1 0 00 1 0 10 1 0 10 0 1 01 0 0 11 0 1 11 0 0 10 1 0 11 0 0 11 0 0 11 0 1 10 1 1 10 0 1 00 1 0 11 1 1 0______________________________________ by performing a dot product of the projector words and the message word results in the encoded output bits 34 0001110011011111111010 34 as shown in table 1 in decoder 50 the projector words designate the vector memory locations which are to be incremented or decremented if the received bit is a zero or one respectively table 2 shows the projector words being the same as those used by transmitter 10 the table addresses specified by the projector words and the appropriate action being either increment inc the value of that location or decrement dec as determined by each encoded bit table 2______________________________________projector words address action______________________________________1 1 1 7 inc 0 0 1 1 inc 0 0 1 1 inc 1 0 0 4 dec 1 0 0 4 dec 0 1 1 3 dec 1 1 1 7 inc 1 1 0 6 inc 0 1 0 2 dec 0 1 0 2 dec 0 0 1 1 inc 1 0 0 4 dec 1 0 1.