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Bit error rate measuring system

  • US 4,566,100 A
  • Filed: 04/19/1983
  • Issued: 01/21/1986
  • Est. Priority Date: 04/20/1982
  • Status: Expired due to Term
First Claim
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1. A system for equivalently measuring bit error rate of received M-phase digital phase-modulated waves by steps comprising multiplying a frequency of an M-phase digital phase-modulated wave by M, wherein M is a positive integer, phase-detecting the M-multiplied signal directly or after frequency conversion by using a reference carrier which is orthogonal to a boundary of an error region in a phasor diagram, detecting errors by comparing the phase detection output with a given threshold which is determined so as to correspond to said boundary of the error region, and counting the number of pulses which represent errors.

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