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D3.1 Report on simulation results of the E-Band digital base-band sybsystems

Executive Summary

This report documents an in-depth evaluation of the Digital Baseband, regarding the performance and hardware implementation of the different algorithms involved in the digital processing of the signal. The fulfilment of the requirements stated in WP1 is carefully analysed during the evaluation of each aspect of the DBB. Besides, this document provides a starting point for the hardware implementation of the DBB, to be carried out in the next deliverables of WP3.

 This document is divided into two parts. Firstly, the effects of the RF sub-blocks which have an impact on the DBB are evaluated. Each effect is analysed independently, and then a joint simulation including all the RF impairments is performed. Almost all the simulated impairments introduced a negligible degradation which fulfils the specifications of D1.2. However, IQ imbalance and the analogue base-band filters rise as the main contributors to the performance degradation. It is shown that using an ideal equalizer and algorithms for IQ imbalance compensation, the degradation can be reduced matching the system requirements.

Secondly, different algorithms of the DBB are evaluated to assure that a hardware implementation of the DBB still meets the specified requirements. Different FEC codes are simulated, and a Reed-Muller code and a Reed-Solomon code are proposed for protecting the signalling field and the information data, respectively. Then, the demodulator performance is evaluated including simulations about the frequency and timing synchronization, as well as phase offset calculations. Lastly, different IQ imbalance compensation algorithms are proposed to mitigate the high IQ mismatch introduced by the RF sub-block. The same applies for a hardware implementation of an adaptive equalizer.

Finally, it is concluded that the DBB could compensate all the RF impairments and meet the requirements; For IQ imbalance compensation, advanced techniques are required. 

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  • Project acronym

  • Project title
    Energy Efficient E-band transceiver for backhaul of the future networks

  • Project reference

  • Project coordinator
    CEIT (Spain)

  • Start date: 01/12/2012
    End date: 31/05/2016

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