Kód: 06825628
Baseband processing techniques for Code Division §Multiple Access (CDMA) systems generally fall into §two broad categories: error coding and signal §spreading. This thesis addresses these issues for §the Wideband CDMA (WCDMA) base ... celý popis
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Baseband processing techniques for Code Division §Multiple Access (CDMA) systems generally fall into §two broad categories: error coding and signal §spreading. This thesis addresses these issues for §the Wideband CDMA (WCDMA) baseband receiver. The §Third Generation Partnership Protocol (3GPP) §standards will be used in specifying the system §model. 3GPP systems support two forms of error §coding, i.e., convolutional coding and Turbo coding. §A Viterbi decoder is developed for convolutional §codes to optimize the likelihood of the estimated §information sequence. For Turbo coding, a Turbo §decoder, which attempts to maximize the log-§likelihood ratio of each information bit, is §introduced. The 3GPP standards also specify long and §short codes for signal spreading. For long codes, §linear estimation techniques are designed based on §specific cost and constraint functions. For short §codes, adaptive estimation techniques, which §minimize the mean-square error (MSE) cost, are §presented.
Zařazení knihy Knihy v angličtině Technology, engineering, agriculture Technology: general issues Engineering: general
1806 Kč
Osobní odběr Praha, Brno a 12903 dalších
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