Thesis (M.A.Sc.)--University of Toronto, 1993.
|Series||Canadian theses = Thèses canadiennes|
|The Physical Object|
|Pagination||2 microfiches : negative.|
In this paper we study the effect of multipath propagation on the performance of the forward link of a CDMA cellular system. We assume that RAKE receivers are used by the mobile terminals to receive the multipath signals and derive signal-to-noise ratios (SNR) for the RAKE receiver output for both orthogonal and non-orthogonal spreading by: This thesis presents a study of a code division multiple access (CDMA) system in a multipath environment, such as the indoor wireless channel. This research was mo tivated by the lack of an exact analysis approach to spread spectrum communications where the . Code Division Multiple Access”, limitations of the cellular mobile radio environment can be overcome and the effects of co-channel interference can be reduced. Page 11 of 55 The concept of multipath propagation is very simple, there is no need for a diagram. Multipath propagation causes multipath interference, including constructive and destructive interference, and phase shifting of the signal; destructive interference causes fading. This may cause a radio signal to become too weak in certain areas to be received adequately, so multipath propagation can be detrimental in radio communication systems.
A multiuser communication system is considered where K users share a channel with multipath propagation by using code division for multiple access. Data mo. As a result, the three GNSS observables code-phase, carrier-phase, and C/N 0 are biased by multipath propagation. In this text, errors in code-phase and carrier-phase observations caused by multipath propagation are referred to as code multipath and carrier-phase multipath, respectively, and in general as multipath errors. One unwanted effect of multipath propagation is that multiple copies of a signal may arrive at different phases. Multipath Propagation Environment Jacek Stefański Gdansk University of Technology 11/12 Narutowicza Str., PL Gdansk, Poland [email protected] Abstract. The efficiency analysis a hyperbolic position location estimation in the multipath propagation environment in the wideband code division multiple access (WCDMA) interface was presented.
Multipath Propagation is a common occurrence with wireless devices as we discussed in last week’s #TechTuesday. To recap, multipath occurs when multiple signals from the transmitting antenna reach the receiving antenna via either a direct line of sight or by reflecting off of objects such as trees, walls, or furniture. Frequency-division multiple access is the oldest of all multiple access schemes, and was used in the first demand assignment system for satellites (i.e., single channel per carrier (SCPC)) and the first-generation of cellular mobile systems (i.e., the advanced mobile phone system (AMPS)). 8. _____ of TDMA system is a measure of the percentage of transmitted data that contains information as opposed to providing overhead for the access scheme. a) Efficiency b) Figure of merit c) Signal to noise ratio d) Mean View Answer. To take advantages of both of these two techniques and further improve the system performance, several multicarrier schemes combined with CDMA have been proposed, such as MC‐CDMA, Multicarrier DS‐CDMA and multi‐tone code division multiple access (MT‐CDMA) systems In these systems, the signals can be easily transmitted and received.