The last seventy years have witnessed the transition of communication from Shannon's theoretical concept to current high-efficiency practical systems.With respect to Shannon information theory,to fulfill the high-...The last seventy years have witnessed the transition of communication from Shannon's theoretical concept to current high-efficiency practical systems.With respect to Shannon information theory,to fulfill the high-bandwidth utilization,any further increase in the data rate requires a significant augmentation in the received signal power unless the bandwidth is extended in proportion to the incremental data rate.展开更多
文摘The last seventy years have witnessed the transition of communication from Shannon's theoretical concept to current high-efficiency practical systems.With respect to Shannon information theory,to fulfill the high-bandwidth utilization,any further increase in the data rate requires a significant augmentation in the received signal power unless the bandwidth is extended in proportion to the incremental data rate.