DSP应用与实例1DSP APPLICATIONS SECTION 9 DSP APPLICATIONS I I I I I I I I I I High Performance Modems for Plain Old Telephone Service (POTS) Remote Access Server (RAS) Modems ADSL (Assymetric Digital Subscriber Line) Digital Cellular Telephones GSM Handset Using SoftFone Baseband Processor and Othello Radio Analog Cellular Basestations Digital Cellular Basestations Motor Control Codecs and DSPs in Voiceband and Audio Applications A Sigma-Delta ADC with Programmable Digital Filter 9.a DSP APPLICATIONS 9.b DSP APPLICATIONS SECTION 9 DSP APPLICATIONS Walt Kester HIGH PERFORMANCE MODEMS FOR PLAIN OLD TELEPHONE SERVICE (POTS) Modems (Modulator/Demodulator) are widely used to transmit and receive digital data using analog modulation over the Plain Old Telephone Service (POTS) network as well as privat……