Radio receiver comprising analog dynamic compression and digital expansion

摘要

2.1 The invention relates to a radio receiver (2) for a phase- or frequency-modulated communication signal (e), comprising an analog receiving section (10) with nonlinear dynamic compression (22), with an analog/digital converter (25) and with a digital signal processing section (30). Nonlinear distortion occurs in the communication signal due to the non-linear dynamic compression. 2.2 To prevent this non-linear distortion, it is proposed that the digital signal processing section (30) exhibits an expansion section (29) for compensating for the non-linear dynamic compression (22) of the analog receiving section (10). For this purpose, inverse function values inversely proportional to the characteristic of the non-linear dynamic compression (22) are determined for each pair of samples of digitised quadrature components (Id, Qd) of the communication signal (e) and used for equalisation in the expansion section (29). 2.3 Radio receiver for mobile radio transmission systems.