A low complexity cyclostationary detector for OFDM signals

Allan, Douglas and Crockett, Louise and Stewart, Robert W.; (2017) A low complexity cyclostationary detector for OFDM signals. In: 2017 New Generation of CAS (NGCAS). IEEE, ITA, pp. 253-256. ISBN 9781509064472 (https://doi.org/10.1109/NGCAS.2017.19)

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Abstract

One of the key challenges for state of the art radio systems is enabling efficient utilisation of the Radio Frequency (RF) spectrum. Licensed frequency bands are often under-utilised in both time and geographical location and thus the opportunity exists for secondary users to transmit in these bands, provided that they do not interfere significantly with the operation of the primary licensed user. A proposed method for exploiting this opportunity is Cognitive Radio (CR) wherein the secondary user is able to modify its transmissions based on observation of the operating RF environment. Orthogonal Frequency Division Multiplexing (OFDM) is the enabling technology for many modern communications standards such as IEEE 802.11a (WiFi) and 4G Long Term Evolution (LTE). Therefore, facilitating robust and cost effective detection of OFDM signals is a key problem for the design of secondary user CR systems. In this paper, we derive and assess the performance of a low complexity detection scheme that exploits the inherent cyclostationarity of OFDM signals. We then present details of its implementation on a Xilinx Artix 7 FPGA and compare the resource cost of the proposed detector with another low complexity detection algorithm found in the literature.

ORCID iDs

Allan, Douglas ORCID logoORCID: https://orcid.org/0000-0002-8426-0189, Crockett, Louise ORCID logoORCID: https://orcid.org/0000-0003-4436-0254 and Stewart, Robert W. ORCID logoORCID: https://orcid.org/0000-0002-7779-8597;
  • Item type:Book Section
    ID code:62000
    Dates:
    Date
    Event
    28 September 2017
    Published
    21 July 2017
    Accepted
    Notes:© 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
    Subjects:Technology > Electrical engineering. Electronics Nuclear engineering
    Department:Faculty of Engineering > Electronic and Electrical Engineering
    Depositing user: Pure Administrator
    Date deposited:11 Oct 2017 11:10
    Last modified:18 Nov 2024 01:20
    URI:https://strathprints.strath.ac.uk/id/eprint/62000
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