This Masters thesis work describes a comparison between two different methods for estimation of the down channel (base station to mobile subscriber) in Wide-band Code Division Multiple Access (WCDMA). The first estimation method, Optimal Feed-forward Channel estimation (OFCE), is a conventional method that bases the estimates on data that is known to both sender and receiver, so called pilots. The second method, Decision Directed Channel estimation (DDCE), is an elaboration of OFCE. It also uses user data for estimation. Simulations show that DDCE, in comparison to OFCE, does not attain an improvement in signal-to-noise-ratio (SNR) for high bit error rates (BER).

This Masters thesis work describes a comparison between two different methods for estimation of the down channel (base station to mobile subscriber) in Wide-band Code Division Multiple Access (WCDMA). The first estimation method, Optimal Feed-forward Channel estimation (OFCE), is a conventional method that bases the estimates on data that is known to both sender and receiver, so called pilots. The second method, Decision Directed Channel estimation (DDCE), is an elaboration of OFCE. It also uses user data for estimation. Simulations show that DDCE, in comparison to OFCE, does not attain an improvement in signal-to-noise-ratio (SNR) for high bit error rates (BER). An improvement is only seen when the BER becomes much lower than what is common in real situations. In conclusion DDCE is complicated, involves many mathematical operations and gives insignificant improvement of SNR when BER takes common values. It is legitimate to question if it is possible to use the method in a real mobile phone system..

This Masters thesis work describes a comparison between two different methods for estimation of the down channel (base station to mobile subscriber) in Wide-band Code Division Multiple Access (WCDMA). The first estimation method, Optimal Feed-forward Channel estimation (OFCE), is a conventional method that bases the estimates on data that is known to both sender and receiver, so called pilots. The second method, Decision Directed Channel estimation (DDCE), is an elaboration of OFCE. It also uses user data for estimation. Simulations show that DDCE, in comparison to OFCE, does not attain an improvement in signal-to-noise-ratio (SNR) for high bit error rates (BER).

This Masters thesis work describes a comparison between two different methods for estimation of the down channel (base station to mobile subscriber) in Wide-band Code Division Multiple Access (WCDMA). The first estimation method, Optimal Feed-forward Channel estimation (OFCE), is a conventional method that bases the estimates on data that is known to both sender and receiver, so called pilots. The second method, Decision Directed Channel estimation (DDCE), is an elaboration of OFCE. It also uses user data for estimation. Simulations show that DDCE, in comparison to OFCE, does not attain an improvement in signal-to-noise-ratio (SNR) for high bit error rates (BER).

AbstractParental participation is something that is included in school either we like it or not. Several studies have been done about this phenomena but not many of them have examined the pupils estimation about parental participation. Therefore did we get interested about the pupils situation because why haven?t almost anyone asked the pupils about this phenomena when it?s constructed fore them? To learn more about the pupils estimation did we a questionnaire in twelve different classes with children in the ages between 10-16 years. The results we got from the questionnaire concerning the pupils estimation about parental participation were both expected and unexpected.Keywords: Parental participationQuestionnairePupil estimation.

The objective of this diploma work is to investigate a set of Multiple Input Multiple Output (MIMO) channel models compatible with the emerging IEEE 802.11n standard. This diploma work validates also advanced, innovative tools and wireless technologies that are necessary to facilitate wireless applications while maximizing spectral efficiency and throughput. MIMO channel models can be used to evaluate new Wireless Local Area Network (WLAN) proposals based on multiple antenna technologies. The purpose of this thesis is to investigate means of channel models and their implementation in different environments such as: Matlab, C++ and Advanced Design Systems (ADS). The investigation considers also a comparison between the channel models based on theoretical data and parameter setup to the channel models based on statistical characteristics obtained from measured data.

To be able to evaluate different radio waveforms in a laboratory environment FOI in Linköping has developed an experimental system for radio communication called Rasmus. The system consists of a transmitter, a channel emulator and a receiver. The transmitter modulates a digital signal to a desired analogue waveform. The channel emulator is used to simulate a real radio channel. The channel emulator distorts the signal by splitting it up in several propagation paths.

Today?s companies offer their products and services through multiple distribution channels in an increasing extent, in order to reach bigger markets and more customers. Multiple channels result in an increased risk for channel conflict.This essay is an exploratory and descriptive study with the purpose to explore some companies? channel conflicts on the basis of sales commission and price differences. A case study has been made at two different companies and the empirical material has been collected with qualitative interviews.We found more channel conflicts in the company that uses sales commissions than in the company that doesn?t.

No other object is in our constant possession such as the mobile phone. The smartphone has been transformed into a worldwide forum for information-rich exchanges between individuals and companies, by which this rapid access to the smartphone has created and continues to create opportunities in terms of communication. Many researchers of today undertake the challenge of studying the smartphone's role as a marketing channel, and the role of the channel is now undoubtedly central in marketing. However, as the importance of marketing communication increases and despite the fact that survey methods are exceedingly dependent on a channel to fulfill its purpose, namely carry out questionnaires, there has been surprisingly little attention to the study of the channel's role and importance when carrying out surveys. The main purpose of this paper is to investigate whether the choice of a communication channel affects the survey outcome and, if so, further investigate how survey methods differ in terms of consumers' attitude and also their perception of their privacy.

Purpose/Aim: The purpose of this essay is to analyze and discuss how MTV is affected by the development that takes place on the world?s media market. The aim is also to see how MTV?s target group?s image of the channel can give guidelines in how MTV should act in this new media era.Material/method: I have examined the development on the media market and then created a model consisting of relevant factors that could affect a TV-channel today. Those factors and the two factors image and profile are then applied on MTV.

Purpose/Aim: The aim of this thesis was to examine how multi channel publishing in different stages effect the work for journalists.Material/Method: The thesis is based on ten case studies selected from the literature and one conducted especially for this thesis. The case studies have been categorized according to a model that describes three strategies for multi channel publishing. The first strategy is to have a primary publishing channel, the second is to have separate editorial staffs for all publishing channels and the third is to treat all publishing channels equally.Main results: Journalists working for companies using the first strategy have not experienced any major differences in working conditions or work practices. For journalists employed by companies using the second strategy for multi channel publishing the effects on the journalists was noticeable but not major. The effects on journalists in companies using the third strategy are mainly stress and an uncertainty regarding how to use special media techniques..

The aim of this essay is to examine how the Internet functions as a communication channel to Event Marketing. We have investigated what makes the Internet unique as a communication channel for events and how Internet has been used for event marketing. We have mapped fundamental theories within marketing, media, communications and human-computer interaction, which together describe event marketing. We have carried out case studies on two event-marketing projects where the Internet has played a major role. The first project was XCT which is a project developed by the company Eventum AB.

Citizens? interaction with governments is an area with unique implications for channel management. Governments need to take the citizens perspective into further consideration in order to be successful in delivering high-quality e-services. This paper aims to determine if a categorization of citizen-initiated contacts from a citizen-centric perspective can be a valuable basis for decisions regarding e-service development. The study consisted of three steps.

In this master's thesis the problem of determining the uncertainty for an estimator of an unknown parameter is considered. The case we study is the estimation of gravity using a reversible pendulum. This involves the estimation of the point where two regression lines intersect. The estimated gravity is a function the coordinates of this point. One way to determine the uncertainty of this estimator is to use bootstrap methods.

With numerous applications in both military and civilian life, the demand for accurate 3D models of real world environments increases rapidly. Using an airborne laser scanner for the raw data acquisition and robust methods for data processing, the researchers at the Swedish Defence Research Agency (FOI) in Linköping hope to fully automate the modeling process.The work of this thesis has mainly been focused on three areas: ground estimation, image segmentation and classification. Procedures have in each of these areas been developed, leading to a new algorithm for ground estimation, a number of segmentation methods as well as a full comparison of various decision values for an object based classification. The ground estimation algorithm developed has yielded good results compared to the method based on active contours previously elaborated at FOI. The computational effort needed by the new method has been greatly reduced compared to the former, as performance, particularly in urban areas, has been improved.