Implementation of high-order modulation schemes for spectrally efficient mobile network wireless backhaul at extremely high frequencies

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There is an ever increasing demand for wireless mobile high-speed internet access. Thisdemand is mostly driven by media rich consumer applications (e.g. streaming of music andvideo). The development of 4G wireless networks will have the capacity to provide theseservices. However, the total aggregate data rates supporting exponential data traffic growth(more than doubling per year) will shift the bottleneck from the terminals to the mobilebackhaul (i.e. point-to-point wireless links). The capacity requirements for such links require ashift towards higher frequency of operation. The E-band (71-76GHz and 81-86 GHz) has beenallocated for this purpose and E-band microwave links are viewed as one of the importantcomponents of the wireless communication system of the future.E-band products available today and in the near future (2012) are only expected to achieve upto 1Gbps data rates with spectrum bandwidth using more than 2GHz of precious bandwidth &500MHz for the most spectral efficient systems.The market is looking for products that will both carry more data and work more efficientlywithin this spectrum, to maximize the total carrying capacity of the networks. Today there areno commercially available technologies that can simultaneously fulfill these requirements.This project will do proof-of-concept work to determine how advanced algorithms specificallydeveloped for E-Band can enable higher-order modulation schemes such as QAM64 to beimplemented at these frequencies, which will dramatically increase spectral efficiency andthroughput of the next generation of E-Band products.These new products will be key enablers of the continuing expansion of consumerapplications that use wireless communications, and the companies that win out in thecompetition to supply these products to the telecommunications industry will be positionedfor strong growth. Filtronic spotted the opportunity represented by E-Band very early on, andtook an early lead in developing wireless modules which are now starting to deploy into themarket. Filtronic have designed a 1Gbit/sec, 16QAM modulation product which will deployin Q1 2012 (see Appendix B.4) However, the competition from rivals such as EBandCommunications and BridgeWave is intense, and it is vital that Filtronic continue todifferentiate by developing higher-performance solutions that will maintain a lead over itsrivals and allow it to build market share.This project gives Filtronic an opportunity to accelerate the entry of higher speed & spectrumefficient products using modulation schemes such as 64QAM that can maintain itscompetitive edge.