Sequential Block Orthogonal Signaling with Two Noiseless Decision Feedbacks

A sequential block orthogonal signaling scheme with both an intermittent and a final decision feedback is developed. The reliability function for this communication technique is shown to be bounded below by , for where αmaxis one-half of the ratio of the maximum transmitted signal average power Ppmaxto the expected transmitted signal average power . The transmitter power advantage of this feedback scheme in a nonasymptotic operational mode is also presented.