An 8-user UMTS channel unit processor for 3GPP base station applications
C. Thomas, T. Prokop, M.A. Bickerstaff, J. Niemasz, P. Bernadac, P. Saintot, Rafael P. Laufer, D. Bescher, R. Parra Michel, B. Walker, F. Derriennic, N. Burban, Estevão Pape, Joris Moreau, Insuk Cha, Stefano L. Angioni, K. Mhirsi, J. Lee, P. Prat, G. Rogard · 2004
We present a multi-user W-CDMA baseband channel unit processor ASIC for cellular base station applications. The ASIC is compliant with the 3GPP/UMTS standard and exceeds 3GPP minimum requirements for high-speed data by 2.1 to 6.35 dB. It supports up to 8 users simultaneously, with a mix of voice and data services and a maximum uplink data rate of 384 kbps. The ASIC implements preamble detection, searching, RAKE-finger demodulation, channel coding/decoding for voice and data services, and transmission functions. It is coupled to a DSP to form a complete channel element for 8 users. The ASIC has 1.88 M gates plus 2.7 Mbits of SRAM in a 0.16 /spl mu/m CMOS process at 61.44 MHz.