Method and apparatus for uniquely encoding channels in a...

Details Method and apparatus for uniquely encoding channels in a... Method and apparatus for uniquely encoding channels in a...

H - Electricity

04

L

354/105, 354/223

H04L 25/14 (2006.01) H04B 1/74 (2006.01) H04B 7/17 (2006.01) H04J 3/06 (2006.01) H04J 3/07 (2006.01) H04L 1/02 (2006.01)

Patent

CA 1066421

METHOD AND APPARATUS FOR UNIQUELY ENCODING CHANNELS IN A DIGITAL TRANSMISSION SYSTEM Abstract of the Disclosure In a digital transmission system of the type which employs cross-polarized radio channels, the failure of a transmitter associated with a particular channel can cause an undesired signal cross-over into the receiver of the failed channel. According to the instant invention, each channel in the system is uniquely encoded by a combination of bitstream inversion and bitstream delay at the head end of the system. Thus, if a signal cross-over occurs an excessive number of parity violations are detected in the failed channel and a switch to a protection channel is requested.

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