Demodulator Statistics for Channel Access and Adaptive Spreading in Direct-Sequence Spread-Spectrum Packet Radio Networks

Boyd, Steven W.; Pursley, M.B.; Russell, H.B.

doi:10.1109/tcomm.2011.122110.090364

Cited by 2 publications

(4 citation statements)

References 15 publications

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“…New protocols for channel access and adaptive spreading are described and evaluated for use in direct-sequence spread-spectrum (DS-SS) packet radio networks in [9]. A channel-access protocol is developed to provide efficient use of the frequency band by multiple DS-SS signals, and we investigated the tradeoff between the additional capacity obtained from frequency reuse and the detrimental effects of co-channel interference caused by multiple simultaneous transmissions in the frequency band.…”

Section: Research Resultsmentioning

confidence: 99%

Receiver Statistics for Cognitive Radios in Dynamic Spectrum Access Networks

Pursley¹

2012

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Section: Research Resultsmentioning

confidence: 99%

Receiver Statistics for Cognitive Radios in Dynamic Spectrum Access Networks

Pursley¹

2012

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“…Protocols for combined channel access and adaptive spreading in DS-SS tactical radio are described and evaluated in [BPR11]. The channel-access protocol provides efficient sharing of the frequency band by multiple DS-SS signals and the adaptive transmission protocol controls the spreading factor of the transmitted signal to compensate for changes in channel conditions from one packet to the next.…”

Section: Scientific Progressmentioning

confidence: 99%

“…The combination of the two protocols gives a cross-layer protocol that uses demodulator statistics derived in the receivers of the tactical radios. Significant performance gains are obtained by the combination of adaptive channel access and adaptive spreading [BPR11].…”

Section: Scientific Progressmentioning

confidence: 99%

“…Our research on direct-sequence spread-spectrum (DS-SS) tactical radio networks [BoP09], [BPR11], [BoP10a] has produced results on initial power adjustment, adaptive coding, and adaptive spreading, and it has integrated the physical-layer adaptation with the media access (MAC) protocol. For adaptive coding and spreading in DS-SS radio transmissions, we rely on a demodulator statistic to provide the necessary information for the adaptation, so our protocol does not need pilot signals, training sequences, channel measurements, or parameter estimates.…”

Section: Scientific Progressmentioning

confidence: 99%

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Cognitive Radio for Tactical Wireless Communication Networks

Pursley¹

2011

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The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Research has been completed on adaptive modulation and coding for multicast transmission in a tactical packet radio network. Our adaptive multicast transmission compensates for changes in propagation conditions that occur from packet to packet during a session with one sender and multiple receivers. We also completed our research investigation of adaptive coding for frequency-hop communications over tactical communications channels that have time-varying fading and partial-band interference. New protocols were developed that combat fading and ABSTRACTResearch has been completed on adaptive modulation and coding for multicast transmission in a tactical packet radio network. Our adaptive multicast transmission compensates for changes in propagation conditions that occur from packet to packet during a session with one sender and multiple receivers. We also completed our research investigation of adaptive coding for frequency-hop communications over tactical communications channels that have time-varying fading and partial-band interference. New protocols were developed that combat fading and interference while providing throughput levels that are near the theoretical upper bounds. New distributed protocols for channel access and adaptive spreading were devised and evaluated for use in direct-sequence spread-spectrum packet radio networks that have no central controllers, access points, or base stations. Information theoretic bounds and tools have been derived that give performance benchmarks for practical protocols, provide analytical techniques for the minimization of resource consumption in tactical networks, and simplify the design of protocols for the adaptation of coding and spreading in direct-sequence spread-spectrum packet radios.

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Demodulator Statistics for Channel Access and Adaptive Spreading in Direct-Sequence Spread-Spectrum Packet Radio Networks

Cited by 2 publications

References 15 publications

Receiver Statistics for Cognitive Radios in Dynamic Spectrum Access Networks

Receiver Statistics for Cognitive Radios in Dynamic Spectrum Access Networks

Cognitive Radio for Tactical Wireless Communication Networks

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