Channel Encoder is a machine or software responsible for adding redundant bits to #source code words in order to transform them into channel code words which could be reliably transmitted in a potential noisy channel. It will usually proceed to Modulator#.
At the receiver end, Channel Encoder will transform the received channel code words into estimated source code words and pass them to #Source Encoder. In practice, Error Control Coding may be used in order to achieve acceptable performance.
Systematic Code is a #Block Code in which message bits are transmitted in unaltered form. The use of Systematic Code simplifies the implementation of #decoder.
Source Encoder is a machine or software responsible for compressing the Information# to source code word by removing redundant bits. Removing those redundant bits actually make the transmission process for efficient as uses less resources to produce the same or more output. It will usually proceed to Channel Encoder#.
At the receiver side, Modulator will act as a Demodulator, where it transforms the analogue symbol into estimated channel code words and pass it to #Channel Encoder.
Error Control Coding is a practical solution to enable acceptable Information# quality in a channel with fixed \(\frac{E_b}{N_0}\) (from #Channel Capacity Theorem). To achieve acceptable error performance, Error Control Coding usually trade-offs bandwidth and system complexity (due to redundancy from #Channel Encoder).
Channel Encoder# is subjected to a device that practice this theorem.