基于Markov方法的空時頻譜空穴的聯(lián)合感知和接入
發(fā)布時間:2018-07-15 09:09
【摘要】:為改善頻譜利用效率,把Markov方法引入到和位置相關的機會式頻譜接入系統(tǒng)模型中。推導了各個信道狀態(tài)的穩(wěn)態(tài)概率,研究了各穩(wěn)態(tài)概率隨虛報概率的變化規(guī)律,在此基礎上,根據(jù)頻譜空穴的感知準確度與主、次用戶相對位置的關系,在不同的主用戶區(qū)域采用不同的約束條件對次級用戶的吞吐量進行優(yōu)化,以充分利用空時頻譜空穴。根據(jù)以上研究,提出了一種新穎的基于Markov方法的空時頻譜空穴的聯(lián)合感知和接入方案。理論分析和數(shù)值計算表明,該方案能有效利用頻譜空穴的空時特性,極大地提高頻譜利用率。
[Abstract]:In order to improve the spectral efficiency, Markov method is introduced into the opportunistic spectrum access system model. The steady-state probability of each channel state is derived, and the variation of each steady-state probability with false report probability is studied. On this basis, according to the relationship between the sensing accuracy of the spectrum hole and the relative position of the primary and secondary users, The throughput of secondary users is optimized by using different constraints in different primary user areas to make full use of space-time spectral holes. Based on the above research, a novel joint sensing and access scheme for space-time spectral holes based on Markov method is proposed. Theoretical analysis and numerical calculation show that the proposed scheme can effectively utilize the space-time characteristics of spectral holes and greatly improve the spectral efficiency.
【作者單位】: 解放軍理工大學通信工程學院;濟南軍區(qū)裝備部;中國電子設備系統(tǒng)工程公司研究所;中國兵器工業(yè)新技術推廣研究所;解放軍68241部隊;
【基金】:973計劃(2009CB320403)資助項目
【分類號】:TN925
本文編號:2123554
[Abstract]:In order to improve the spectral efficiency, Markov method is introduced into the opportunistic spectrum access system model. The steady-state probability of each channel state is derived, and the variation of each steady-state probability with false report probability is studied. On this basis, according to the relationship between the sensing accuracy of the spectrum hole and the relative position of the primary and secondary users, The throughput of secondary users is optimized by using different constraints in different primary user areas to make full use of space-time spectral holes. Based on the above research, a novel joint sensing and access scheme for space-time spectral holes based on Markov method is proposed. Theoretical analysis and numerical calculation show that the proposed scheme can effectively utilize the space-time characteristics of spectral holes and greatly improve the spectral efficiency.
【作者單位】: 解放軍理工大學通信工程學院;濟南軍區(qū)裝備部;中國電子設備系統(tǒng)工程公司研究所;中國兵器工業(yè)新技術推廣研究所;解放軍68241部隊;
【基金】:973計劃(2009CB320403)資助項目
【分類號】:TN925
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