1. Electronics’2004, Sozopol, September 23 Design of Mixed Signal Circuits and Systems for Wireless Applications V. LANTSOV, Vladimir State University lantsov@ieee.org Introduction Microelectronics in Mobile Communications CAD tools, mixed signal methods of analysis Wireless Design Methodologies Conclusions

2. Design of Mixed Signal Circuits and Systems for Wireless Applications Introduction Expansion of the market for portable wireless communication devices Time-to-market, low-power, CAD tools Design methodologies Integration on a single chip (system on a chip)

3. Design of Mixed Signal Circuits and Systems for Wireless Applications Microelectronics in Mobile Communications

5. Radio section (present time) –Direct conversion or low IF –Up and converters circuits – in a single chip –LF functions – in two chips and separate synthesizer or single CMOS device –Power supply – 3 V

6. Design of Mixed Signal Circuits and Systems for Wireless Applications Microelectronics in Mobile Communications Radio section (3G terminals) –Multimode and multiband operation –Wideband architectures –Programmable trackable filters –One chip implementation –Active control on power amplifier

7. Design of Mixed Signal Circuits and Systems for Wireless Applications Microelectronics in Mobile Communications Digital section (present time) –Single CMOS ASIC plus two standard ICs –ICs – SRAM and Flash memory –ASIC – speech coding and decoding, synchronization, demodulation and etc.

8. Design of Mixed Signal Circuits and Systems for Wireless Applications Microelectronics in Mobile Communications Digital section (3G terminals) –High bit rate –complexity of processing –Base-band Chip – DSP

9. Design of Mixed Signal Circuits and Systems for Wireless Applications CAD tools, mixed signal and RF methods of analysis System level special design tools (for example, AdvanceMS from Mentor) SPICE-like simulators for circuit level and mixed signal and RF designers Special CAD tools (ADS, SpectreRF, EldoRF, Microwave Office, PSP) Special numerical methods or platform methods: Shooting, Harmonic balance, Volterra series

10. Design of Mixed Signal Circuits and Systems for Wireless Applications Wireless Design Methodologies A lot of standards for personal communications Absence a good CAD tools Difficulties of using CAD tools Difficulties of transfer of specifications from system level to circuit level and implementations Absence of a good design methodologies

11. Design of Mixed Signal Circuits and Systems for Wireless Applications Wireless Design Methodologies Software-Defined Radio (SDR) technique –advances in A/D and D/A conversions (conversion of the signals close to the antenna) –growth in using of the DSP and FPGA devices (re- configurable hardware) Different frequency bands, different standards, different algorithms of demodulation and digital signal processing can be implemented by loading software into one hardware

12. Design of Mixed Signal Circuits and Systems for Wireless Applications Wireless Design Methodologies (Examples) Forward channel decoder structure

13. Design of Mixed Signal Circuits and Systems for Wireless Applications Wireless Design Methodologies (Examples) Reconfigurable channel decoder architecture

14. Design of Mixed Signal Circuits and Systems for Wireless Applications Wireless Design Methodologies (Examples) Receiver with selectable analog blocks architecture

15. Thank you