Which component is primarily used to convert analog signals into digital form in wireless communication?

The Digital Signal Processor (DSP) is primarily used to convert analog signals into digital form in wireless communication because it is specifically designed to handle and manipulate digital signals efficiently. In wireless communication systems, analog signals, such as those received from microphones or sensors, must be digitized for processing, transmission, and storage. The DSP performs this conversion by sampling the analog signal and quantizing the sample values, thus creating a digital representation of the original signal.

DSPs are equipped with specialized algorithms that enable them to process audio, video, and data signals rapidly and accurately. This capability is crucial in applications like telecommunications, where real-time data processing is necessary for maintaining signal integrity and quality.

While a modem does play a role in converting signals, it primarily focuses on modulating and demodulating signals for transmission over various mediums rather than specifically converting analog to digital. Decoders and routers serve different functions; decoders interpret coded signals or data, and routers direct data packets across networks but do not perform the conversion from analog to digital. Hence, the most fitting component for this task in wireless communication is indeed the Digital Signal Processor (DSP).