Performance Evaluation of WiMAX System OFDM Physical Layer for Flat-Fading and Multipath-Fading Channel Environments

摘要

In processing a location based query, that is propel to a geographic search engine, it retrieves documents that are more textual and spatially relevant. After retrieval search engine ranks the documents based on their combined relevance of textual and spatial aspects to query. Here in this case, both textual and spatial information should be indexed. Existing systems cannot handle both textual and spatial aspects simultaneously, so an adept index is needed that can handle textual and spatial aspects simultaneously. In this paper, we propose an efficient index called IR Tree which indexes textual and spatial information in an integrated way. IR Tree along with Top K document retrieval algorithm performs spatial and textual filtering, relevance computation, and also document ranking by considering the document length i.e., relevance is computed using document length.