Jing Xiaojun

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Scheduling plays an important role of mapping interactive simulation tasks onto heterogeneous computing nodes in simulation grid. A multi-objective multi-constrained task scheduling model was established considering the consumption of task load, message interaction between tasks, load of computing nodes, and communication delay. And the problem was solved(More)
Many fingerprint images are of very poor quality, which will greatly damage the performance of the automatic fingerprint identification system (AFIS). In order to ensure that the performance is robust with respect to the quality of input fingerprint images, an enhancement algorithm is necessary. Gabor filter is a very effective tool for image enhancement.(More)
3GPP LTE specification is stable now in release 8. To meet much higher requirements than release 8, 3GPP has initiated the LTE-A (LTE-Advanced) study item. In LTE-A, CoMP (Coordinated multiple point transmission and reception) and CA (carrier aggregation) are two new features. CoMP is used to improve coverage and to increase cell-edge throughput. It is(More)
Distributed multi-view video coding (DMVC) [1] has become a focus due to the prosperity of the multimedia applications in wireless sensor networks. We propose a novel method of an adaptive scheme, named side-information-adaptive Low Density Parity Check (LDPC) coding. Apart from the existing multiple side-information implications in DMVC, this paper is(More)
High Altitude Platform Stations (HAPS) can be affected by stratospheric winds. In this paper, a novel HAPS-CDMA swinging model based on a fixed angle beam forming is presented. And the impacts of the model are examined. From numerical results it is observed that the platform swinging can't be neglected. When swinging angle reaches 1°, the intra cell(More)
Non-static transmission time interval (TTI) strategy is investigated in this paper, in order to improve the available potential performance of the enhanced uplink dedicated channel in universal telecommunication radio access low chip rate time division duplex system (UTRA LCR TDD). This strategy introduces a joint support of two kinds of TTI, 20ms and 5ms(More)
Unrestricted access to the Wideband Code Division Multiple Access (WCDMA) network depends on availability of and unrestricted access to Orthogonal Variable Spreading Code Factor (OVSF) codes. The OVSF codes, if not carefully assigned to users are easily exhausted. Here we propose an improvement to an existing algorithm, Region division Allocation and tagged(More)
There are many advantages to put the Inverse Synthetic Aperture Radar (ISAR) system up in the stratosphere. Compared with the Ground-based ISAR system, one problem of the Stratospheric ISAR system is the platform drifting. This paper established models for the different positions of the airship and investigated the effects of drifting on imaging. The(More)
Orthogonal Variable Spreading Factor (OVSF) channelization codes limit the performance of third generation(3G) mobile communication systems employing Wideband Code Division Multiple Access(WCDMA). Internal fragmentation occurs when allocated data rate is larger than what is requested while external fragmentation occurs when the OVSF code tree is too(More)
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