Source-adaptive power allocation for digital modulation

摘要

A novel joint source channel-coding technique called source-adaptive power allocation is introduced for the transmission of continuous-amplitude waveform source samples over a noisy channel. Starting from a binary or quaternary digital modulation scheme we apply a power control, which depends on the unquantized source samples, to the modulation signal points before they are transmitted over the channel. The resulting system shows strongly superior performance compared with conventional schemes.