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    Design and implementation of HTS technology for cellular base stations : an investigation into improving cellular communication : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Electrical Engineering at Massey University, Palmerston North, New Zealand, and James Cook University, Townsville, Australia
    (Massey University, 2006) Knack, Adrian
    When placed between the antenna and receiver electronics of a cellular base transceiver station, a Cryogenic Receiver Front End (CRFE), consisting of a High Temperature Superconducting (HTS) filter and modern Low Noise Amplifier (LNA), can significantly improve the base stations' coverage and capacity. Due to CRFEs being hurried to the telecommunications industry in a competitive market, the development of CRFEs and their performance have been classified. This left it to be pondered whether HTS filters could really have been beneficial or if they were always just of academic interest. It is the main objective of this thesis to investigate if and under what circumstances high temperature RF-superconductivity can prove to be an important technological contribution to current and future wireless communications. This dissertation presents the analysis of an existing CRFE developed by Cryoelectra GmbH and its performance characteristics measured in a field trial held in rural China. With the aid of a CDMA Uplink Model developed by the author, the data was analysed and several novel engineering improvements were made to create an advanced CRFE which was economical to deploy. The analysis of results from a field trial in Beijing city using the CDMA Uplink Model led to the exploration of alternative filter technologies which could achieve similar results to the HTS filter technology. This culminated in the development of dielectric resonators filters which could be used as an alternative and as a supplement to the HTS filters used in the CRFE. The design of two novel dielectric resonator duplexers and two advanced multioperator combiner antenna sharing solutions followed the successful implementation of a high performance dielectric resonator filter. The performed investigation and development described in this thesis suggest that HTS filter technology for terrestrial wireless communications can be beneficial in current cellular networks, but due to its high cost is economical for use only under certain conditions. However, HTS filter technology may be of great importance in the design and implementation of spectrum friendly wireless communications systems in the future.
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    How will Robocop communicate? : the design of a conceptual portable radio communication product for NZ police in 2018 : a thesis presented in partial fulfilment of the requirements for the degree of Master of Design at Massey University, Wellington
    (Massey University, 2008) Ellis, Frazer D.
    This Master of Design study aims to communicate affective design principles within a Tait Electronics Ltd hand-held radio for the New Zealand Police to use in the year 2018. This investigation has three distinct research aims: A) Identify affective design principles appropriate for the design of current Tait portable police radios using the perceptual product experience (PPE) framework (Warell, 2008). B) Use speculative scenario planning to develop an understanding of how the requirements of Tait’s portable police radios will evolve over the next 10 years. C) Incorporate affective design principles and the brand values of Tait’s product range into a final conceptual portable police radio design for the year 2018. A comprehensive review of contemporary affective product design theory, case studies and other relevant literature was undertaken. This included affective product design (Warell, 2008), radio communication (Marzano, 2005) and future product forecasting (Lambourne, Feiz, & Rigot, 1997). Following this review the following research methods were selected for this study: 1) Future scenario planning 2) Current product-user interviews 3) Passive product observations Throughout the project iterative design methods were used, including 2D concept generation, concept development and 3D prototyping. The resulting conceptual product and associated documentation of this study will add to the existing body of knowledge around the application of affective design principles and portable police radio product design. Keywords: radio, NZ Police, usability, performance, experience, perceptual product experience (PPE), affective product design