We offer comprehensive sharing and interference analysis for all types of radiocommunication systems operating in licensed and unlicensed bands. This involves designing and analysis of co-channel or adjacent channel interference scenarios to derive optimum spectrum sharing conditions, identifying potential mitigation techniques to minimise the impact of interference and developing sharing analysis techniques based on time-based simulation , Monte Carlo simulation and mathematical analysis. We also represent our clients at the various technical committees of the ITU, regional organisations such as the CEPT and standards bodies such as ETSI.
Spectrum sharing and interference analysis
We can help to design and optimise radio links in order to achieve a particular performance objective, based on equipment and propagation behaviour. Our analysis takes account of intra- and inter-system interference, trading-off different system parameters including multiple access methods, diversity, performance objectives, and coverage requirements. We also help collate, process and verify the technical data that has to be submitted for the purposes of licensing and coordination, at both a national and international level.
As part of system planning, we typically calculate minimum amount of spectrum required to roll out a network and analyse feasibility of co-existence among different wireless networks including cellular, PMR, broadcasting, fixed, license exempt, air-to-ground and satellite systems.
Field trials and measurement
Plum has undertaken field trials and measurement campaigns with a well-equipped survey vehicle and a variety of measuring receivers and spectrum analysers. We can gather robust data as the basis for developing models for various frequency bands and sharing environments. We are also capable of developing ad-hoc software tools to analyse the statistics of measured data.
We are a major contributor to Study Group 3, and a significant number of our measurement campaigns and associated mathematical analysis of the results have led to the development or modification of ITU-R propagation recommendations.
We have experience in analysing various aspects of emerging technologies (e.g. cognitive radio, machine to machine communications and 5G) with respect to the use of radio spectrum. Focus areas include coexistence analysis, likely deployment scenarios, licensing support, standardisation issues, business case analysis and demand forecasts.
We can provide consultancy support to specifically address the technical aspects of spectrum licensing. Through sharing analysis we can identify the minimum technical parameters that will need to be met as part of the overall licensing process, and have experience in developing licence consultation and tender documents. We can also help in the areas of spectrum valuation, trading and pricing in respect of the technical implications.
Bespoke software development
We have experience in developing bespoke software to implement a range of spectrum management tasks including radio system deployment, co-existence scenario design and propagation modelling. Our tools are capable of interfacing with terrain and clutter databases. We also design data logging and analysis software to provide reliable scripted interfaces and data aggregation to a wide variety of measurement equipment, including spectrum analysers, GPS, Wi-Fi, motors, relays and other serial, TCP/IP and GPIB devices.
Paul Hansell is a Partner at Plum and previously was Managing Director of Aegis Systems Ltd. Paul has over 30 years of experience in the field of radio spectrum management, firstly with the UK Post Office (the part that subsequently became British Telecom), then Logica, Aegis and currently Plum.
He has led and been involved in studies around the world ranging from advice to regulators and spectrum users on development of spectrum policy, implementing more liberalised spectrum management regimes, technology neutral spectrum usage rights, future market trends and associated spectrum needs, spectrum pricing and trading, to detailed interference studies. For example in Hong Kong he reviewed the national spectrum policy and advised the government regarding the implementation of a more liberalised spectrum management regime for the future.
Paul has BSc Honours Degree in Electrical Engineering from Imperial College, London. He is a European Engineer (Eur Ing), Chartered Engineer (CEng) and a Fellow of the Institution of Engineering and Technology UK (FIET).