Intellectual Property

OFDM Transmission and elimination of channel estimation using PPC

OFDM Transmission and elimination of channel estimation using PPC

A novel scheme for fast, efficient, resilient wideband OFDM

Description

OFDM Transmission and Elimination of Channel Estimation using Passive Phase Conjugation: Researchers at ECIT have developed a novel technology that enables OFDM data to be recovered after traversing a noisy multipath channel without the need for a channel equalizer, which is normally a pre-requisite for OFDM signal recovery.

The uniqueness of this solution is that a channel equalizer is not required, therefore the system is capable of operating in propagating environments whose characteristics are either unknown or are subject to change during operation (for example air or water).

The key innovation is the use of Passive Phase Conjugation (PCC) in an OFDM scheme. A conventional OFDM receiver is modified, replacing the standard equaliser with a PCC block. The approach requires only minor modification to existing OFDM demodulation and as the transmit section remains the same, there is compatibility with legacy as well as new systems.

Competitive advantage

  • Speed of establishing transmission – existing OFDM using a channel equalizer will require time to probe the channel and carry out compute intense mathematical process to choose the coefficients and therefore set-up appropriate transmission.
  • Lower power – No need for the computational intense channel equalizer.
  • Resilience to changing environment - when using OFDM, if the medium of transmission changes a new coefficient would need to be selected. In shallow water, or noisy air communications the transmission medium changes constantly.
  • Providing wideband digital communications in harsh environments – The scheme can provide up to 100Mbps (HD Video etc) in environments where wideband comms would normally be difficult to achieve (underwater or in noisy environments ie war-zone).
Market potential
  • Mainstream Communications Market - The invention would have numerous communications related applications, including radio, optical and acoustic. Many companies in the radio field are looking at OFDM for high data rate transmission, as new commercial opportunities arise especially as carrier frequency increases and channel models are not available / applicable then the approach we propose here would be extremely attractive.
  • Military - In the battlefield there is often deliberate clutter in the transmission environment that make communications difficult. This use of PCC in an OFDM scheme would actually benefit from the clutter, thus allowing robust wideband communication links ‘In-theatre’. Also, the ability to establish comms quicker more robustly and with wider bandwidth would allow driverless vehicles in convoy, controlled via video link remotely or via UAV.
  • First Responder Application – This technology would be well suited to first responder requirements. Where arriving at a disaster zone, an ad-hoc wireless network could be established instantly without the need to train signals and establish correct coefficients.

Funding

We have access to a range of potential funding mechanisms to support your business engage and exploit this IP including.

boosting-business Boosting Business through R&D is designed to help you ensure your business remains competitive and grows its market share. With support, you can invest in new products, services and processes, use design to improve your business performance, gain a better understanding of the technical, legislative and intellectual property issues you may face and access collaborative networks to access new business opportunities that might otherwise be beyond your reach. www.boostingbusinessni.com/research-and-development/
ktp Knowledge Transfer Partnerships are based on partnerships between academic groups and companies who need access to skills and knowledge in order to innovate. The academic and industrial partners jointly devise and manage a two or three year programme to achieve the advances the company needs. This programme of work is carried out in the company by a KTP Associate and the resulting relationship can be very challenging and rewarding to all parties www.ktponline.org.uk
qub-innovation-fund The Queen's University Belfast Innovation Fund (QUBIF) is a £1 million venture capital fund, set-up to invest in post Proof of Concept, pre-commercialisation spin-out companies. Funding rounds will be typically in the range of £50k to £200k and investments must be strongly related to the QUB research base. www.nispofunds.com/queensfund.html
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