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How to Realise a Superior Modem?

Implementation Aspects of an IEEE 802.16 Transceiver

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Broadband Fixed Wireless Access

Part of the book series: Signals and Communication Technology ((SCT))

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6.5 Summary

In this chapter, we have provided a brief review of the implementation challenges in designing cost-efficient BFWA transceivers. The overall architecture was our first point of attention. The top-level architectural choices are normally taken at a very early stage in the design process, and may have a tremendous impact on the quality of the final result. Flexible interfaces between hardware and software and between digital and analog processing were pointed out as crucial features.

Next, the baseband receiver implementation has been discussed. It was demonstrated there is a large similarity between single-carrier modulation with frequency-domain processing and OFDM. Furthermore, several techniques for channel estimation, symbol timing synchronization, and carrier frequency synchronization, for these block-based communication schemes were briefly reviewed.

Finally, we discussed the radio front-ends. Our approach consisted in the adoption of a low-cost direct conversion radio and the compensation of the resulting analog impairments in the digital domain. In this perspective, we discussed techniques for PAPR reduction, I/Q imbalance compensation, phase noise compensation, and radio filter design.

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Authors and Affiliations

  1. Flanders’ Mechatronics Technology Centre, Belgium

    Marc Engels (general manager)

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  1. Marc Engels
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Engels, M. (2006). How to Realise a Superior Modem?. In: Broadband Fixed Wireless Access. Signals and Communication Technology. Springer, Boston, MA . https://doi.org/10.1007/978-0-387-34593-2_6

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  • DOI: https://doi.org/10.1007/978-0-387-34593-2_6

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-0-387-33956-6

  • Online ISBN: 978-0-387-34593-2

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