Digital Signals

      In the digital communication system, the receiver receives sum of the transmitted signal and channel noise. The optimal reception of digital signals based on the “best” criterion with the smallest error probability. The errors considered in this chapter are mainly due to band-limited ...
      The Best Reception of Digital Signals
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    • By Admin / 17 Aug 22 / 0 Comments

      Composition of a Digital Baseband Signal Transmission System

      Fig. 6-6 is a block diagram of a typical digital baseband signal transmission system. It is mainly composed of a transmission filter (channel signal generator), a channel, a reception filter, and a sampling decider. In order to ensure the reliable and orderly operation o...
      Composition of a Digital Baseband Signal Transmission System
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    • By Admin / 16 Aug 22 / 0 Comments

      Introduction to Digital Baseband Signal Waveforms

      A digital baseband signal is an electrical waveform that represents digital information, which can be represented by different levels or pulses. There are many types of digital baseband signals (hereinafter referred to as baseband signals). Figure 6-1 shows a few basic baseband signal waveforms, ...
      Introduction to Digital Baseband Signal Waveforms
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    • By Admin / 15 Aug 22 / 0 Comments

      Learning About The Signal

      Acknowledgment signals can be divided into energy signals and power signals according to their strengths. Power signals can be divided into periodic signals and aperiodic signals according to whether they are periodic or not. The energy signal is finite in amplitude and duration, its energy is fi...
      Learning About The Signal
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    • By Admin / 12 Aug 22 / 0 Comments

      Frequency Division Multiplexing

      When the transmission capacity of a physical channel is higher than the demand of one signal, the channel can be shared by multiple signals. For example, the trunk line of a telephone system usually has thousands of signals transmitted on one optical fiber. Multiplexing is the technology that sol...
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    • By Admin / 11 Aug 22 / 0 Comments

      Common Code Types for Baseband Transmission

      1) The AMI code The full name of the AMI (Alternative Mark Inversion) code is the alternate mark inversion code. blank) remain unchanged. E.g: Message code: 0 1 1 0 0 0 0 0 0 0 1 1 0 0 1 1… AMI code: 0 -1 +1 0 0 0 0 0 0 0 -1 +1 0 0 -1 +1… The waveform corresponding to the AMI code is ...
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