You can increase throughput by adding repeaters around the solar system, but latency has a hard limit due to the speed of light. Also throughput could be incre

You can increase throughput by adding repeaters around the solar system, but latency has a hard limit due to the speed of light. Also throughput could be increased by changing or updating the modulation and coding schemes. AFAIK Pioneer and Voyger probes were still using PSK and FSK.