In this paper, a reconfigurable receiver front-end for the frequency range of 800 MHz to 2.5 GHz is presented. The radio frequency front-end is realized in wideband form with reconfigurable baseband filter. The proposed frontend targets the GSM, WLAN, WCDMA, and GPS standards residing in the aimed frequency range. The necessary specifications for each individual standard have been revisited and recalculated. The interaction of the different standards and their interoperability has been thoroughly investigated and extra specifications derived for the multistandard receiver. The multistandard receiver has been designed, layouted, and simulated in RFCMOS 0.18-μm process.
Error Correction Code is very important in modern communication systems. BCH (Bose, Chaudhuri, and Hocqunghem) codes are being widely used in variety communication and storage systems. In this paper the construction and decoding BCH codes which are based on finite field arithmetic is introduced and also an improved algorithm for finding roots of polynomials over finite fields is proposed. This makes possible significant speed up of the decoding process of BCH codes.
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