CN ratio measurement circuit

Details CN ratio measurement circuit CN ratio measurement circuit

1985-10-15

1987-09-22

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Measuring or testing of receiver

324 57N, 455304, 370 97, H04B 1700

Patent

active

046960570

ABSTRACT:
In a time division multiple access communication system including a nonlinear signal processing element, an accurate carrier power-to-noise ratio is obtained by the circuit of the present invention. In the inventive circuit, noise power is determined solely by the quadrature noise and, hence, is free from measurement errors caused by the compression of in-phase noise associated with a non-linear element in the transmission channel.

REFERENCES:
patent: 3350643 (1967-10-01), Webb
patent: 4107608 (1978-08-01), Saburi
patent: 4553086 (1985-11-01), Watanabe et al.
P. Hetrakul, "The Effect of Satellite Transponder Nonlinearities on the Performance of Binary PSK Systems" (49-55).

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