Download An Experimental Approach to CDMA and Interference by Luca Fanucci, Marco Luise, Filippo Giannetti, Massimo Rovini PDF

By Luca Fanucci, Marco Luise, Filippo Giannetti, Massimo Rovini

An Experimental method of CDMA and Interference Mitigation used to be written with the admittedly bold rationale of filling the space among communique concept and VLSI implementation, and hence to supply a extra general/theoretical method of the layout, improvement, and trying out of a CDMA receiver. subsequently, the options and methods which are awarded change into appropriate to a extra basic form of electronic instant modems when it comes to 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 through right bibliographic references), and is by way of program matters, on the subject of an ESA scan assumed as a case examine. a whole layout move, from specification to implementation, together with checking out and ultimate verification is then awarded. This leads the reader step by step to a radical figuring out of CDMA transmission and detection, and constitutes a pragmatic counsel for the layout of VLSI instant cellular terminals.

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Extra resources for An Experimental Approach to CDMA and Interference Mitigation: From System Architecture to Hardware Testing through VLSI Design

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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 . In particular, the chip shaping filter in Figure 2-5 outputs a new Tc energy pulse gT (t ) every Tc seconds. The index k ticks at the rate Rc , the chips’ subscript |k |L repeats every L chip intervals, and the data symbols subscript {k}L ticks at the rate LRc Rs as it should.

69) According to the theoretical description outlined above, the detection of a DS/SS signal can be accomplished by using the receiver architecture shown in Figure 2-8, whose baseband equivalent block diagram is depicted in Figure 2-10. It is also apparent that DS/SS communications require more complex receivers with respect to conventional narrowband signaling [De98b]. Suffice it to say that sampling at the filter output must be performed at chip (instead of symbol) rate, and this requires much faster signal processing capabilities.

12) and therefore Ad2 2˜ W 1 . 13) Whilst W-QAM is widely used in wireline modems, satellite communications more often rely on Phase Shift Keying (PSK) constellations. 14) 2. Basics of CDMA for Wireless Communications 25 so that Ad2 1 . 15) The two classes of PSK and QAM signals have a common element, since the two formats of 4-QAM and 4-PSK (or Quadrature Phase Shift keying, QPSK) are equivalent. 17) as the Fourier transform of the (discrete time) data autocorrelation sequence ^ ` Rdd  k E dm ˜ dm*  k .

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