MMSE precoder for unitary space–time codes in correlated time-varying channels

This letter addresses the problem of the design of a precoder for multiple transmit antenna communication systems with spatially and temporally correlated fading channels. By using the asymptotic (high signal-to-noise ratio) mean-square error of the channel estimates, the letter derives a precoder for unitary space-time codes that can exploit the spatiotemporal correlation in the time-varying fading channels. Simulation results illustrate that significant performance gains can be achieved by using the new precoder.

Communicating the ethos of codes of ethics in corporate Australia, 1995-2001: whose rights, whose responsibilities?

This paper considers the commitment to business ethics of the top 500 companies operating in the Australian private sector and communicates the results of a longitudinal study conducted from 1995 to 2001. Primary data was obtained (in 1995 and again in 2001) via a self-administered mail  questionnaire distributed to a census of these top 500 Australian  companies. This commitment of each company to their code of ethics was indicated and measured via a range of methods used by organizations to communicate the ethos of their codes to employees. Just as they were in  1995, it would appear that companies in 2001 still are good at ensuring that their rights are protected, but at the same time they do not seem to take on the responsibility to ensure that employees'' rights are just as well protected. This double standard leads to cynicism towards the current business ethics processes inherent in Australian companies.

Codes of ethics: what are they really and what should they be?

Codes of ethics are prevalent in major corporations around the world. They are seen as the first tangible commitment to being ethical. This paper examines codes of ethics and tries to establish what they are, how they are developed and their net utility. We then proffer the idea of codes as the first part of a five-stage process that leads to an overall corporate commitment to being ethical in one's business dealings.

Combinatorial aspects of jump codes

We develop an approach to jump codes concentrating on their combinatorial and symmetry properties. The main result is a generalization of a theorem previously proved in the context of isodual codes. We show that several previously constructed jump codes are instances of this theorem.

The use of codes of ethics in the marketplace in corporate Australia : a longitudinal study

The stock market crash of 1987 was a defining moment in Australian corporate life. As a nation, we became acutely aware of the ‘moral bankruptcy’ that had come to permeate our corporate world. The focus on business ethics or the lack of it, in corporate Australia in the late 1980s, prompted this research.

The research for this paper that was first conducted in 1995 and replicated in 2001 focussed on the top 500 companies in Australia. These companies were surveyed on a raft of issues, one of which was their use of their codes of ethics in the marketplace. This paper examines the data sets from 1995 and 2001 and concludes that many of Australia’s largest enterprises have recognised the need for business ethics. As perceived by them, they can and do use their codes of ethics in a positive manner in the marketplace and attribute benefits to this interaction.

Precoder design for multi-antenna systems with temporally and spatially correlated fading channels

This paper addresses the problem of the design of a precoder for multiple transmit antenna communication systems with spatially and temporally correlated fading channels. Using the theories of matrix differential calculus, the paper derives a precoder for unitary space-time codes that can exploit the spatio-temporal correlation in the time-varying fading channels. The design criterion is based on minimizing the mean square error of the channel estimates. Computer simulation results show that a significant performance gain can be achieved by using the designed precoder.

The commitment of public sector Sweden to codes of ethics

This article examines the results of a study conducted of the top 100 public sector units in Sweden. These units are comprised of entities of government, municipalities, and county councils. The aim of the study was to examine and describe the commitment to codes of ethics in these Swedish public sector units. This article reports on the responses of those public sector units that possessed a code of ethics. The construct of commitment was measured by a consideration of the inputs, objectives and outputs of the code across six areas. The commitment to codes of ethics has an interest for those involved in the public sector in Sweden and society in general. Most public sector units are in the early stages of development and assimilation into overall ethics policies in code artefacts. On a specific level there are customized codes of ethics that are not always documented in a generic artefact. Theoretical and managerial implications are provided. Furthermore, suggestions for further research are proposed.

A comparative study of the contents of corporate codes of ethics in Australia, Canada and Sweden

This paper reports on and analyzes the contents of 197 corporate codes of ethics (78 Australian, 80 Canadian and 39 Swedish). Among other things, it was found that the contents of the Australian and Canadian codes were similar, reflecting the similar histories and cultures (as measured by Hofstede's dimensions) of these two countries. Further, the contents of the Swedish codes were found to be very different from the Australian and Canadian codes in some areas, reflecting the cultural differences between Sweden and the other two countries.

Strategic approaches of corporate codes of ethics in Australia: a framework for classification and empirical illustration

Purpose - Research has so far not approached the contents of corporate code of ethics from a strategic classification point of view. Therefore, the objective of this paper is to introduce and describe a framework of classification and empirical illustration to provide insights into the strategic approaches of corporate code of ethics content within and across contextual business environments.

Design/methodology/approach - The paper summarizes the content analysis of code prescription and the intensity of codification in the contents of 78 corporate codes of ethics in Australia.

Findings - The paper finds that, generally, the studied corporate codes of ethics in Australia are of standardized and replicated strategic approaches. In particular, customized and individualized strategic approaches are far from penetrating the ethos of corporate codes of ethics content.

Research limitations/implications - The research is limited to Australian codes of ethics. Suggestions for further research are provided in terms of the search for best practice of customized and individualized corporate codes of ethics content across countries.

Practical implications - The framework contributes to an identification of four strategic approaches of corporate codes of ethics content, namely standardized, replicated, individualized and customized.

Originality/value - The principal contribution of this paper is a generic framework to identify strategic approaches of corporate codes of ethics content. The framework is derived from two generic dimensions: the context of application and the application of content. The timing of application is also a crucial generic dimension to the success or failure of codes of ethics content. Empirical illustrations based upon corporate codes of ethics in Australia's top companies underpin the topic explored.

Investigating codes of ethics within the largest private sector organizations in Sweden and Turkey

The aim of the study was to examine the ways that private sector organizations in Sweden and Turkey communicated the intent of their codes of ethics to their employees. Primary data was obtained via a self-administered mail questionnaire distributed to a census of the top 500 private sector organizations in each country based on revenue. The study identified some interesting results that showed that the small group of companies in Turkey that have a code may be more advanced in ethics artefacts usage than Sweden. Such a conclusion is counterintuitive as one would have expected a developed nation like Sweden to be more advanced in these measures than a developing nation such as Turkey. The culture of one's country may playa large role in the implementation of ethics artefacts in corporations and could be a major reason for this difference.

A construct of the cross-cultural ethos of corporate codes of ethics (ECCE) : Australia, Canada and Sweden

The objective of this paper is to develop and describe a construct of the ethos of the corporate codes of ethics (i.e., an ECCE-construct) across three countries, namely Australia, Canada and Sweden. The ECCE-construct makes a contribution to theory and practice in the field as it outlines a theoretical construct for the benefit of other researchers. It is also of managerial interest to marketing organizations as it provides a grounded framework of areas to be considered in the implementation in organizations of corporate codes of ethics.

Public sector ethics in Sweden : a 4P-model of internal and external determinants in codes of ethics

This article summarizes and aggregates the results of a study conducted of the largest 100 public sector organizations derived from three categories in Sweden. These categories of organizations comprise 40 entities of government, 40 municipalities, and 20 county councils. The objective was to describe the determinants of codes of ethics in Swedish public sector organizations. This research reports on the responses of 27 organizations that possessed a code of ethics. The principal contribution is a 4P-model of seven internal and external determinants in public sector codes of ethics. The identified determinants relate to four principal sectors of a society, namely: public community sector, private corporate sector, private citizen sector, and political/policy conduct sector.