By Luca Fanucci, Marco Luise, Filippo Giannetti, Massimo Rovini
An Experimental method of CDMA and Interference Mitigation was once written with the admittedly bold reason of filling the space among verbal exchange conception and VLSI implementation, and therefore to supply a extra general/theoretical method of the layout, improvement, and checking out of a CDMA receiver. hence, the suggestions and strategies which are offered change into appropriate to a extra basic type of electronic instant modems by way of receiver structure layout and implementation. because the reader will simply discover, the topic of electronic modem layout and implementation is addressed within the e-book ranging from a theoretical technique (supported by means of right bibliographic references), and is through program concerns, just about an ESA scan assumed as a case examine. an entire layout circulation, from specification to implementation, together with checking out and ultimate verification is then offered. This leads the reader step by step to a radical knowing of CDMA transmission and detection, and constitutes a realistic information for the layout of VLSI instant cellular terminals.
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Additional resources for An Experimental Approach to CDMA and Interference Mitigation: From System Architecture to Hardware Testing through VLSI Design
Particularly, owing to the exponential increase of both design gate counts and verification vectors, the verification gap grows faster than the design size by a factor of 2/3 according to the International Technology Roadmap for Semiconductor (ITRS) road map. This is the well known design productivity challenge that has existed for a long time. Figure 1-15 shows how Integrated Circuits (ICs) complexity (in logic transistors) is growing faster than the productivity of a design engineer, creating a ‘design gap’.
In so doing, the baseband received signal r (t ) in Figure 2-11 is actually a sampled digital signal, carrier recovery and chip matched filtering are digital, and the ‘sampler’ is just a decimator/interpolator that changes the clock rate of the digital signal. The ADC conversion rate of r (t ) is, in fact, invariably faster than the chip rate to perform chip matched filtering with no 41 2. Basics of CDMA for Wireless Communications aliasing problems. We shall say more about the digital architecture of the DS/SS receiver in Chapter 3 when dealing specifically with the MUSIC demodulator.
The auto- and crosscorrelation sequences are limited to 5 particular values we will not specify here (more details can be found in Kasami’s seminal paper [Kas68], in the extensive investigation about codes correlation properties by Sarwate and Pursley [Sar80] and in the survey on spreading codes for DS-CDMA by Dinan and Jabbari [Din98]). Let us now compare, in terms of capacity, the spreading arrangements previously discussed in Section 2. We assume a CDMA system with N active users, each transmitting at a bit rate Rb , and employing short spreading codes with period L and spreading factor M n L .
An Experimental Approach to CDMA and Interference Mitigation: From System Architecture to Hardware Testing through VLSI Design by Luca Fanucci, Marco Luise, Filippo Giannetti, Massimo Rovini