The book "A Digital Front-End for a Combined Galileo/GPS Receiver" offers a comprehensive analysis, design, and implementation of a digital front-end that converts high-speed digital IF samples from an RF board into a complex, decimated baseband signal stream. This signal processing is specifically tailored to meet the requirements of a highly advanced combined Galileo/GPS receiver, with the algorithms presented also applicable in other contexts outside the GNSS receiver environment. The receiver operates at a sampling rate of 300 MHz, while the baseband signal stream is processed at 100 MHz. To minimize the cost and complexity of signal processing, the sampling rate is reduced by a factor of 3, optimizing the number of required filtering operations. The conversion of the real signal into a complex signal allows for a bandwidth of approximately 100 MHz, enabling the receiver to process the Galileo signal E5ab with a bandwidth of about 71 MHz.