CDSP: An application-specific digital signal processor for third generation wireless communications

In this paper, we present an application-specific Digital Signal Processor (DSP) for third generation wireless communications. The processor architect ure and instruction set of proposed DSP are specially designed for the WCDM A system, where the Viterbi decoding and complex arithmetic are enhanced. T hese key features make the proposed DSP consume much lower processor MIPS a nd therefore outperform prior arts in terms of several crucial operations o f wireless applications. A prototyping chip has been implemented by using c ell-based design approach under TSMC 0.35um CMOS 1P4M technology. At 3.3V s upply voltage, it can operate up to 40 MHz.