By Luca Fanucci, Marco Luise, Filippo Giannetti, Massimo Rovini
An Experimental method of CDMA and Interference Mitigation used to be written with the admittedly formidable reason of filling the space among communique conception and VLSI implementation, and hence to supply a extra general/theoretical method of the layout, improvement, and checking out of a CDMA receiver. for that reason, the ideas and strategies which are offered turn into acceptable to a extra normal type of electronic instant modems by way of receiver structure layout and implementation.
As the reader will simply discover, the topic of electronic modem layout and implementation is addressed within the publication ranging from a theoretical technique (supported by way of right bibliographic references), and is via software concerns, on the subject of an ESA test assumed as a case learn. an entire layout movement, from specification to implementation, together with trying out and ultimate verification is then awarded. This leads the reader step by step to a radical knowing of CDMA transmission and detection, and constitutes a pragmatic information for the layout of VLSI instant cellular terminals.
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Extra info for An Experimental Approach to CDMA and Interference Mitigation: From System Architecture to Hardware Testing through VLSI Design
Ts L Tc . 30) L where we have introduced the following operators ^k ` L §k· int ¨ ¸ , k L ©L¹ k mod L . 30), in which the amplitude coefficient A has the same meaning as in Figures 2-1 and 2-2. It can be shown, in fact, that the PSD of the DS/SS signal is given by the convolution between the narrowband PSD of the data and the wideband PSD of the spreading sequence, and that the power of the DS/SS signal is exactly the same as the power Ps of the narrowband signal. ~ dm 1/Ts L Chip Pulse Shaping Filter 1/Tc 1/Tc g (t) (ss) ~ s (t) A T 1/Tc ck Figure 2-5.
In a sense, we use a sort of code re-use technique, where code refers to the (orthogonal) channelization codes in each cell/beam.
It can be shown, in fact, that the PSD of the DS/SS signal is given by the convolution between the narrowband PSD of the data and the wideband PSD of the spreading sequence, and that the power of the DS/SS signal is exactly the same as the power Ps of the narrowband signal. ~ dm 1/Ts L Chip Pulse Shaping Filter 1/Tc 1/Tc g (t) (ss) ~ s (t) A T 1/Tc ck Figure 2-5. Baseband block diagram of a DS/SS transmitter. It is apparent that the sections of the DS/SS transmitter in Figure 2-5 are the same as those in Figure 2-2, provided that the chip rate Rc 1/ Tc is exchanged with the symbol rate Rs .