The chip in base band includes following parts: serial type interface for connecting to chip in radio frequency; at least one D/A converter and at least one A/D converter are linked to transmitting filter and receiving filter through communication; hardware accelerator in the chip provides functional module in high integration level; two pieces of digital signal processor with memory unit capable of storing versatile functional modules and coprocessor; encryption and decryption modules, functional module for monitoring error, united matrix accelerator, and Viterbi coprocessor, Turbo coprocessor. Features are: small size, lowered power consumption and cost etc.