Zobrazeno 1 - 10
of 150
pro vyhledávání: '"Jondral, Friedrich K."'
Autor:
Kaushik, Ankit, Sharma, Shree Krishna, Chatzinotas, Symeon, Ottersten, Björn, Jondral, Friedrich K.
We study the performance of cognitive Underlay System (US) that employ power control mechanism at the Secondary Transmitter (ST) from a deployment perspective. Existing baseline models considered for performance analysis either assume the knowledge o
Externí odkaz:
http://arxiv.org/abs/1609.02446
Autor:
Kaushik, Ankit, Sharma, Shree Krishna, Chatzinotas, Symeon, Ottersten, Björn, Jondral, Friedrich K.
In this letter, we study the performance of cognitive Underlay Systems (USs) that employ power control mechanism at the Secondary Transmitter (ST). Existing baseline models considered for the performance analysis either assume the knowledge of involv
Externí odkaz:
http://arxiv.org/abs/1510.03353
Autor:
Kaushik, Ankit, Sharma, Shree Krishna, Chatzinotas, Symeon, Ottersten, Björn, Jondral, Friedrich K.
Secondary access to the licensed spectrum is viable only if interference is avoided at the primary system. In this regard, different paradigms have been conceptualized in the existing literature. Of these, Interweave Systems (ISs) that employ spectru
Externí odkaz:
http://arxiv.org/abs/1509.01774
We study multiple-input multiple-output (MIMO) based downlink heterogeneous cellular network (HetNets) with joint transmit-receive diversity using orthogonal space-time block codes at the base stations (BSs) and maximal-ratio combining (MRC) at the u
Externí odkaz:
http://arxiv.org/abs/1412.7557
Analyzing heterogeneous cellular networks (HCNs) has become increasingly complex, particularly due to irregular base station locations, massive deployment of small cells, and flexible resource allocation. The latter is usually not captured by existin
Externí odkaz:
http://arxiv.org/abs/1408.2962
The objective of this paper is to extend the idea of Cognitive Relay (CR). CR, as a secondary user, follows an underlay paradigm to endorse secondary usage of the spectrum to the indoor devices. To seek a spatial opportunity, i.e., deciding its trans
Externí odkaz:
http://arxiv.org/abs/1404.4738
Autor:
Kaushik, Ankit, Jondral, Friedrich K.
Coexistence by means of shared access is a cognitive radio application. The secondary user models the slotted primary users channel access as a Markov process. The model parameters, i.e, the state transition probabilities (alpha,beta) help secondary
Externí odkaz:
http://arxiv.org/abs/1402.4933
Base station (BS) cooperation is set to play a key role in managing interference in dense heterogeneous cellular networks (HCNs). Non-coherent joint transmission (JT) is particularly appealing due to its low complexity, smaller overhead, and ability
Externí odkaz:
http://arxiv.org/abs/1402.2707
Despite being ubiquitous in practice, the performance of maximal-ratio combining (MRC) in the presence of interference is not well understood. Because the interference received at each antenna originates from the same set of interferers, but partiall
Externí odkaz:
http://arxiv.org/abs/1312.5938
This paper presents a tractable model for analyzing non-coherent joint transmission base station (BS) cooperation, taking into account the irregular BS deployment typically encountered in practice. Besides cellular-network specific aspects such as BS
Externí odkaz:
http://arxiv.org/abs/1308.0041