| 摘要 |
<p>PURPOSE:To send each signal constituting an information signal under the condition that each required quality is satisfied. CONSTITUTION:A serial/parallel conversion circuit 1-2 in a radio transmission station 1A divides an information signal 1-1 to be sent into n-sets (n is an integer being 2 or over) of information signals and each of spread spectrum circuits 1-3-1-1-3-n multiply n-kinds of spread codes decided corresponding to a quality signal by a spread code selection circuit 1-4 with each of the divided information signals. Thus, a synthesis circuit 1-5 synthesizes n-sets of signals subject to spread spectrum and a transmitter 1-6 sends the synthesized signal as a radio signal of a same frequency band.</p> |
