Talk:Receiver (information theory)

Real world receiver performance

A complete model of a receiver depends of the communications link. A receiver that performs within a small fraction of a dB along the Eb/No curve prediction for the bit error rate is achievable even at ratios below 1:1. Many radio communication systems are limited by factors not considered by the channel coding limit. Factors for which good analyses exist include, the fading channel (terrestrial radio wave propagation is rarely completely stable over time), carrier synchronization and bit synchronization (are not independent. the optimal design maximizes the a posteriori estimate, even stationary terrestrial sources experience varying propagation delay), the short term frequency stability of transmitter and receiver (alter the optimum MAP receiver design). Additionally, the architecture of many common radio communication links intentionally degrades the performance near the noise floor in order to improve the link’s performance at higher SNR using low quality components or simplified transceiver modulator and demodulator schemes in order to meet cost and size goals or to incorporate a novel scheme in order to secure intellectual property rights to limit or exclude competitors. PolychromePlatypus (talk) 13:00, 12 May 2020 (UTC)