Joint switched multi-spectrum and transmit antenna diversity for spectrum sharing systems

Mostafa Sayed, Mohamed Abdallah, Khalid Qaraqe, Mohamed Slim Alouini

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In spectrum sharing systems, a secondary user (SU) is allowed to share the spectrum with a primary (licensed) network under the condition that the interference observed at the receivers of the primary users (PU-Rxs) is below a predetermined level. In this paper, we consider a secondary network comprised of a secondary transmitter (SU-Tx) equipped with multiple antennas and a single-antenna secondary receiver (SU-Rx) sharing the same spectrum with multiple primary users (PUs), each with a distinct spectrum. We develop transmit antenna diversity schemes at the SU-Tx that exploit the multi-spectrum diversity provided by the existence of multiple PUs so as to optimize the signal-to-noise ratio (SNR) at the SU-Rx. In particular, assuming bounded transmit power at the SU-Tx, we develop switched selection schemes that select the primary spectrum and the SU-Tx transmit antenna that maintain the SNR at the SU-Rx above a specific threshold. Assuming Rayleigh fading channels and binary phase-shift keying (BPSK) transmission, we derive the average bit-error-rate (BER) and average feedback load expressions for the proposed schemes. For the sake of comparison, we also derive a BER expression for the optimal selection scheme that selects the best antenna/spectrum pair that maximizes the SNR at the SU-Rx, in exchange of high feedback load and switching complexity. Finally, we show that our analytical results are in perfect agreement with the simulation results.

Original languageEnglish
Article number6612909
Pages (from-to)4827-4839
Number of pages13
JournalIEEE Transactions on Wireless Communications
Volume12
Issue number10
DOIs
Publication statusPublished - Oct 2013

Fingerprint

Spectrum Sharing
Antenna
Antennas
Signal to noise ratio
Bit error rate
Binary phase shift keying
Feedback
Rayleigh fading
Fading channels
Transmitters
Error Rate
Receiver
Multiple Antennas
Rayleigh Fading Channel
Phase Shift
Transmitter

Keywords

  • spectrum sharing
  • Transmit selection diversity
  • transmit switched diversity

ASJC Scopus subject areas

  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Joint switched multi-spectrum and transmit antenna diversity for spectrum sharing systems. / Sayed, Mostafa; Abdallah, Mohamed; Qaraqe, Khalid; Alouini, Mohamed Slim.

In: IEEE Transactions on Wireless Communications, Vol. 12, No. 10, 6612909, 10.2013, p. 4827-4839.

Research output: Contribution to journalArticle

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