The effect of time synchronization errors on the performance of cooperative MISO systems

Sumanth Jagannathan, Hamid Aghajan, Andrea Goldsmith

Research output: Contribution to conferencePaperpeer-review

74 Scopus citations

Abstract

We consider a wireless sensor network scenario where closely packed nodes can be grouped into clusters. Al-though each node might have only a single antenna, nodes within a cluster can cooperate during transmission or reception, thereby forming a cooperative Multiple Input Multiple Output (MIMO) system. Much of the work in the area of cooperative MIMO has assumed perfect synchronization between the nodes in the network and the associated benefits have been investigated. We examine this assumption in a system where a cluster of nodes cooperatively transmits to a single receive node over a flat fading channel. We evaluate the effect of clock jitter between nodes on the performance of this cooperative Multiple Input Single Output (MISO) system. The clock jitter at the transmit nodes results in the lack of a reference clock at the receive node and causes inter-symbol interference (ISI). This leads to a performance degradation in the system. However, simulation results indicate that jitters as large as 10% of the bit time do not have much effect on the BER performance of the system. We also show that when the channel is not undergoing fading, the power penalty due to the clock jitter is independent of the number of transmit nodes and the penalty increases as the SNR increases.

Original languageEnglish (US)
Pages102-107
Number of pages6
StatePublished - 2004
Externally publishedYes
EventIEEE Global Telecommunications Conference Workshops, GLOBECOM 2004 - Dallas, TX, United States
Duration: Nov 29 2004Dec 3 2004

Conference

ConferenceIEEE Global Telecommunications Conference Workshops, GLOBECOM 2004
CountryUnited States
CityDallas, TX
Period11/29/0412/3/04

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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