نتایج جستجو برای: multipath fading
تعداد نتایج: 26003 فیلتر نتایج به سال:
In this paper, the effects of multipath fading and shadowing over the propagation channel are observed through the performance analysis of switch and stay selection combining (SSC) technique. The short term fading (multipath fading) in conjunction with the long term fading (shadowing) are both modeled by Generalized-K (KG) distribution. The proposed system is considered as interference-limited ...
This paper presents a new theory of multipath shape factors that greatly simplifies the description of small-scale fading statistics of a wireless receiver. A method is presented for reducing a multipath channel with arbitrary spatial complexity to three shape factors that have simple intuitive geometrical interpretations. Furthermore, these shape factors are shown to describe the statistics of...
This paper presents a theoretical analysis of the intercell interference statistics and capacity of CDMA systems in a multipath environment where every multipath signal is affected by Rayleigh fading. The power control is assumed to be fast enough to compensate the rapid fluctuations of the radio channel due to multipath fading. Unlike many previous works, mobile users are assumed to connect to...
A blind joint estimator for multipath diversity and PN code timing error is proposed in this paper for direct-sequence spread-spectrum signaling on a frequency-selective fading channel. In the multipath diversity combiner, a modi ed known modulus adaptive (KMA) algorithm is used to cope with time-varyingmultipath e ects and to perform multipath diversity combining in the blind mode. In the code...
This paper represents an end-to-end baseband model of the physical layer of a WiMAX network according to the IEEE® 802.16 standard. The model supports all mandatory and optional data rates 27 Mb/s. The model also illustrates adaptive modulation and coding over a flat-fading and dispersive multipath fading channel, whereby the simulation varies the data rate dynamically The channel estimation te...
In this paper, an adaptive multiuser detector based on interacting multiple model (IMM) is introduced to estimate the transmitted sequence corrupted by MAI (multiple access interference), multipath fading and noise. The proposed algorithm presents a novel multipath combining scheme based on a multiple model concepts and used in frequency selective Raleigh fading channels. The performance of the...
An adaptive multipath decorrelating multiuser receiver is considered for application in Rayleigh fading multipath channels with significant Doppler spread. Coherent diversity combining is performed using adaptively obtained channel estimates in a manner that minimizes the impact of estimation errors on data detection. The bit-error rate of the receiver is evaluated analytically, showing depende...
This chapter presents a novel theoretical framework for relating the small-scale fading characteristics of a wireless channel to multipath angle-of-arrival. A method is presented for reducing a multipath channel with arbitrary spatial complexity to three shape factors that have simple, intuitive geometrical interpretations. Furthermore, these shape factors are shown to describe the statistics o...
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