Spread-spectrum signals with long signature sequences are considered in this papez Particularly, a linear receiver proposed in [1] and [2] for direct-sequence spreadspectrum multiple access systems is extended to its iterative form. This extension is most applicable in situations with high processing gain, where it is necessary at times to use a large number of correlators to acquire the PN seq...

Direct-sequence spread spectrum is popular for commercial wireless local-area networks, because license-free operation is permitted in certain frequency bands. The extensive development of equipment for such applications makes it attractive to investigate the use of the commercial technology for military communication networks. However, because of the small processing gain that is common in the...

in order to investigate the effect of processing type (whole straw bale processing or opened straw bale processing with urea) on diet digestibility, economical and productive parameters in feedlot cattle, 18 holstein bull with average body weight 224.72 ± 20.45 kg were used in a completely randomized design with 3 treatments and 6 replicate. treatments 1, 2 and 3 contained 40% typical straw, 40...

This research aims to determine the dynamism in Esa Tarendem farmer group Rurukan I Village, East Tomohon District. was conducted during June-August 2021. In Village , District, data used this study were primary and sequence data. Primary obtained through method of direct interviews with using a list questions / (questionnaires). Meanwhile, secondary taken from The results show that Farmer Grou...

We consider a packet data direct-sequence code-division multiple-access (DS-CDMA) system which supports integrated services. The services are partitioned into different traffic classes according to information rate (bandwidth) and quality of service (QoS) requirements. Given sufficient bandwidth, QoS requirements can be satisfied by an appropriate assignment of transmitted power and processing ...

In this paper, we propose two classes of multivalued signature sequences for direct sequence code division multiple access (DS/CDMA) systems. The proposed classes are obtained from the coefficients of the subbands of perfect reconstruction quadrature mirror filterbanks (PR-QMF). The first and second classes are derived from the tree and lattice structure PR-QMF banks, respectively, and they bot...

Wideband wireless access based on direct sequence code diviABSTRACT sion multiple access aimed at third-generation mobile communications systems is reviewed. W-CDMA is designed to flexibly offer wideband services which cannot be provided by present cellular systems, wi th various data rates as high as 2 Mb/s. The important concept of W-CDMA is the introduction of intercell asynchronous operation

In this paper, we propose a new differential semi-blind spatial-temporal beamforming receiver for asynchronous direct sequence wideband code division multiple access (DS-WCDMA) systems. The new receiver presents improved robustness to phase variations and reduction of the effects of nonlinear distortion.