{"references": ["", "F. Casal Ribeiro, R. Dinis, F. Cercas, A. Silva, \"Efficient detection and\nquantization requirements for the uplink of base station communication\nsystems\". IEEE 2012", "B. Widrow, \"Statistical theory of quantization\", IEEE Trans. Instrum.\nMeas., vol. 45, no.2, pp. 353-361, Apr. 1996.", "Teresa Ara\u00faso, Rui Dinis, \"Performance evaluation of quantization\neffects on multicarrier modulated signals\", IEEE 2007.", "S.P. Lloyd, \"Least squares quantization in PCM\", IEEE Trans. Inform.\nTheory IT-28, 129-137 (1982)", "Gritsutenko, R. Dinis, K. Firsanov, \"Quantization for maximum\npreservation of information\", IASTED SPPRA'2013, Innsbruck,\nAustria, Feb. 2013.", "D. Dardari, \"Exact analysis of joint clipping and quantization effects in\nhigh speed WLAN receivers,\" in proc. IEEE ICC, Anchorage, AK, pp.\n3487-3492, May 2003.", "H. Rowe, \"Memoryless nonlinearities with Gaussian input: Elementary\nresults,\" Bell Syst. Tech. J., vol.61, no. 7, pp. 1519-1525, Sep. 1982.", "R Gray, \"Quantization noise spectra,\" IEEE Trans. Inf. Theory, vol. 36,\nno. 6, pp. 1220-1244, Nov. 1990.", "R.Dinis, A. Gusm\u00e3o, N. Esteves, \"On broadband block transmission\nover strongly frequency selective fading channels,\" in Proc. Wireless\n2003, Calgary, Canada, July 2003, pp. 261-269.\n[10] J. Max, \"Quantizing for minimum distortion\", IRE Trans. Information\nTheory, IT-6, pp. 7-12, 1960."]}

By employing BS (Base Station) cooperation we can increase substantially the spectral efficiency and capacity of cellular systems. The signals received at each BS are sent to a central unit that performs the separation of the different MT (Mobile Terminal) using the same physical channel. However, we need accurate sampling and quantization of those signals so as to reduce the backhaul communication requirements. In this paper we consider the optimization of the quantizers for BS cooperation systems. Four different quantizer types are analyzed and optimized to allow better SQNR (Signal-to-Quantization Noise Ratio) and BER (Bit Error Rate) performance.