Channel Division Multiple Access

De Lacerda Neto, RL; Debbah, M; Hayar, AM

Channel Division Multiple Access

De Lacerda Neto, RL Debbah, M Hayar, AM

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Publication Type:: Conference
Issue Date:: 2007-03-12T22:05:37Z

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Field	Value	Language
dc.contributor.author	De Lacerda Neto, RL	en_AU
dc.contributor.author	Debbah, M	en_AU
dc.contributor.author	Hayar, AM	en_AU
dc.date.accessioned	2007-03-12T22:05:37Z
dc.date.accessioned	2012-12-15T02:29:39Z
dc.date.available	2007-03-12T22:05:37Z
dc.date.available	2012-12-15T02:29:39Z
dc.date.issued	2007-03-12T22:05:37Z
dc.identifier.uri	http://hdl.handle.net/10453/19627
dc.description.abstract	Ultra-WideBand (UWB) has been recently presented as a promising radio technology due to the large bandwidth available. This feature enables point to point high data rates at short range as well as high temporal resolution with long channel impulse reponses (CIR). In this paper, we present an original multiple access scheme called Channel Division Multiple Access (ChDMA), where we use the CIR as a user signature. The signature code is given by the channel and the users are separated by their position: this signature is uniquely determined by the user's position, which changes from one position to another. This signature location-dependent property provides decentralized flexible multiple access as the codes are naturally generated by the radio channel. The results derived can be straightforwardly applied to UWB ad-hoc networks. To analyze the multiple access scheme performance, we evaluate the channel capacity in a wideband power limited regime by the tradeoff of the spectral efficiency (b/s/hz) versus the ratio between the number of users and the system resolution. The framework is analyzed and validated by capacity assessments using UWB measurements performed at Eurecom and compared with classical CDMA schemes with random spreading. The following receivers are considered: optimal joint processing, single-user matched filter and MMSE receiver....	en_AU
dc.format.extent	183141 bytes
dc.format.mimetype	application/pdf
dc.language.iso	en_AU
dc.relation.replaces	http://hdl.handle.net/2100/104
dc.title	Channel Division Multiple Access	en_AU
dc.type	Conference
utslib.copyright.status	open_access

Abstract:

Ultra-WideBand (UWB) has been recently presented as a promising radio technology due to the large bandwidth available. This feature enables point to point high data rates at short range as well as high temporal resolution with long channel impulse reponses (CIR). In this paper, we present an original multiple access scheme called Channel Division Multiple Access (ChDMA), where we use the CIR as a user signature. The signature code is given by the channel and the users are separated by their position: this signature is uniquely determined by the user's position, which changes from one position to another. This signature location-dependent property provides decentralized flexible multiple access as the codes are naturally generated by the radio channel. The results derived can be straightforwardly applied to UWB ad-hoc networks. To analyze the multiple access scheme performance, we evaluate the channel capacity in a wideband power limited regime by the tradeoff of the spectral efficiency (b/s/hz) versus the ratio between the number of users and the system resolution. The framework is analyzed and validated by capacity assessments using UWB measurements performed at Eurecom and compared with classical CDMA schemes with random spreading. The following receivers are considered: optimal joint processing, single-user matched filter and MMSE receiver....

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http://hdl.handle.net/10453/19627