Cohabitant Radars – Realization study for reducing mutual interference impact of radars – a necessity for future short distance applications, where radars are brought in massive use.
Background and Motivation
The development in the last decades within electronics has been truly been amazing. The down scaling of the chip technology and mass production have enabled highly advanced functionality in a large range of products such as within mobile communication, GPS and digital cameras. The experience from these areas has opened up possibilities to implement sophisticated functionality in other areas as in this case in radar technology. As an example, car radar is an area which can benefit from more sophisticated algorithms and system solutions now possible to implement in hardware. These possibilities are in fact quite essential since a massive use of radar close by will bring the fundamental issues of radar mutual interference in focus. Unlike communication signals, radar signals are shaped by their requirement of avoiding leakage of the strong transmit signal into the sensitive radar receiver – normally this is achieved by pulsing. However this requirement on signal shape prevents effective measures to minimize mutual interference. This study will investigate the possibility (already demonstrated) of cancellation radar in which the necessary transmit receive isolation is obtained by leakage cancellation. Achieving this, waveforms can be freely selected and particular chosen to minimize mutual interference. Though car radars serve as an important application, the issue of interference is pressing for all types of radar and the project will also consider the larger issue of radar system cohabitation for radars in general. As for short range radar it will include radars operating with meter range, where interference issues are a crucial shortcoming for radar applications in sensors for guidance and control.
Research Problem and Approach
As said to approach the problem of radar interference the project proposes a new principle for radar operation. The new approach is based cancellation to obtain isolation between the received signal and the transmit signal. A very deep cancellation is necessary but is in fact enabled by the transmit signal being exactly known. By a suitable radar design including the appropriate calibration paths, the radar transfer characteristics can be precisely determined, enabling equally precise software defined cancellation filter. The possibility of this radar principle has been demonstrated experimentally by Saab. After the required signal processing a net cancellation of no less than 160 dB was achieved.
This study will develop on two or three fronts. There will be one activity studying waveforms exploiting the same frequency band but providing a minimum of mutual impact. There will be another activity considering the appropriate hardware implementation of the technology, in particular when it comes to small and miniature systems, suitable for mass production such as car radars. Thirdly there will be an activity of determining the performance requirement to be met in order to ascertain that the cancelation principle will work. It is anticipated that level of required isolation will reduce significantly for the shorter range systems, meaning that such designs may be well suited for realization in the form of e.g. ASIC circuits.
Overall goal is to assess the feasibility and advantage of cancellation radar, for various fields of application. The advantage would depend on the complexity, reliability and cost of implementation, as well as what possible improvements regarding nearby radar operation is obtained. All these aspects will be covered in a final report. On particular goal is to identify new applications for radars (like guidance and control in e.g. robotics) not previously considered, since the possibilities of small and short range radars critically depends on the continuous and drastic improvements in miniature electronics.
Prepare Halmstad – Establishment of a prepare program for industrial PhD studies within the area of electronics
Bacckground and Motivation
There are a need to increase the understanding of PhD studies and enable more people in SME companies to qualify themselves for PhD studies. A milestone is to get more companies to understand the value that a PhD student can bring to a company in the form of knowledge, competence, and as a door opener to new networks and knowledge environments.
The project is performed in coproduction with external actors, divided in three activity blocks: A) planning: mandatory courses and elements and possible complementing courses. B) Development: Connection to present research is strengthen, templates (course plans, contracts etc.) and marketing materials are prepared. C) Establishment: Company contacts are intensified. Interviews with possible students and assessment/admission are planned. A company employed carries out a pilot prepare program to extract experiences. Marketing is conducted throughout the entire project.
Effects and results
Anticipated effects are a better understanding of PhD studies in SME companies within the region and an understanding of the advantage a company can have of industrial PhD student. Anticipated long term results are that the knowledge level in SME companies will increase and that their network connectivity to the global technology arena increase, which will increase the competitiveness for regional SME technology based companies on the global market.
Electromagnetic Compatibility for Next Generation embedded systems (EMC NG)
Background and Motivation
This research project is a strategic effort to increase the knowledge of the next generation of EMC requirements and possibilities in the context of two important and ongoing technology trends: the pervasive computing revolution, also known as Internet of Things (IoT), and new production methods, known as additive manufacturing. There is a need for understanding the new EMC environment and the requirements of electronics and embedded systems, which will follow in the footprints of the pervasive computing revolution. The pervasiveness of embedded systems, smart objects and IoT will be fulfilled by using the next generation of building and production practice. One of the most interesting emerging technologies in this context is additive manufacturing (3D printing) which has the potential to realize extreme integration of electronics and embedded systems.
Research Problem and Approach
The proposed research project is built around the EMC challenge of next generation embedded systems where high end research meets industrial best practice and innovation of new production methods and use of new materials. The focus is to conduct a comprehensive assessment, from an EMC perspective, of using additive manufacturing for integrating embedded electronics. The electromagnetic properties of the materials used in additive manufacturing are to be investigated, examples of important material parameters are: granularity, conductivity, permittivity, and permeability. Different additive production processes may provide varying structure granularity, spatial resolution, and a wide range of materials. However, there is a lack of standardized specifications for mechanical as well as electromagnetic properties enabling a good prediction on how manufactured parts will perform. To increase the opportunities of innovation in the area of additive manufacturing the following research questions have been formulated:
- How can we provide the necessary knowledge and control of processes, structures, and materials used in additive manufacturing to produce commercially useable devices?
- What electromagnetic properties do additive manufacturing provide, and does it provide new features usable for further integration of embedded electronics while sustaining EMC performance? What possibilities are there for extreme integration of electronic components, like antennas, for future wireless systems by applying additive manufacturing?
Besides the goal of achieving answers to the research questions, secondary goals of the project are: develop or improve laboratory measurement methods and models that more accurately reflect new requirements related to the pervasive computing vision; and develop best practice and recommendations for implementing these techniques into new EMC test standards. Accelerate the adoption of additive manufacturing and 3D printing technologies in the electronics sector and to increase competitiveness.