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# Fast Frequency-Hopping Dynamic Multiple-Access for Cognitive Radios: Suboptimum Noncoherent Maximum-Likelihood Multiuser Detection

Record type: Conference or Workshop Item (Paper)

We propose a novel dynamic multiple-access (DMA) scheme for application in cognitive radios (CRs). This DMA scheme is implemented by fast frequency hopping with $M$-ary frequency-shift keying (FFH/MFSK) associated with suboptimum noncoherent maximum-likelihood multiuser detection (ML-MUD). In our studies, we assume that the primary users (PUs) and the cognitive radio users (CRUs) are operated in the interweave paradigm. The PUs activate to communicate according to a Poisson process and the duration of an activation obeys exponential distribution. The bit error rate (BER) and throughput performance of the dynamic FFH/MFSK systems are investigated by simulations, when assuming communications over Rayleigh fading channels. Our studies and simulation results demonstrate that the dynamic FFH/MFSK with suboptimum noncoherent ML-MUD constitutes one of the promising candidates for DMA in CRs. It has low-complexity and employs high-flexibility for DMA and seamless transition between different frequency bands.

PDF 88-99099.pdf - Version of Record

## Citation

Zhang, Shuo, Yang, Lie-Liang and Zhang, Youguang (2010) Fast Frequency-Hopping Dynamic Multiple-Access for Cognitive Radios: Suboptimum Noncoherent Maximum-Likelihood Multiuser Detection At The Seventh International Symposium on Wireless Communications Systems (ISWCS), United Kingdom. 19 - 22 Sep 2010.

Published date: September 2010
Additional Information: Event Dates: 19 - 22 September 2010
Venue - Dates: The Seventh International Symposium on Wireless Communications Systems (ISWCS), United Kingdom, 2010-09-19 - 2010-09-22
Organisations: Southampton Wireless Group

## Identifiers

Local EPrints ID: 272626
URI: http://eprints.soton.ac.uk/id/eprint/272626
PURE UUID: f3c0ff3f-a663-4b8b-bd18-a30fe179b329
ORCID for Lie-Liang Yang: orcid.org/0000-0002-2032-9327

## Catalogue record

Date deposited: 05 Aug 2011 11:05

## Contributors

Author: Shuo Zhang
Author: Lie-Liang Yang
Author: Youguang Zhang