Convolutional coding for high-speed microwave radio communications

This paper describes the design, testing, and measured performance of a rate 11/12 self-orthogonal convolutional codec that meets the bit-error-rate objective of M-state quadrature amplitude modulation systems in terrestrial radio transmission. The objective is to reduce a bit error probability of 10
⁻⁶
to 10
⁻¹⁰
or smaller. In fact, the measured output error probability is well below 10
⁻¹⁰
when the channel error probability is below 10
⁻⁵
.